diff --git a/.wakatime-project b/.wakatime-project
deleted file mode 100644
index 5fd3436..0000000
--- a/.wakatime-project
+++ /dev/null
@@ -1 +0,0 @@
-Noisy Shadow 59
\ No newline at end of file
diff --git a/1224/CMakeLists.txt b/20181224/CMakeLists.txt
similarity index 95%
rename from 1224/CMakeLists.txt
rename to 20181224/CMakeLists.txt
index 17e13f8..7511e15 100644
--- a/1224/CMakeLists.txt
+++ b/20181224/CMakeLists.txt
@@ -1,11 +1,11 @@
-cmake_minimum_required(VERSION 3.0)                                               
-set(CMAKE_CXX_STANDARD 17)                                                                           
-if(MSVC)                                                                                             
-    add_compile_options("/Zc:__cplusplus")                                                           
-endif()                                                                                              
-include_directories("C:\\Programs\\GCC\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\lib\\gcc\\x86_64-w64-mingw32\\8.1.0\\include\\c++\\x86_64-w64-mingw32") 
-add_executable(P01 P01.cpp)
-add_executable(P02 P02.cpp)
-add_executable(P03 P03.cpp)
-add_executable(P04 P04.cpp)
+cmake_minimum_required(VERSION 3.0)                                               
+set(CMAKE_CXX_STANDARD 17)                                                                           
+if(MSVC)                                                                                             
+    add_compile_options("/Zc:__cplusplus")                                                           
+endif()                                                                                              
+include_directories("C:\\Programs\\GCC\\x86_64-8.1.0-release-posix-seh-rt_v6-rev0\\lib\\gcc\\x86_64-w64-mingw32\\8.1.0\\include\\c++\\x86_64-w64-mingw32") 
+add_executable(P01 P01.cpp)
+add_executable(P02 P02.cpp)
+add_executable(P03 P03.cpp)
+add_executable(P04 P04.cpp)
 add_executable(P05 P05.cpp)
\ No newline at end of file
diff --git a/1224/P01.cpp b/20181224/P01.cpp
similarity index 96%
rename from 1224/P01.cpp
rename to 20181224/P01.cpp
index e1bad49..3799878 100644
--- a/1224/P01.cpp
+++ b/20181224/P01.cpp
@@ -1,21 +1,21 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-const int N = 1e5 + 50;
-int l[N], r[N];
-int main()
-{
-    int n;
-    scanf("%d", &n);
-    for (int i = 1; i <= n; i++)
-        scanf("%d%d", l + i, r + i);
-    int L = *min_element(l + 1, l + n + 1);
-    int R = *max_element(r + 1, r + n + 1);
-    int ans = -1;
-    for (int i = 1; i <= n; i++)
-        if (l[i] == L && r[i] == R)
-            ans = i;
-    printf("%d", ans);
-    return 0;
-}
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1e5 + 50;
+int l[N], r[N];
+int main()
+{
+    int n;
+    scanf("%d", &n);
+    for (int i = 1; i <= n; i++)
+        scanf("%d%d", l + i, r + i);
+    int L = *min_element(l + 1, l + n + 1);
+    int R = *max_element(r + 1, r + n + 1);
+    int ans = -1;
+    for (int i = 1; i <= n; i++)
+        if (l[i] == L && r[i] == R)
+            ans = i;
+    printf("%d", ans);
+    return 0;
+}
diff --git a/1224/P02.cpp b/20181224/P02.cpp
similarity index 96%
rename from 1224/P02.cpp
rename to 20181224/P02.cpp
index 3929cf1..4333afe 100644
--- a/1224/P02.cpp
+++ b/20181224/P02.cpp
@@ -1,22 +1,22 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-const int N = 55;
-int a1[N], a2[N], b[N], d[N];
-int main()
-{
-    int n;
-    scanf("%d", &n);
-    for (int i = 1; i < n; i++)
-        scanf("%d", a1 + i), a1[i] += a1[i - 1];
-    for (int i = 1; i < n; i++)
-        scanf("%d", a2 + i), a2[i] += a2[i - 1];
-    for (int i = 0; i < n; i++)
-        scanf("%d", b + i);
-    for (int i = 0; i < n; i++)
-        d[i] = a1[i] + b[i] + (a2[n - 1] - a2[i]);
-    sort(d, d + n);
-    printf("%d", d[0] + d[1]);
-    return 0;
-}
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 55;
+int a1[N], a2[N], b[N], d[N];
+int main()
+{
+    int n;
+    scanf("%d", &n);
+    for (int i = 1; i < n; i++)
+        scanf("%d", a1 + i), a1[i] += a1[i - 1];
+    for (int i = 1; i < n; i++)
+        scanf("%d", a2 + i), a2[i] += a2[i - 1];
+    for (int i = 0; i < n; i++)
+        scanf("%d", b + i);
+    for (int i = 0; i < n; i++)
+        d[i] = a1[i] + b[i] + (a2[n - 1] - a2[i]);
+    sort(d, d + n);
+    printf("%d", d[0] + d[1]);
+    return 0;
+}
diff --git a/1224/P03.cpp b/20181224/P03.cpp
similarity index 96%
rename from 1224/P03.cpp
rename to 20181224/P03.cpp
index 1257ba3..4ca7145 100644
--- a/1224/P03.cpp
+++ b/20181224/P03.cpp
@@ -1,30 +1,30 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-const int N = 1 << 20;
-char buf[N];
-int diff[N];
-int calc(char a, char b)
-{
-    if (a > b) swap(a, b);
-    return min(b - a, a + 26 - b);
-}
-int main()
-{
-    int n, p;
-    scanf("%d%d%s", &n, &p, buf);
-    p--;
-    if (p >= (n >> 1)) p = n - p - 1, reverse(buf, buf + n);
-    for (int i = 0; i < (n >> 1); i++) diff[i] = calc(buf[i], buf[n - i - 1]);
-    int L = p, R = p;
-    for (int i = p; i >= 0; i--)
-        if (diff[i]) L = i;
-    for (int i = p; i < (n >> 1); i++)
-        if (diff[i]) R = i;
-    int base_ans = accumulate(diff + L, diff + R + 1, 0);
-    if (L == p) return printf("%d", base_ans + R - p), 0;
-    if (R == p) return printf("%d", base_ans + p - L), 0;
-    printf("%d", base_ans + R - L + min(R - p, p - L));
-    return 0;
-}
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1 << 20;
+char buf[N];
+int diff[N];
+int calc(char a, char b)
+{
+    if (a > b) swap(a, b);
+    return min(b - a, a + 26 - b);
+}
+int main()
+{
+    int n, p;
+    scanf("%d%d%s", &n, &p, buf);
+    p--;
+    if (p >= (n >> 1)) p = n - p - 1, reverse(buf, buf + n);
+    for (int i = 0; i < (n >> 1); i++) diff[i] = calc(buf[i], buf[n - i - 1]);
+    int L = p, R = p;
+    for (int i = p; i >= 0; i--)
+        if (diff[i]) L = i;
+    for (int i = p; i < (n >> 1); i++)
+        if (diff[i]) R = i;
+    int base_ans = accumulate(diff + L, diff + R + 1, 0);
+    if (L == p) return printf("%d", base_ans + R - p), 0;
+    if (R == p) return printf("%d", base_ans + p - L), 0;
+    printf("%d", base_ans + R - L + min(R - p, p - L));
+    return 0;
+}
diff --git a/1224/P04.cpp b/20181224/P04.cpp
similarity index 96%
rename from 1224/P04.cpp
rename to 20181224/P04.cpp
index 39078c9..af90ea9 100644
--- a/1224/P04.cpp
+++ b/20181224/P04.cpp
@@ -1,21 +1,21 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-const int N = 1 << 20;
-char buf[N];
-int main()
-{
-    scanf("%s", buf);
-    int len = strlen(buf);
-    bool flag = false;
-    putchar(buf[0]);
-    for (int i = 1; i < len;)
-        if (memcmp(buf + i, "dot", 3) == 0 && i + 3 < len)
-            putchar('.'), i += 3;
-        else if (!flag && memcmp(buf + i, "at", 2) == 0 && i + 2 < len)
-            putchar('@'), i += 2, flag = true;
-        else
-            putchar(buf[i]), i++;
-    return 0;
-}
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1 << 20;
+char buf[N];
+int main()
+{
+    scanf("%s", buf);
+    int len = strlen(buf);
+    bool flag = false;
+    putchar(buf[0]);
+    for (int i = 1; i < len;)
+        if (memcmp(buf + i, "dot", 3) == 0 && i + 3 < len)
+            putchar('.'), i += 3;
+        else if (!flag && memcmp(buf + i, "at", 2) == 0 && i + 2 < len)
+            putchar('@'), i += 2, flag = true;
+        else
+            putchar(buf[i]), i++;
+    return 0;
+}
diff --git a/1224/P05.cpp b/20181224/P05.cpp
similarity index 95%
rename from 1224/P05.cpp
rename to 20181224/P05.cpp
index 4b3d7e6..a1d2e49 100644
--- a/1224/P05.cpp
+++ b/20181224/P05.cpp
@@ -1,29 +1,29 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-const int N = 1 << 10;
-int w[N], b[N];
-int p[N];
-bool u[N];
-int main()
-{
-    int n, m;
-    scanf("%d%d", &n, &m);
-    for (int i = 1; i <= n; i++)
-        scanf("%d", w + i);
-    for (int i = 1; i <= m; i++)
-        scanf("%d", b + i);
-    memset(p, 0, sizeof(p));
-    long long ans = 0;
-    for (int i = 1; i <= m; i++)
-    {
-        memset(u, 0, sizeof(u));
-        for (int j = p[b[i]] + 1; j < i; j++)
-            if (!u[b[j]])
-                ans += w[b[j]], u[b[j]] = true;
-        p[b[i]] = i;
-    }
-    printf("%lld", ans);
-    return 0;
-}
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1 << 10;
+int w[N], b[N];
+int p[N];
+bool u[N];
+int main()
+{
+    int n, m;
+    scanf("%d%d", &n, &m);
+    for (int i = 1; i <= n; i++)
+        scanf("%d", w + i);
+    for (int i = 1; i <= m; i++)
+        scanf("%d", b + i);
+    memset(p, 0, sizeof(p));
+    long long ans = 0;
+    for (int i = 1; i <= m; i++)
+    {
+        memset(u, 0, sizeof(u));
+        for (int j = p[b[i]] + 1; j < i; j++)
+            if (!u[b[j]])
+                ans += w[b[j]], u[b[j]] = true;
+        p[b[i]] = i;
+    }
+    printf("%lld", ans);
+    return 0;
+}
diff --git a/TmplPatch_2019Nanjing/proof_of_inv_table.md b/TmplPatch_2019Nanjing/proof_of_inv_table.md
deleted file mode 100644
index 2613716..0000000
--- a/TmplPatch_2019Nanjing/proof_of_inv_table.md
+++ /dev/null
@@ -1,15 +0,0 @@
-```cpp
-invT[1] = 1;
-for (int i = 2; i < N; i++)
-  invT[i] = (mod - mod / i) * invT[mod % i] % mod;
-```
-
-$$
-p=ax+b \\
-ax+b \equiv 0 \pmod p\\
-ab^{-1}+x^{-1} \equiv 0 \pmod p \\
-x^{-1} \equiv -ab^{-1} \pmod p \\
-x^{-1} \equiv -\left \lfloor \frac{p}{x} \right \rfloor (p\bmod x)^{-1} \pmod p \\
-x^{-1} \equiv (p-p/x) (p\bmod x)^{-1} \pmod p \\
-$$
-
diff --git a/java/1.java b/java/1.java
deleted file mode 100644
index 67b73a7..0000000
--- a/java/1.java
+++ /dev/null
@@ -1,20 +0,0 @@
-import java.io.PrintStream;
-import java.math.BigInteger;
-import java.util.Scanner;
-import java.util.StringTokenizer;
-
-class Main {
-    public static void main(String[] argv) {
-        String sp = System.getProperty("line.separator");
-        PrintStream cout = System.out;
-        try (Scanner cin = new Scanner(System.in)) {
-            int T = cin.nextInt();
-            for (int t = 1; t <= T; t++) {
-                BigInteger ba = cin.nextBigInteger(), bb = cin.nextBigInteger();
-                cout.printf("Case %d:%s%s + %s = %s%s", t, sp, ba, bb, ba.add(bb), sp);
-                if (t != T)
-                    cout.println();
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/nw/sock/client.py b/nw/sock/client.py
deleted file mode 100644
index 8a0ee7c..0000000
--- a/nw/sock/client.py
+++ /dev/null
@@ -1,11 +0,0 @@
-from socket import *
-from struct import *
-
-while True:
-    st = input(">>> ")
-    s = socket(AF_INET, SOCK_STREAM)
-    s.connect(("127.0.0.1", 8888))
-    s.sendall(pack("!i", len(st.encode())))
-    s.sendall(st.encode())
-    print(s.recv(len(st)).decode())
-    s.close()
\ No newline at end of file
diff --git a/nw/sock/server.py b/nw/sock/server.py
deleted file mode 100644
index 7b829f1..0000000
--- a/nw/sock/server.py
+++ /dev/null
@@ -1,18 +0,0 @@
-from socket import *
-from struct import *
-from threading import *
-s = socket(AF_INET, SOCK_STREAM)
-s.bind(('', 8888))
-s.listen(100)
-
-
-def proc(cs):
-    msglen = unpack("!i", cs.recv(4))[0]
-    msg = cs.recv(msglen)
-    cs.sendall(msg.decode().upper().encode())
-
-
-while True:
-    (cs, addr) = s.accept()
-    # Thread(None, proc, args=(cs, )).start()
-    proc(cs)
diff --git a/str/presentation.pdf b/str/presentation.pdf
deleted file mode 100644
index 6122d89..0000000
Binary files a/str/presentation.pdf and /dev/null differ
diff --git a/tmp/1.cpp b/tmp/1.cpp
deleted file mode 100644
index c2a5bea..0000000
--- a/tmp/1.cpp
+++ /dev/null
@@ -1,25 +0,0 @@
-#include <bits/stdc++.h>
-using namespace std;
-uint8_t encode[48] = {
-    0x96, 0x62, 0x53, 0x43, 0x6D, 0xF2, 0x8F, 0xBC,
-    0x16, 0xEE, 0x30, 0x05, 0x78, 0x00, 0x01, 0x52,
-    0xEC, 0x08, 0x5F, 0x93, 0xEA, 0xB5, 0xC0, 0x4D,
-    0x50, 0xF4, 0x53, 0xD8, 0xAF, 0x90, 0x2B, 0x34,
-    0x81, 0x36, 0x2C, 0xAA, 0xBC, 0x0E, 0x25, 0x8B,
-    0xE4, 0x8A, 0xC6, 0xA2, 0x81, 0x9F, 0x75, 0x55};
-int main()
-{
-    for (int j = 0; j < 6; j++)
-    {
-        uint64_t x = *(uint64_t *)&encode[j << 3];
-        for (int i = 0; i < 64; i++)
-            if (x & 1)
-                x = (x ^ 0xB0004B7679FA26B3uLL) >> 1 | (1ll << 63);
-            else
-                x >>= 1;
-        char *pt = (char *)&x;
-        for (int i = 0; i < 8; i++)
-            putchar(pt[i]);
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/tmp/2.cpp b/tmp/2.cpp
deleted file mode 100644
index 1b95088..0000000
--- a/tmp/2.cpp
+++ /dev/null
@@ -1,71 +0,0 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-#define CRP(t, x) const t &x
-#define OPX(op, t, x) operator op(CRP(t, x))
-#define OPL(t, x) bool OPX(<, t, x) const
-#define FIL(x, v) memset(x, v, sizeof(x))
-#define CLR(x) FIL(x, 0)
-#define NE1(x) FIL(x, -1)
-#define INF(x) FIL(x, 0x3f)
-#ifndef _DEBUG
-#define _DEBUG 0
-#endif // !_DEBUG
-#define IFD if (_DEBUG)
-typedef int64_t ll, i64;
-typedef uint64_t ull, u64;
-template <typename T>
-using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
-template <typename T>
-using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
-inline char getchar(int)
-{
-    static char buf[64 << 20], *S = buf, *T = buf;
-    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + S;
-    return S == T ? EOF : *S++;
-}
-template <typename T, typename = enable_if_integral<T>>
-inline void read(T &x)
-{
-    int ch = x = 0, f = 1;
-    while (!isdigit(ch = getchar()))
-        if (ch == '-') f = -1;
-    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
-    x *= f;
-}
-template <typename T, typename... Args, typename = enable_if_integral<T>>
-inline void read(T &x, Args &... args) { read(x), read(args...); }
-ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
-ll fpow(ll a, ll b, ll m)
-{
-    ll r = 1;
-    for (; b; b >>= 1, a = a * a % m)
-        if (b & 1) r = r * a % m;
-    return r;
-}
-constexpr double eps = 1e-8;
-inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
-const int N = 2e6 + 50;
-char strs[6][N];
-char *ptrs[6];
-char harbin[] = "harbin";
-int main()
-{
-    int T, n, k;
-    read(T);
-    while (T--)
-    {
-        for (int i = 0; i < 6; i++) scanf("%s", ptrs[i] = strs[i]);
-        bool flag = false;
-        do
-        {
-            bool flag2 = true;
-            for (int i = 0; i < 6 && flag2; i++)
-                flag2 = flag2 && (strchr(ptrs[i], harbin[i]) != NULL);
-            flag = flag || flag2;
-        } while (next_permutation(ptrs, ptrs + 6));
-        puts(flag ? "Yes" : "No");
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/tmp/3.cpp b/tmp/3.cpp
deleted file mode 100644
index 8eccb18..0000000
--- a/tmp/3.cpp
+++ /dev/null
@@ -1,124 +0,0 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-#include <ext/pb_ds/assoc_container.hpp>
-#include <ext/pb_ds/hash_policy.hpp>
-#include <ext/pb_ds/tree_policy.hpp>
-using namespace std;
-#define CRP(t, x) const t &x
-#define OPX(op, t, x) operator op(CRP(t, x))
-#define OPL(t, x) bool OPX(<, t, x) const
-#define FIL(x, v) memset(x, v, sizeof(x))
-#define CLR(x) FIL(x, 0)
-#define NE1(x) FIL(x, -1)
-#define INF(x) FIL(x, 0x3f)
-#ifndef _DEBUG
-#define _DEBUG 0
-#endif // !_DEBUG
-#define IFD if (_DEBUG)
-typedef int64_t ll, i64;
-typedef uint64_t ull, u64;
-template <typename T>
-using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
-template <typename T>
-using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
-inline char getchar(int)
-{
-    static char buf[64 << 20], *S = buf, *T = buf;
-    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + S;
-    return S == T ? EOF : *S++;
-}
-template <typename T, typename = enable_if_integral<T>>
-inline void read(T &x)
-{
-    int ch = x = 0, f = 1;
-    while (!isdigit(ch = getchar()))
-        if (ch == '-') f = -1;
-    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
-    x *= f;
-}
-template <typename T, typename... Args, typename = enable_if_integral<T>>
-inline void read(T &x, Args &... args) { read(x), read(args...); }
-ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
-ll fpow(ll a, ll b, ll m)
-{
-    ll r = 1;
-    for (; b; b >>= 1, a = a * a % m)
-        if (b & 1) r = r * a % m;
-    return r;
-}
-constexpr double eps = 1e-8;
-inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
-const int N = 1e6 + 50;
-//__gnu_pbds::gp_hash_table<ll, ll> mps[N];
-//map<ll, ll> mps[N];
-//__gnu_pbds::tree<ll, ll, less<ll>, __gnu_pbds::ov_tree_tag> mps[N];
-vector<ll> mps[N];
-pair<ll, ll> ch[N];
-ll cnt[N];
-int ops[N];
-int main()
-{
-    int T, n, op;
-    read(T);
-    while (T--)
-    {
-        read(n);
-        for (int i = 1; i <= n; i++)
-        {
-            auto &&curMap = mps[i];
-            cnt[i] = 0;
-            read(op);
-            ops[i] = op;
-            if (op == 1)
-            {
-                curMap.clear();
-                int k, x;
-                read(k);
-                while (k--) read(x), curMap.push_back(x);
-            }
-            if (op == 2)
-            {
-                int x, y;
-                read(x, y);
-                ch[i] = {x, y};
-            }
-        }
-        cnt[n] = 1;
-        for (int i = n; i; i--)
-            if (ops[i] == 2) cnt[ch[i].first] += cnt[i], cnt[ch[i].second] += cnt[i];
-        /*map<ll, ll> endMap;
-        for (int i = n; i; i--)
-            if (ops[i] == 1)
-                for (auto &&p : mps[i])
-                    endMap[p] += cnt[i];
-        pair<ll, ll> mx = {0, 0};
-        ll len = 0, ans = 0;
-        for (auto &&p : endMap) mx = max(mx, {p.second, p.first}), len += p.second;*/
-        ll mx = 0, mxcnt = 0, len = 0;
-        for (int i = 1; i <= n; i++)
-            if (ops[i] == 1 && cnt[i])
-                for (auto j : mps[i])
-                {
-                    if (mx == 0)
-                        mx = j, mxcnt += cnt[i];
-                    else if (mx == j)
-                        mxcnt += cnt[i];
-                    else
-                    {
-                        if (cnt[i] > mxcnt)
-                            mx = j, mxcnt = cnt[i] - mxcnt;
-                        else
-                            mxcnt -= cnt[i];
-                    }
-                    len += cnt[i];
-                }
-        ll tot = 0;
-        for (int i = 1; i <= n; i++)
-            if (ops[i] == 1 && cnt[i])
-                for (auto j : mps[i])
-                    if (j == mx) tot += cnt[i];
-        printf("%lld\n", (tot << 1) <= len ? len : (len - tot) << 1);
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/tmp/K.cpp b/tmp/K.cpp
deleted file mode 100644
index 4a3594e..0000000
--- a/tmp/K.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-#define CRP(t, x) const t &x
-#define OPX(op, t, x) operator op(CRP(t, x))
-#define OPL(t, x) bool OPX(<, t, x) const
-#define FIL(x, v) memset(x, v, sizeof(x))
-#define CLR(x) FIL(x, 0)
-#define NE1(x) FIL(x, -1)
-#define INF(x) FIL(x, 0x3f)
-#ifndef _DEBUG
-#define _DEBUG 0
-#endif // !_DEBUG
-#define IFD if (_DEBUG)
-typedef long long ll, i64;
-
-constexpr double eps = 1e-8;
-int sgn(double x)
-{
-    if (x > eps)
-        return 1;
-    if (x < -eps)
-        return -1;
-    return 0;
-}
-template <typename T>
-using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
-template <typename T>
-using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
-template <typename T, typename = enable_if_arithmetic<T>>
-struct Point
-{
-    T x, y;
-    Point OPX(-, Point, rhs) const { return {x - rhs.x, y - rhs.y}; }
-    T OPX(*, Point, rhs) const { return x * rhs.x + y * rhs.y; }
-    T OPX (^, Point, rhs) const { return x * rhs.y - y * rhs.x; }
-    T len2() const { return x * x + y * y; }
-    double len() const { return sqrt(len2()); }
-};
-template <typename T>
-struct Line
-{
-    Point<T> s, e;
-    T len2() const { return (s - e).len2(); }
-    double len() const { return (s - e).len(); }
-    bool contains(CRP(Point<T>, p)) const { return sgn((s - p) ^ (e - p)) == 0 && sgn((s - p) * (e - p)) <= 0; }
-};
-#define Point Point<double>
-#define Line Line<double>
-double area(CRP(Point, p1), CRP(Point, p2), CRP(Point, p3))
-{
-    return abs((p3 - p1) ^ (p2 - p1));
-}
-int main2()
-{
-    Point p[3], e;
-    while (~scanf("%lf%lf%lf%lf%lf%lf%lf%lf", &p[0].x, &p[0].y, &p[1].x, &p[1].y, &p[2].x, &p[2].y, &e.x, &e.y))
-    {
-        Line ls[3] = {{p[1], p[2]}, {p[0], p[2]}, {p[0], p[1]}};
-        bool flag = true;
-        for (int i = 0; i < 3 && flag; i++)
-            if (ls[i].contains(e))
-            {
-                int l = (i + 2) % 3, r = (i + 1) % 3;
-                int near = (e - p[l]).len2() < (e - p[r]).len2() ? l : r;
-                int other = l + r - near;
-                double len = ls[i].len() * ls[near].len() / 2 / (e - p[other]).len();
-                double fulllen = ls[near].len();
-                Point dif = p[i] - p[other];
-                printf("%.12lf %.12lf\n", p[other].x + dif.x * len / fulllen, p[other].y + dif.y * len / fulllen);
-                if (sgn(area(p[other], e, {p[other].x + dif.x * len / fulllen, p[other].y + dif.y * len / fulllen}) * 2 - area(p[0], p[1], p[2])))
-                    return -1;
-                flag = false;
-            }
-        if (flag)
-            puts("-1");
-    }
-    return 0;
-}
-int main()
-{
-    Point p[3], e;
-    while (~scanf("%lf%lf%lf%lf%lf%lf%lf%lf", &p[0].x, &p[0].y, &p[1].x, &p[1].y, &p[2].x, &p[2].y, &e.x, &e.y))
-    {
-        Line ls[3] = {{p[1], p[2]}, {p[0], p[2]}, {p[0], p[1]}};
-        bool flag = true;
-        for (int i = 0; i < 3 && flag; i++)
-            if (ls[i].contains(e))
-            {
-                int l = (i + 2) % 3, r = (i + 1) % 3;
-                int near = (e - p[l]).len2() < (e - p[r]).len2() ? l : r;
-                int other = l + r - near;
-                double len = sqrt(ls[i].len2() * ls[near].len2() / 4 / (e - p[other]).len2());
-                double fulllen = ls[near].len();
-                Point dif = p[i] - p[other];
-                printf("%.12lf %.12lf\n", p[other].x + dif.x * len / fulllen, p[other].y + dif.y * len / fulllen);
-                if (sgn(area(p[other], e, {p[other].x + dif.x * len / fulllen, p[other].y + dif.y * len / fulllen}) * 2 - area(p[0], p[1], p[2])))
-                    return -1;
-                flag = false;
-            }
-        if (flag)
-            puts("-1");
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/tmp/s01.cpp b/tmp/s01.cpp
deleted file mode 100644
index 8a24859..0000000
--- a/tmp/s01.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-#define _CRT_SECURE_NO_WARNINGS
-#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
-#include <bits/stdc++.h>
-using namespace std;
-#define CRP(t, x) const t &x
-#define OPX(op, t, x) operator op(CRP(t, x))
-#define OPL(t, x) bool OPX(<, t, x) const
-#define FIL(x, v) memset(x, v, sizeof(x))
-#define CLR(x) FIL(x, 0)
-#define NE1(x) FIL(x, -1)
-#define INF(x) FIL(x, 0x3f)
-#ifndef _DEBUG
-#define _DEBUG 0
-#endif // !_DEBUG
-#define IFD if (_DEBUG)
-typedef int64_t ll, i64;
-typedef uint64_t ull, u64;
-template <typename T>
-using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
-template <typename T>
-using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
-inline char getchar(int)
-{
-    static char buf[64 << 20], *S = buf, *T = buf;
-    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + S;
-    return S == T ? EOF : *S++;
-}
-template <typename T, typename = enable_if_integral<T>>
-inline void read(T &x)
-{
-    int ch = x = 0, f = 1;
-    while (!isdigit(ch = getchar()))
-        if (ch == '-') f = -1;
-    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
-    x *= f;
-}
-template <typename T, typename... Args, typename = enable_if_integral<T>>
-inline void read(T &x, Args &... args) { read(x), read(args...); }
-ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
-ll fpow(ll a, ll b, ll m)
-{
-    ll r = 1;
-    for (; b; b >>= 1, a = a * a % m)
-        if (b & 1) r = r * a % m;
-    return r;
-}
-constexpr double eps = 1e-8;
-inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
-const int N = 1e4 + 50;
-int minfac[N], primes[N], pcnt;
-int main()
-{
-    for (ll i = 2; i < N; i++)
-    {
-        if (minfac[i] == 0)
-            minfac[i] = i, primes[pcnt++] = i;
-        for (int j = 0; j < pcnt && primes[j] <= minfac[i] && i * primes[j] < N; j++)
-            minfac[i * primes[j]] = primes[j];
-    }
-    return 0;
-}
\ No newline at end of file
diff --git a/tmp/test1.ipynb b/tmp/test1.ipynb
deleted file mode 100644
index fe40569..0000000
--- a/tmp/test1.ipynb
+++ /dev/null
@@ -1,49 +0,0 @@
-{
- "nbformat": 4,
- "nbformat_minor": 2,
- "metadata": {
-  "language_info": {
-   "name": "python",
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   }
-  },
-  "orig_nbformat": 2,
-  "file_extension": ".py",
-  "mimetype": "text/x-python",
-  "name": "python",
-  "npconvert_exporter": "python",
-  "pygments_lexer": "ipython3",
-  "version": 3
- },
- "cells": [
-  {
-   "cell_type": "code",
-   "execution_count": 11,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import numpy as np"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 14,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": "array([[0., 0., 0.],\n       [0., 0., 0.],\n       [0., 0., 0.],\n       [0., 0., 0.],\n       [0., 0., 0.]])"
-     },
-     "execution_count": 14,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "np.zeros((5,3))"
-   ]
-  }
- ]
-}
\ No newline at end of file
diff --git a/tmpl2020/Graph.cpp b/tmpl2020/Graph.cpp
deleted file mode 100644
index a047e36..0000000
--- a/tmpl2020/Graph.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-template <size_t N, size_t M = N>
-struct Graph
-{
-    // Basic
-    struct Edge
-    {
-        int nxt, to, len;
-    };
-    int adj[N], ecnt;
-    Edge E[M];
-    void addEdge(int f, int t, int l)
-    {
-        E[++ecnt] = {adj[f], t, l};
-        adj[f] = ecnt;
-    }
-    // Dijkstra
-
-    // ISAP
-};
\ No newline at end of file