Sat, 02 Nov 2019 17:01:41 GMT

.vscode/launch.json

@@ -0,0 +1,29 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "g++.exe build and debug active file",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "miDebuggerPath": "D:\\Programs\\MSYS2\\mingw64\\bin\\gdb.exe",
+            "setupCommands": [
+                {
+                    "description": "为 gdb 启用整齐打印",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "g++.exe build active file"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+    "files.exclude": {
+        "**/.classpath": true,
+        "**/.project": true,
+        "**/.settings": true,
+        "**/.factorypath": true
+    }
+}

.vscode/tasks.json

@@ -0,0 +1,19 @@
+{
+    "tasks": [
+        {
+            "type": "shell",
+            "label": "g++.exe build active file",
+            "command": "D:\\Programs\\MSYS2\\mingw64\\bin\\g++.exe",
+            "args": [
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "D:\\Programs\\MSYS2\\mingw64\\bin"
+            }
+        }
+    ],
+    "version": "2.0.0"
+}

C339575/I.cpp

@@ -3,7 +3,8 @@
 #include <bits/stdc++.h>
 using namespace std;
 #define CRP(t, x) const t &x
-#define OPL(t, x) bool operator<(CRP(t, x)) const
+#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)
@@ -14,27 +15,73 @@ using namespace std;
 #define IFD if (_DEBUG)
 typedef int64_t ll, i64;
 typedef uint64_t ull, u64;
-const int N = 1005 * 1005;
-const double eps = 1e-8;
-int a[1605], x[45];
+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 bool read(T &x)
+{
+    int ch = x = 0, f = 1;
+    while (!isdigit(ch = getchar()))
+    {
+        if (ch == EOF) return false;
+        if (ch == '-') f = -1;
+    }
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    x *= f;
+    return true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return 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 = 1e5 + 50;
+ull base[N], hs[N];
+inline ull get_hash(int l, int r)
+{
+    return hs[r] - hs[l] * base[r - l];
+}
+char s[N];
 int main()
 {
-    int T, n;
-    double p;
-    scanf("%d", &T);
-    while (T--)
+    for (int i = *base = 1; i < N; i++) base[i] = base[i - 1] * 131;
+    map<ull, int> M;
+    for (int m, l; ~scanf("%d%d%s", &m, &l, s);)
     {
-        scanf("%d%lf", &n, &p);
-        for (int i = 1; i <= n; i++)
-            cin >> x[i];
-        a[0] = 0;
-        int co = 1;
-        for (int i = 0; i <= n; i++)
-            for (int j = i + 1; j <= n; j++)
-                a[co++] = x[i] + x[j];
-        sort(a, a + co);
-        n = (1.0 - p < eps) ? n : (int)(p * pow(2, n));
-        cout << a[n - 1] << endl;
+        int n = strlen(s);
+        for (int i = 1; s[i - 1]; i++) hs[i] = hs[i - 1] * 131 + s[i - 1];
+        // for (int i = 0; i < n; i += 3) printf("%d\n", get_hash(i, i + 3));
+        int ans = 0;
+        for (int i = 0; i < l && i + m * l < n; i++)
+        {
+            M.clear();
+            for (int j = i; j < i + m * l; j += l) M[get_hash(j, j + l)]++;
+            if (M.size() == m) ans++;
+            for (int j = i + m * l; j + l <= n; j += l)
+            {
+                M[get_hash(j, j + l)]++;
+                ull x = get_hash(j - m * l, j - m * l + l);
+                M[x]--;
+                if (M[x] == 0) M.erase(x);
+                if (M.size() == m) ans++;
+            }
+        }
+        printf("%d\n", ans);
     }
     return 0;
-}
+}

hdu/1421.cpp

@@ -0,0 +1,90 @@
+#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 bool read(T &x)
+{
+    int ch = x = 0;
+    while (!isdigit(ch = getchar()))
+        if (ch == EOF) return false;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return 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 = 2050;
+ll a[N];
+int vis[N];
+struct pa
+{
+    int i, j;
+    ll v;
+    OPL(pa, rhs)
+    {
+        if (v > rhs.v) return true;
+        if (v < rhs.v) return false;
+        if (i > rhs.i) return true;
+        if (i < rhs.i) return false;
+        return j > rhs.j;
+    }
+};
+ll sq(ll x) { return x * x; }
+int main()
+{
+    for (int n, k, t = 1; read(n, k); t++)
+    {
+        for (int i = 0; i < n; i++) read(a[i]);
+        sort(a, a + n);
+        priority_queue<pa> H;
+        // for (int i = 0; i < n; i++)
+        //     for (int j = 0; j < i; j++)
+        //         H.push({i, j, sq(a[i] - a[j])});
+        for (int i = 1; i < n; i++)
+            H.push({i - 1, i, sq(a[i - 1] - a[i])});
+        ll ans = 0;
+        for (; k && !H.empty(); H.pop())
+        {
+            auto x = H.top();
+            if (vis[x.i] == t || vis[x.j] == t) continue;
+            ans += x.v;
+            vis[x.i] = vis[x.j] = t;
+            k--;
+        }
+        printf("%lld\n", ans);
+    }
+    return 0;
+}

tmpl.cpp

@@ -13,7 +13,39 @@ using namespace std;
 #define _DEBUG 0
 #endif // !_DEBUG
 #define IFD if (_DEBUG)
-typedef long long ll, i64;
+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; }
 int main()
 {