diff --git a/Codeforces/1227C b/Codeforces/1227C
new file mode 100755
index 0000000..b32ef6d
Binary files /dev/null and b/Codeforces/1227C differ
diff --git a/Codeforces/1227C.cpp b/Codeforces/1227C.cpp
new file mode 100644
index 0000000..a17d1fe
--- /dev/null
+++ b/Codeforces/1227C.cpp
@@ -0,0 +1,93 @@
+#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... Types>
+using comtype = typename common_type<Types...>::type;
+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) + buf;
+    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;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return read(x) && read(args...); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmin(CRP(T1, v1), CRP(T2, v2)) { return min<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmin(CRP(T, v), const Args &... args) { return min<TResult>(v, mmin(args...)); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmax(CRP(T1, v1), CRP(T2, v2)) { return max<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline 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;
+char s[N], t[N];
+vector<pair<int, int>> v;
+int main()
+{
+    int T, n, k;
+    read(T);
+    while (T--)
+    {
+        v.clear();
+        read(n, k);
+        scanf("%s", s);
+        int sp = 0;
+        for (int i = 0; i < k - 1; i++) t[sp++] = '(', t[sp++] = ')';
+        for (int i = 0; i < (n >> 1) - k + 1; i++) t[sp++] = '(';
+        for (int i = 0; i < (n >> 1) - k + 1; i++) t[sp++] = ')';
+        for (int i = 0; i < n; i++)
+            if (s[i] != t[i])
+            {
+                auto po = strchr(s + i, t[i]);
+                reverse(s + i, po + 1);
+                v.push_back({i + 1, po - s + 1});
+            }
+        printf("%d\n", (int)v.size());
+        for (const auto &p : v) printf("%d %d\n", p.first, p.second);
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/Codeforces/1227D1 b/Codeforces/1227D1
new file mode 100755
index 0000000..dd20c00
Binary files /dev/null and b/Codeforces/1227D1 differ
diff --git a/Codeforces/1227D1.cpp b/Codeforces/1227D1.cpp
new file mode 100644
index 0000000..69efd31
--- /dev/null
+++ b/Codeforces/1227D1.cpp
@@ -0,0 +1,92 @@
+#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... Types>
+using comtype = typename common_type<Types...>::type;
+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) + buf;
+    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;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return read(x) && read(args...); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmin(CRP(T1, v1), CRP(T2, v2)) { return min<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmin(CRP(T, v), const Args &... args) { return min<TResult>(v, mmin(args...)); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmax(CRP(T1, v1), CRP(T2, v2)) { return max<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline 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 a[105], b[105];
+int main()
+{
+    int n, m, k, p;
+    read(n);
+    for (int i = 0; i < n; i++) read(a[i]);
+    memcpy(b, a, sizeof(int) * n);
+    sort(b, b + n, greater<int>());
+    read(m);
+    while (m--)
+    {
+        read(k, p);
+        int x = b[k - 1];
+        int gx = lower_bound(b, b + n, x, greater<int>()) - b;
+        for (int i = 0, j = 0, l = 0; i < n; i++)
+        {
+            if (a[i] > x) j++;
+            if (a[i] == x && l < k - gx) j++, l++;
+            if (j == p)
+            {
+                printf("%d\n", a[i]);
+                break;
+            }
+        }
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/Codeforces/1260C b/Codeforces/1260C
new file mode 100755
index 0000000..610ed8e
Binary files /dev/null and b/Codeforces/1260C differ
diff --git a/Codeforces/1260C.cpp b/Codeforces/1260C.cpp
new file mode 100644
index 0000000..eacb9fe
--- /dev/null
+++ b/Codeforces/1260C.cpp
@@ -0,0 +1,79 @@
+#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... Types>
+using comtype = typename common_type<Types...>::type;
+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) + buf;
+    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;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return read(x) && read(args...); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmin(CRP(T1, v1), CRP(T2, v2)) { return min<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmin(CRP(T, v), const Args &... args) { return min<TResult>(v, mmin(args...)); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmax(CRP(T1, v1), CRP(T2, v2)) { return max<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline 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()
+{
+    ll T, r, b, k;
+    read(T);
+    while (T--)
+    {
+        read(r, b, k);
+        ll g = gcd(r, b);
+        r /= g, b /= g;
+        if (r > b) swap(r, b);
+        puts((k - 1) * r + 1 < b ? "REBEL" : "OBEY");
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/hdu872/6734.cpp b/hdu872/6734.cpp
new file mode 100644
index 0000000..2e22379
--- /dev/null
+++ b/hdu872/6734.cpp
@@ -0,0 +1,28 @@
+#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 OPL(t, x) bool operator<(CRP(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;
+int main()
+{
+    int T, n;
+    scanf("%d", &T);
+    while (T--)
+    {
+        scanf("%d", &n);
+        while (n % 2 == 0) n /= 2;
+        while (n % 5 == 0) n /= 5;
+        puts(n > 1 ? "Yes" : "No");
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/hdu872/6736.cpp b/hdu872/6736.cpp
new file mode 100644
index 0000000..a091465
--- /dev/null
+++ b/hdu872/6736.cpp
@@ -0,0 +1,63 @@
+#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 OPL(t, x) bool operator<(CRP(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;
+ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
+constexpr ll mod = 998244353;
+ll fpow(ll a, ll b)
+{
+    ll r = 1;
+    for (; b; b >>= 1, a = a * a % mod)
+        if (b & 1)
+            r = r * a % mod;
+    return r;
+}
+ll fpow(ll a, ll b, ll m = mod)
+{
+    ll r = 1;
+    for (; b; b >>= 1, a = a * a % m)
+        if (b & 1)
+            r = r * a % m;
+    return r;
+}
+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>
+using isInt = typename enable_if<is_integral<T>::value>::type;
+template <typename T, typename = isInt<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 = isInt<T>>
+inline void read(T &x, Args &... args) { read(x), read(args...); }
+int main()
+{
+    int a, b, c, d;
+    double e;
+    read(a, b, c, d);
+    cout << a << endl;
+    cout << b << endl;
+    cout << c << endl;
+    cout << d << endl;
+    return 0;
+}
\ No newline at end of file