func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD = 1000000007;   int N;   int X[206], Y[206];   int D[202][202];   long long area(int i1, int i2, int i3) {     return 1LL * X[i1] * Y[i2] + 1LL * X[i2] * Y[i3] + 1LL * X[i3] * Y[i1] -            1LL * Y[i1] * X[i2] - 1LL * Y[i2] * X[i3] - 1LL * Y[i3] * X[i1];   }   int sign(int i1, int i2, int i3) {     long long val = area(i1, i2, i3);     if (val < 0) return -1;     if (val > 0) return 1;     return 0;   }   bool inpoly(int x, int y) {     int pnx = 1e9 + 7, pny = 1e9 + 9;     X[N + 2] = x;     Y[N + 2] = y;     X[N + 3] = pnx;     Y[N + 3] = pny;     for (int i = 1; i <= N + 1; ++i) {       X[i] *= 2;       Y[i] *= 2;     }     int nn = 0;     for (int i = 1; i <= N; ++i)       if (sign(N + 2, N + 3, i) * sign(N + 2, N + 3, i + 1) == -1 &&           sign(i, i + 1, N + 2) * sign(i, i + 1, N + 3) == -1)         ++nn;     for (int i = 1; i <= N + 1; ++i) {       X[i] /= 2;       Y[i] /= 2;     }     return (nn % 2);   }   bool isok(int i1, int i2) {     if (i1 + 1 == i2 || (i2 == N && i1 == 1)) return true;     for (int i = 1; i <= N; ++i)       if (i != i1 && i != i2) {         if (X[i] < min(X[i1], X[i2]) || X[i] > max(X[i1], X[i2])) continue;         if (Y[i] < min(Y[i1], Y[i2]) || Y[i] > max(Y[i1], Y[i2])) continue;         if (1LL * (Y[i] - Y[i1]) * (X[i2] - X[i]) ==             1LL * (Y[i2] - Y[i]) * (X[i] - X[i1]))           return false;       }     for (int i = 1; i <= N; ++i)       if (i != i1 && i + 1 != i1 && (i + 1) % N != i1)         if (i != i2 && i + 1 != i2 && (i + 1) % N != i2) {           int p1 = i, p2 = i + 1;           if (sign(i1, i2, p1) * sign(i1, i2, p2) == -1 &&               sign(p1, p2, i1) * sign(p1, p2, i2) == -1)             return false;         }     int xn = X[i1] + X[i2];     int yn = Y[i1] + Y[i2];     if (!inpoly(xn, yn)) return false;     return true;   }   int ways(int i1, int i2) {     if (D[i1][i2] != -1) return D[i1][i2];     if (i1 + 1 == i2) return 1;     int& now = D[i1][i2];     now = 0;     if (!isok(i1, i2)) return now;     for (int k = i1 + 1; k <= i2 - 1; ++k)       now = (now + 1LL * ways(i1, k) * ways(k, i2)) % MOD;     return now;   }   int main() {     cin.sync_with_stdio(false);     cin >> N;     for (int i = 1; i <= N; ++i) cin >> X[i] >> Y[i];     X[N + 1] = X[1];     Y[N + 1] = Y[1];     memset(D, -1, sizeof(D));     cout << ways(1, N) <<   n ;   }   