func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   int const N = 222;   int const M = 1e9 + 7;   int n;   ll f[N][N];   struct point {     ll x, y;     point(ll _x = 0, ll _y = 0) : x(_x), y(_y) {}     ll operator*(const point &rhs) const { return x * rhs.y - y * rhs.x; }     point operator-(const point &rhs) const {       return point(x - rhs.x, y - rhs.y);     }   } p[N];   int main() {     scanf( %d , &n);     for (int i = 0; i < n; ++i) scanf( %I64d%I64d , &p[i].x, &p[i].y);     ll area = 0;     for (int i = 1; i + 1 < n; ++i) area += (p[i] - p[0]) * (p[i + 1] - p[0]);     if (area < 0) reverse(p, p + n);     for (int i = 0; i < n; ++i) f[i][i] = f[i][(i + 1) % n] = 1;     for (int step = 2; step < n; ++step)       for (int i = 0; i < n; ++i) {         int j = (i + step) % n;         for (int t = 1; t <= step - 1; ++t) {           int k = (i + t) % n;           if ((p[k] - p[i]) * (p[j] - p[i]) > 0) {             f[i][j] = (f[i][j] + f[i][k] * f[k][j]) % M;           }         }       }     printf( %I64d n , f[0][n - 1]);     return 0;   }   