func_code_string: #include <bits/stdc++.h>   const int MAXN = 210;   const int mod = 1e9 + 7;   void reduce(int& x) { x += x >> 31 & mod; }   int mul(int x, int y) { return (long long)x * y % mod; }   void fma(int& x, int y, int z) { x = ((long long)y * z + x) % mod; }   struct vec {     int x, y;     vec() { x = y = 0; }     vec(int a, int b) { x = a, y = b; }     vec operator+(vec b) const { return vec(x + b.x, y + b.y); }     vec operator-(vec b) const { return vec(x - b.x, y - b.y); }     long long operator^(vec b) const {       return (long long)x * b.y - (long long)y * b.x;     }     long long operator*(vec b) const {       return (long long)x * b.x + (long long)y * b.y;     }     bool operator==(vec b) const { return x == b.x && y == b.y; }   } ps[MAXN];   int n;   long long cross(vec x, vec y, vec z) { return (y - x) ^ (z - x); }   inline int sgn(long long x) { return x < 0 ? -1 : x > 0; }   int dp[MAXN][MAXN];   int main() {     std::ios_base::sync_with_stdio(false), std::cin.tie(0);     std::cin >> n;     for (int i = 1; i <= n; ++i) std::cin >> ps[i].x >> ps[i].y;     long long area = 0;     for (int i = 1; i <= n; ++i) area += ps[i] ^ ps[i == n ? 1 : i + 1];     for (int i = 1; i < n; ++i) dp[i][i + 1] = 1;     for (int L = 3; L <= n; ++L)       for (int l = 1; l + L - 1 <= n; ++l) {         int r = l + L - 1;         for (int p = l + 1; p < r; ++p)           if (sgn(cross(ps[p], ps[r], ps[l])) == sgn(area))             fma(dp[l][r], dp[l][p], dp[p][r]);       }     std::cout << dp[1][n] << std::endl;     return 0;   }   