func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int gcd(long long int a, long long int b) {     if (a < b) swap(a, b);     if (b == 0)       return a;     else       gcd(b, a % b);   }   int main() {     long long int ncr[62][62];     for (long long int i = 0; i < 62; i++) {       ncr[i][0] = 1;       ncr[i][i] = 1;     }     for (long long int i = 1; i < 62; i++) {       for (long long int j = 1; j <= i; j++) {         ncr[i][j] = ncr[i - 1][j - 1] + ncr[i - 1][j];       }     }     long long int n, m, t, ans = 0;     cin >> n >> m >> t;     for (long long int i = 4; i <= t - 1; i++) {       ans += (ncr[n][i] * ncr[m][t - i]);     }     cout << ans << endl;   }   