func_code_string: #include <bits/stdc++.h>   using namespace std;   #pragma comment(linker,  /STACK:1000000000 )   static long long m1[70][70];   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     m1[0][0] = 1;     for (int i = 1; i <= 30; ++i) {       m1[i][0] = 1;       for (int j = 1; j <= 30; ++j) m1[i][j] = m1[i - 1][j - 1] + m1[i - 1][j];     }     long long n, m, t, r = 0;     cin >> n >> m >> t;     for (int i = 4; i < t; ++i)       if (t - i >= 0) r += m1[n][i] * m1[m][t - i];     cout << r << endl;     return 0;   }   