func_code_string: #include <bits/stdc++.h>   using namespace std;   long long dp[55][55];   int main() {     int n, m, t;     cin >> n >> m >> t;     dp[0][0] = 1;     for (int i = 1; i <= 31; ++i)       for (int j = 1; j <= 31; ++j) dp[i][j] = dp[i - 1][j - 1] + dp[i - 1][j];     long long sol = 0;     for (int i = 4; i <= n; ++i)       for (int j = 1; j <= m; ++j)         if (i + j == t) {           sol = sol + dp[n + 1][i + 1] * dp[m + 1][j + 1];         }     cout << sol <<   n ;     return 0;   }   