func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1000000007;   long long dp[1010][1010], sum[1010];   int main() {     memset(dp, 0, sizeof(dp));     int n, m, r;     cin >> n >> m >> r;     for (int i = 0; i <= 1000; i++) dp[0][i] = 1;     for (int i = 1; i <= r; i++) {       memset(sum, 0, sizeof(sum));       for (int j = 3; j <= 1000; j++) {         sum[j] = (sum[j - 1] + dp[i - 1][j - 2]) % mod;         dp[i][j] = (dp[i][j - 1] + sum[j]) % mod;       }     }     cout << dp[r][n] * dp[r][m] % mod << endl;     return 0;   }   