func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e3 + 5, mod = 1e9 + 7;   int n, m, k;   long long fact[maxn], dp[maxn], inv[maxn];   long long qpow(long long n, int p) {     long long res = 1;     while (p) {       if (p & 1) res = res * n % mod;       n = n * n % mod;       p >>= 1;     }     return res;   }   long long COM(int n, int m) {     if (m > n) return 0;     return fact[n] * inv[m] % mod * inv[n - m] % mod;   }   int main() {     scanf( %d%d%d , &n, &m, &k);     fact[0] = 1;     for (int i = 1; i < maxn; ++i) fact[i] = fact[i - 1] * i % mod;     inv[maxn - 1] = qpow(fact[maxn - 1], mod - 2);     for (int i = maxn - 2; i >= 0; --i) inv[i] = inv[i + 1] * (i + 1) % mod;     printf( %lld n , COM(n - 1, k << 1) * COM(m - 1, k << 1) % mod);   }   