func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m, b, mod, a[509], dp[509][509], ans;   int main() {     cin >> n >> m >> b >> mod;     dp[0][0] = 1;     for (int i = 0; i < n; i++) cin >> a[i];     for (int i = 0; i < n; i++) {       for (int j = 1; j <= m; j++) {         for (int k = 0; k <= b - a[i]; k++) {           dp[j][k + a[i]] = (dp[j - 1][k] + dp[j][k + a[i]]) % mod;         }       }     }     for (int i = 0; i <= b; i++) ans += dp[m][i], ans %= mod;     cout << ans;   }   