func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxN = 502;   long long c[maxN][maxN];   long long a[maxN];   int n, m, b, md;   int main() {     cin >> n >> m >> b >> md;     for (int i = 1; i <= n; i++) cin >> a[i];     c[0][0] = 1;     for (int i = 1; i <= n; i++)       for (int j = 0; j < m; j++)         for (int t = 0; t <= b - a[i]; t++)           if (c[j][t] > 0) {             c[j + 1][t + a[i]] = (c[j + 1][t + a[i]] + c[j][t]) % md;           }     long long ans = 0;     for (int i = 0; i <= b; i++) ans = (ans + c[m][i]) % md;     cout << ans << endl;     return 0;   }   