CSES - Shared codeLink to this code: https://cses.fi/paste/c63f02b96710bdd1164250/
#include <bits/stdc++.h>
using namespace std;

const int MOD = 1e9 + 7;
const int N = 1e6 + 1;

int a[100];

int main() {
  int n, x, i, j;
  cin >> n >> x;
  int dp[n + 1][x + 1];
  for(j = 0; j < n; j++) cin >> a[j];
  for(j = 0; j <= n; j++) for(i = 0; i <= x; i++) dp[j][i] = 0;
  
  for(j = 0; j <= n; j++) dp[j][0] = 1;

  for(i = 1; i <= x; i++) {
    for(j = 0; j < n; j++) {
      dp[j + 1][i] = dp[j][i];
      if(i - a[j] >= 0) (dp[j + 1][i] += dp[j + 1][i - a[j]]) %= MOD;
    }
  }
  cout << dp[n][x];
}