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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4.  
  5. #define ld long double
  6.  
  7. void solve() {
  8.     int n,y;
  9.     cin >> n >> y;
  10.  
  11.     vector<int>b(n);
  12.     for(int i=0;i<n;i++)cin>> b[i];
  13.  
  14.     int sum=accumulate(b.begin(),b.end(),0LL);
  15.     vector<vector<int>>dp(n+1,vector<int>(y+1));
  16.  
  17.     for (int i=0; i<=n; i++) dp[i][0] = 1;// 1 way-> not taking anything to make sum=0
  18.  
  19.     for(int i=1;i<=n;i++){
  20.         for(int j=1;j<=y;j++){
  21.             dp[i][j]=(j-b[i-1]>=0 ? dp[i-1][j-b[i-1]]:0)+dp[i-1][j];
  22.         }
  23.     }
  24.     cout<<dp[n][y]<<endl;
  25. }
  26.  
  27. int main() {
  28.     ios::sync_with_stdio(false);
  29.     cin.tie(nullptr);
  30.     solve();
  31.     return 0;
  32. }
Success #stdin #stdout 0.01s 5280KB
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stdin
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7 5
3 2 1 4 3 5 -2
stdout
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4
https://ideone.com/v9U2Z5
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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