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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define int long long
  4. signed main()
  5. {
  6.     ios_base::sync_with_stdio(false); cin.tie(0);
  7.     int n;
  8.     cin>>n;
  9.  
  10.  
  11.     int sum=0;
  12.     int l = 0;
  13.     vector<int> v(n,0);
  14.     for(auto x:v)
  15.     {
  16.         cin>>x;
  17.         sum+=x;
  18.         l=max(l,x);
  19.     }
  20.  
  21.  
  22.     vector<vector<int>> dp(n + 1, vector<int>(sum + 1, 0));
  23.  
  24.     dp[0][0] = 1; 
  25.  
  26.     for (int i = 1; i <= n; i++) {
  27.         int x = v[i - 1];
  28.         for (int s = 0; s <= sum; s++) {
  29.             // not take
  30.             dp[i][s] += dp[i - 1][s];
  31.  
  32.             // take
  33.             if (s >= x)
  34.                 dp[i][s] += dp[i - 1][s - x];
  35.         }
  36.     }
  37.  
  38.     // count sums >= x
  39.     int ans = 0;
  40.     for (int s = l; s <= sum; s++)
  41.         ans += dp[n][s];
  42.  
  43.     cout<<ans;
  44. }
Success #stdin #stdout 0s 5304KB
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stdin
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7 
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stdout
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Standard output is empty
https://ideone.com/8qDs5o
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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