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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const int W = 2e5 + 1;
  5. int cnt[W];
  6. int n, w;
  7.  
  8. int main()
  9. {
  10.     ios_base::sync_with_stdio(false);
  11.     cin.tie(0);
  12.     cin >> n >> w;
  13.     for (int i = 0; i < n; ++i) {
  14.         int x;
  15.         cin >> x;
  16.         ++cnt[x];
  17.     }
  18.     for (int i = 1; i <= w; ++i) {
  19.         auto carry = (cnt[i] - 1) / 2;
  20.         if (carry) {
  21.             cnt[2 * i] += carry;
  22.             cnt[i] -= 2 * carry;
  23.         }
  24.     }
  25.     bitset<W> knapsack = 1;
  26.     for (int i = 1; i <= w; ++i)
  27.         for (int j = 0; j < cnt[i]; ++j)
  28.             knapsack |= knapsack << i;
  29.     cout << (knapsack.test(w) ? "YES" : "NO");
  30. }
Success #stdin #stdout 0.01s 5424KB
comments (?)
stdin 
Standard input is empty
stdout 
YES
https://ideone.com/vCADJT
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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