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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6.     int n,r; cin >> n >> r;
  7.     vector<int> a(n);
  8.     int left=0,happy=0;
  9.     for(int i=0;i<n;++i) {
  10.         cin >> a[i];
  11.         r-=a[i]/2;
  12.         happy+=2*(a[i]/2);
  13.         if(a[i]&1!=0) {
  14.             ++left;
  15.         }
  16.     }
  17.     if(left>r) {
  18.         happy+=2*r-left;
  19.     }
  20.     else {
  21.         happy+=left;
  22.     }
  23.     cout << happy << "\n";
  24. 	return 0;
  25. }
Success #stdin #stdout 0.01s 5280KB
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stdin
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stdout
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6
https://ideone.com/cXh9um
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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