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  1. /*
  2.     Fr: pdtduong
  3.     Note: uoc gi AC (")> 
  4.     Wish: HSGS/PTNK 26-27
  5. */
  6. #include<bits/stdc++.h>
  7. using namespace std;
  8. #define int long long
  9. #define endl "\n"
  10. #define lcm(a, b) a*b/__gcd(a, b)
  11. #define fi first
  12. #define se second
  13. #define pb push_back
  14. #define YES cout << "YES\n";
  15. #define NO cout << "NO\n";
  16. const int maxn = 1e6+5, INF = 1e18;
  17. int n, k;
  18. int a[maxn];
  19. signed main() {
  20.     ios_base::sync_with_stdio(false);
  21.     cin.tie(NULL);
  22.     // freopen("LED.INP", "r", stdin);
  23.     // freopen("LED.OUT", "w", stdout);
  24.     cin >> n >> k;
  25.     int sumChan = 0, sumLe = 0;
  26.     int minLe = INF, cntLe = 0;
  27.     for(int i = 1; i <= n; i++) {
  28.         cin >> a[i];
  29.         if(a[i] % 2 == 0) {
  30.             sumChan += a[i];
  31.         } else {
  32.             sumLe += a[i];
  33.             minLe = min(minLe, a[i]);
  34.             cntLe++;
  35.         }
  36.     }
  37.     int ans = 0;
  38.     if(cntLe % 2 == 0) {
  39.     	ans = sumChan + sumLe;
  40.     } else {
  41.     	ans = sumChan + sumLe - minLe;
  42.     }
  43.     if(ans < k) {
  44.     	ans = 0;
  45.     }
  46.     cout << ans;
  47.     return 0;
  48. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/ZK5PZC
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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