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  1. /*
  2.  * author :Sadik Hassan(_sad_)
  3.  *
  4. */
  5. #pragma GCC optimize("Ofast")
  6. #pragma GCC target("avx,avx2,fma")
  7. #pragma GCC optimization ("unroll-loops")
  8. #include "bits/stdc++.h"
  9. using namespace std;
  10. using   ll =          long long;
  11. using   ld =          long double;
  12. #define nl            "\n"
  13. #define pb            push_back
  14. #define fi            first
  15. #define se            second
  16. #define MP            make_pair
  17. #define PI            (acos(-1.0))
  18. #define rep1(i,n)     for(int i=1;i<=n;i++)
  19. #define rep(i,n)      for(int i=0;i<n;i++)
  20. #define urep(i,n)     for(int i=n-1;i>=0;i--)
  21. #define urep1(i,n)    for(int i=n;i>=1;i--)
  22. #define SZ(s)         (int)s.size()
  23. #define all(x)        (x).begin(), (x).end()
  24. #define rall(x)       (x).rbegin(), (x).rend()
  25. #define w(t)          int t;cin>>t;while(t--)
  26. #define _SAD()     	  ios::sync_with_stdio(0),cin.tie(0),cout.tie(0),cout<<fixed<<setprecision(15);
  27.  
  28. typedef vector<int> vi;
  29. typedef vector<ll> vii;
  30. typedef set<int> si;
  31. typedef set<ll> sii;
  32. /*---------------------------------------------------------------------*/
  33.  
  34. const int N = (int)2e5+5;
  35. const int MOD =(int)1e9+7;
  36. const ll INF = (ll)1e18+5;
  37. const int M2 = 998244353;
  38. int main()
  39. {
  40.     _SAD()
  41.     int n,k;
  42.     cin>>n>>k;
  43.     ll cnt=0;
  44.     vii a;
  45.     rep(i,n)
  46.     {
  47.         ll x;
  48.         cin>>x;
  49.         if(x<k)
  50.         {
  51.             a.pb(x);
  52.         }
  53.     }
  54.     sort(all(a));
  55.     ll i=0,j=SZ(a)-1;
  56.     while(i<=j)
  57.     {
  58.         ll pp=min(k-a[i],k-a[j]);
  59.         cnt+=pp;
  60.         a[i]+=pp;
  61.         if(i!=j)a[j]+=pp;
  62.         if(a[j]>=k)j--;
  63.         if(a[i]>=k)i++;
  64.     }
  65.     cout<<cnt<<nl;
  66.     return 0;
  67. }
  68.  
Time limit exceeded #stdin #stdout 5s 4204KB
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https://ideone.com/DdjEXt
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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