Submission #1121989

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121989		Haciyev12	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	404 ms	8760 KiB

bobek

#include  "bits/stdc++.h"
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define fori for(int i=0;i<n;i++)
#define forj for(int j=0;j<n;j++)
#define pb push_back
#define in insert
#define F first
#define S second
#define endl  '\n'
using namespace std;
int main(){
    fast;
    ll n,x;
    cin>>n>>x;
    vector<ll>v;
    ll a[n];
    for(int i=0;i<n;i++){
      cin>>a[i];
    }
    ll sum,mid=n/2,mid2=n-mid;
      ll ans=0;
    for(int i=0;i<(1<<mid);i++){
      sum=0;
      for(int j=0;j<mid;j++){
        if((i & (1<<j))!=0){
          sum+=a[j];
        }
      }
      v.pb(sum); //5
      }
      sort(v.begin(),v.end());
      for(int i=0;i<(1<<mid2);i++){
        sum=0;
        for(int j=0;j<mid2;j++){
          if((i & (1<<j))!=0){
            sum+=a[j+mid];//10
          }
        }
        
        
       auto q=upper_bound(v.begin(),v.end(),x-sum);
        ans+=q - v.begin();
      }
      cout<<ans<<endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10