Submission #1356091

#	Time	Username	Problem	Language	Result	Execution time	Memory
1356091		nathako9n	Ice Hockey World Championship (CEOI15_bobek)	C++20	100 / 100	448 ms	8592 KiB

bobek

#include <bits/stdc++.h>
#define endl '\n'
#define ll long long
using namespace std;
const int N=45;
int n;
ll m,ar[N+4];
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m;
     vector<ll>a,vec,b;
    for(int i=1;i<=n;i++){
        cin>>ar[i];
        if(i<=n/2){
            a.emplace_back(ar[i]);
        }
        else b.emplace_back(ar[i]);
    }
    int sz=a.size();
    for(int i=0;i<(1<<sz);i++){
        ll sum=0;
        for(int j=0;j<sz;j++){
            if(i&(1<<j)){
                sum+=a[j];
            }
        }
        vec.emplace_back(sum);
    }
    sort(vec.begin(),vec.end());

    sz=b.size();
    ll ans=0;
    for(int i=0;i<(1<<sz);i++){
        ll sum=0;
        for(int j=0;j<sz;j++){
            if(i&(1<<j)){
                sum+=b[j];
            }
        }
        ans+=upper_bound(vec.begin(),vec.end(),m-sum)-vec.begin();
    }
    cout<<ans;
    return 0;
}
/*

5 1000
100 1500 500 500 1000

6 6
1 2 3 4 5 6

*/

• 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