이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
#define int long long
using namespace std;
vector<int> Q;
int t[2000000];
int32_t main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++)
    cin>>t[i];
    for(int i=0;i<(1<<(n/2));i++)
    {
        int pom=i;
        int gdzie=0;
        int suma=0;
        while(pom>0)
        {
            if(pom%2==1)
            suma+=t[gdzie];
            pom/=2;
            gdzie++;
        }
        Q.push_back(suma);
    }
    sort(Q.begin(),Q.end());
    int wynik=0;
    for(int i=0;i<(1<<((n+1)/2));i++)
    {
        int pom=i;
        int gdzie=0;
        int suma=0;
        while(pom>0)
        {
            if(pom%2==1)
                suma+=t[gdzie+n/2];
            pom/=2;
            gdzie++;
        }
        gdzie=upper_bound(Q.begin(),Q.end(),m-suma)-Q.begin();
        gdzie--;
        if(gdzie>=0)
            wynik+=gdzie+1;
    }
    cout<<wynik;
    return 0;
}
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