Submission #867388

#	Time	Username	Problem	Language	Result	Execution time	Memory
867388		Faisal_Saqib	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	408 ms	22456 KiB

bobek

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
#define int long long
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,m;
    cin>>n>>m;
    int a[n];
    for(int i=0;i<n;i++)
        cin>>a[i];
    int ans=0;
    int fn=(n/2);
    vector<int> fh,sh;
    for(int mask=0;mask<(1ll<<fn);mask++)
    {
        int sum=0;
        for(int j=0;j<fn;j++)
            if(mask&(1ll<<j))
                sum+=a[j];
        if(sum<=m)
            fh.push_back(sum);
    }
    sort(begin(fh),end(fh));
    int sn=n-fn;
    for(int mask=0;mask<(1ll<<sn);mask++)
    {
        int sum=0;
        for(int j=0;j<sn;j++)
            if(mask&(1ll<<j))
                sum+=a[j+fn];
        if(sum<=m)
            sh.push_back(sum);
    }
    for(auto i:sh)
        ans+=upper_bound(begin(fh),end(fh),(m-i))-begin(fh);
    cout<<ans<<endl;
    return 0;
}

• 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