Submission #606859

#	Time	Username	Problem	Language	Result	Execution time	Memory
606859		Hanksburger	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	424 ms	8660 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
long long a[45], n, m, ans;
vector<long long> v;
void f(int l, int r, long long s)
{
    if (l>r)
    {
        if (r==n/2)
            v.push_back(s);
        else
            ans+=upper_bound(v.begin(), v.end(), m-s)-v.begin();
        return;
    }
    f(l+1, r, s);
    f(l+1, r, s+a[l]);
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for (int i=1; i<=n; i++)
        cin >> a[i];
    f(1, n/2, 0);
    sort(v.begin(), v.end());
    f(n/2+1, n, 0);
    cout << ans;
    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