Submission #1220359

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220359		toast12	Ice Hockey World Championship (CEOI15_bobek)	C++20	10 / 100	167 ms	20704 KiB

bobek

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
    int n;
    ll m;
    cin >> n >> m;
    vector<ll> v(n);
    for (int i = 0; i < n; i++) cin >> v[i];
    vector<ll> l, r;
    for (int mask = 0; mask < (1<<(n/2)); mask++) {
        ll sum = 0;
        for (int i = 0; i < (n/2); i++) {
            if (mask & (1<<i)) sum += v[i];
        }
        if (sum <= m) l.push_back(sum);
    }
    for (int mask = 0; mask < (1<<(n-(n/2))); mask++) {
        ll sum = 0;
        for (int i = 0; i < n-(n/2); i++) {
            if (mask & (1<<i)) sum += v[i+(n/2)];
        }
        if (sum <= m) r.push_back(sum);
    }
    ll ans = 0;
    for (int i = 0; i < l.size(); i++) {
        auto it = upper_bound(r.begin(), r.end(), m-l[i]);
        ans += int(it-r.begin());
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10