Submission #1220367

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220367		toast12	Ice Hockey World Championship (CEOI15_bobek)	C++20	100 / 100	298 ms	20920 KiB

bobek

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

using ll = long long;

int main() {
    int n;
    ll m;
    cin >> n >> m;
    ll x = n/2;
    ll y = n-x;
    vector<ll> a(x), b(y);
    for (int i = 0; i < x; i++) cin >> a[i];
    for (int i = 0; i < y; i++) cin >> b[i];
    vector<ll> l, r;
    for (int mask = 0; mask < (1<<x); mask++) {
        ll sum = 0;
        for (int i = 0; i < x; i++) {
            if (mask & (1<<i)) sum += a[i];
        }
        if (sum <= m) l.push_back(sum);
    }
    for (int mask = 0; mask < (1<<y); mask++) {
        ll sum = 0;
        for (int i = 0; i < y; i++) {
            if (mask & (1<<i)) sum += b[i];
        }
        if (sum <= m) r.push_back(sum);
    }
    ll ans = 0;
    int idx = r.size()-1;
    sort(l.begin(), l.end());
    sort(r.begin(), r.end());
    for (int i = 0; i < l.size(); i++) {
        while (r[idx]+l[i] > m) idx--;
        ans += idx+1;
    }
    cout << ans << '\n';
    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