Submission #1121499

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121499		OmarAlimammadzade	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	335 ms	20900 KiB

bobek

// author - alimammadzade

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

signed main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    // system("cls"), freopen("in.txt", "r", stdin);
    int n, m, res = 0;
    cin >> n >> m;
    vector<int> fi, se;
    vector<int> fii, see;
    for (int i = 0; i < n / 2; i++) {
        int x;
        cin >> x;
        fi.push_back(x);
    }
    for (int i = n / 2; i < n; i++) {
        int x;
        cin >> x;
        se.push_back(x);
    }
    int n1 = fi.size(), n2 = se.size();
    for (int i = 0; i < (1 << n1); i++) {
        int sum = 0;
        for (int j = 0; j < n1; j++)
            if (i & (1 << j)) sum += fi[j];
        fii.push_back(sum);
    }
    for (int i = 0; i < (1 << n2); i++) {
        int sum = 0;
        for (int j = 0; j < n2; j++)
            if (i & (1 << j)) sum += se[j];
        see.push_back(sum);
    }
    sort(fii.begin(), fii.end());
    sort(see.begin(), see.end());
    for (int& i : fii) {
        if (i > m) break;
        res += upper_bound(see.begin(), see.end(), m - i) - see.begin();
    }
    cout << res;
}

• 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