Submission #715436

#	Time	Username	Problem	Language	Result	Execution time	Memory
715436		MilosMilutinovic	Football (info1cup20_football)	C++14	100 / 100	43 ms	2004 KiB

football

#include <bits/stdc++.h>

using i64 = long long;

void solve() {
    int n, k;
    std::cin >> n >> k;

    std::vector<int> a(n);
    for (int i = 0; i < n; i++) {
        std::cin >> a[i];
    }

    int pw = 1;
    while (pw * 2 <= k) {
        pw *= 2;
    }

    k = pw;

    i64 s = 0;
    for (int i = 0; i < n; i++) {
        s += a[i];
    }

    if (s % 2 == 1) {
        std::cout << "1";
        return;
    }

    std::function<int(int, int)> dfs = [&](int x, int v) {
        if (x > k) {
            return 0;
        }
        int t = v;
        for (int i = 0; i < n; i++) {
            t ^= (a[i] % 2);
        }
        if (t == 1) {
            return 1;
        }
        for (int i = 0; i < n; i++) {
            a[i] /= 2;
        }
        return dfs(x * 2, t);
    };

    std::cout << dfs(1, 0);
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int t;
    std::cin >> t;
    while (t--) {
        solve();
    }

    return 0;
}

• Subtask 1: 26 / 26
• Subtask 2: 8 / 8
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 16 / 16
• Subtask 6: 16 / 16
• Subtask 7: 7 / 7
• Subtask 8: 8 / 8