Submission #158532

#	Time	Username	Problem	Language	Result	Execution time	Memory
158532		bicsi	Remittance (JOI19_remittance)	C++14	100 / 100	332 ms	36396 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n; cin >> n;
    vector<long long> a(n), b(n);
    for (int i = 0; i < n; ++i)
        cin >> a[i] >> b[i];

    int ch = 1;
    while (ch--) {
        for (int i = 0; i < n; ++i) {
            if (a[i] > b[i]) {
                long long take = (a[i] - b[i]) / 2;
                a[i] -= 2 * take;
                if (a[i] > b[i] && a[i] > 1) {
                    a[i] -= 2;
                    take += 1;
                }
                int j = (i == n - 1 ? 0 : i + 1);
                a[j] += take;
                if (take > 0) ch = 1;
            }
        }
    }

    for (int i = 0; i < n; ++i) {
        if (a[i] != b[i]) {
            cout << "No\n";
            return 0;
        }
    }
    cout << "Yes\n";
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45