Submission #655747

#	Time	Username	Problem	Language	Result	Execution time	Memory
655747		piOOE	Remittance (JOI19_remittance)	C++17	100 / 100	232 ms	8276 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

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

    int n;
    cin >> n;

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

    if (*max_element(b.begin(), b.end()) == 0 && *max_element(a.begin(), a.end()) > 0) {
        cout << "No\n";
        return 0;
    }

    for (int _ = 0; _ < 30; ++_) {
        for (int i = 0; i < n; ++i) {
            if (a[i] > b[i]) {
                int x = (a[i] - b[i] + 1) / 2;
                a[(i + 1) % n] += x;
                a[i] -= 2 * x;
            }
        }
    }

    if (a == b) {
        cout << "Yes";
    } else {
        cout << "No";
    }
    return 0;
}

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