Submission #542865

#	Time	Username	Problem	Language	Result	Execution time	Memory
542865		colossal_pepe	Remittance (JOI19_remittance)	C++17	100 / 100	703 ms	36428 KiB

remittance

#include <iostream>
using namespace std;

typedef long long ll;

const int MAXN = 1e6;

int n;
ll a[MAXN + 5], b[MAXN + 5];

bool isEqual() {
    for (int i = 0; i < n; i++) {
        if (a[i] != b[i]) return 0;
    }
    return 1;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
    }
    for (int i = 0; i < 100; i++) {
        for (int j = 0; j < n; j++) {
            int k = (j + 1) % n;
            if (a[j] > b[j]) {
                ll x = min(a[j] / 2, ((a[j] - b[j]) / 2) + ((a[j] - b[j]) % 2));
                a[j] -= (2 * x);
                a[k] += x;
            }
        }
    }
    cout << (isEqual() ? "Yes" : "No") << '\n';
    return 0;
}

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