제출 #336598

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
336598		aryan12	송금 (JOI19_remittance)	C++17	100 / 100	270 ms	17516 KiB

remittance

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

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    long long n;
    cin >> n;
    vector<long long> a(n), b(n);
    long long suma = 0, sumb = 0;
    for(long long i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
        suma += a[i];
        sumb += b[i];
    }
    if(suma < sumb) {
        cout << "No" << endl;
        return 0;
    }
    if(suma == sumb) {
        for(long long i = 0; i < n; i++) {
            if(a[i] != b[i]) {
                cout << "No" << endl;
                return 0;
            }
        }
        cout << "Yes" << endl;
        return 0;
    }
    bool f = true;
    while(f) {
        f = false;
        for(long long i = 0; i < n; i++) {
            long long extra = (a[i] - b[i]) / 2;
            if(extra == 0 || b[i] > a[i])
                continue;
            a[i] -= extra * 2;
            a[(i + 1) % n] += extra;
            f = true;
        }
        /*for(long long i = 0; i < n; i++) {
            cout << a[i] << " ";
        }
        cout << endl;*/
    }
    /*for(long long i = 0; i < n; i++) {
        cout << a[i] << " " << b[i] << endl;
    }*/
    bool f1 = true, f2 = false;
    for(long long i = 0; i < n; i++) {
        if(a[i] != b[i] + 1) {
            f1 = false;
        }
        if(a[i] >= 2)
            f2 = true;
    }
    if(f1 && f2) {
        cout << "Yes" << endl;
        return 0;
    }
    for(long long i = 0; i < n; i++) {
        if(a[i] != b[i]) {
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
}

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