Submission #208628

#	Time	Username	Problem	Language	Result	Execution time	Memory
208628		super_j6	송금 (JOI19_remittance)	C++14	100 / 100	306 ms	17516 KiB

remittance

#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
#define endl '\n'
#define pi pair<int, int>

const int maxn = 1000000;
int n;
int a[maxn], b[maxn];

int main(){
	ios::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, j = 0; j <= n; i++, i %= n, j++){
		if(!(a[i] == 1 && !b[i]) && a[i] > b[i]){
			int d = a[i] - b[i];
			d += d & 1;
			d -= 2 * (d > a[i]);
			a[(i + 1) % n] += d >> 1;
			a[i] -= d;
			j = 0;
 		}
	}
	
	for(int i = 0; i < n; i++){
		if(a[i] != b[i]){
			cout << "No" << endl;
			return 0;
		}
	}
	
	cout << "Yes" << endl;

	return 0;
}

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