Submission #203922

#	Time	Username	Problem	Language	Result	Execution time	Memory
203922		AQT	Remittance (JOI19_remittance)	C++14	0 / 100	5 ms	424 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

int N;
long long arr[1000005], brr[1000005];

int main(){
	cin.sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> N;
	for(int i = 0; i<N; i++){
		cin >> arr[i] >> brr[i];
	}
	int cnt = 0;
	for(int i = 0; cnt <= 2*N+5; cnt++, i++, i%=N){
		if((arr[i] == 1 && brr[i] == 0) || arr[i] <= brr[i]){
			cnt++;	
		}
		else{
			long long d = arr[i]-brr[i];
			d += d&1;
			arr[(i+1)%N] += d/2;
			arr[i] -= d;
			cnt = 0;
		}
	}
	bool b = 1;
	for(int i = 0; i<N; i++){
		if(arr[i] != brr[i]){
			b = 0;
		}
	}
	cout << (b ? "Yes" : "No") << endl;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45