Submission #203928

#	Time	Username	Problem	Language	Result	Execution time	Memory
203928		AQT	Remittance (JOI19_remittance)	C++14	100 / 100	300 ms	16248 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 <= N; 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;
			if(d > arr[i]){
				d-=2;
			}
			arr[(i+1)%N] += d>>1;
			arr[i] -= d;
			cnt = 0;
		}
	}
	for(int i = 0; i<N; i++){
		if(arr[i] != brr[i]){
			cout << "No";
			return 0;
		}
	}
	cout << "Yes";
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:18:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(arr[i] == 1 && brr[i] == 0 || arr[i] <= brr[i]){
      ~~~~~~~~~~~~^~~~~~~~~~~~~~

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