Submission #952978

#	Time	Username	Problem	Language	Result	Execution time	Memory
952978		Alexabcde1	Remittance (JOI19_remittance)	C++14	100 / 100	252 ms	36436 KiB

remittance

#include<bits/stdc++.h>
#define f first
#define s second
using namespace std;
long long n;
long long a[1000005],b[1000005];
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	cin>>n;
	for (int i=0;i<n;i++) cin>>a[i]>>b[i];
	long long cnt=50;
	while (cnt--){
		for (int i=0;i<n;i++){
			if (a[i]>b[i]){
				long long give=(a[i]-max(0LL,b[i]-1))/2;
				if (give>0) a[i]-=give*2;
				if (give>0) a[(i+1)%n]+=give;
			}
		}
	}
	for (int 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