Submission #502859

#	Time	Username	Problem	Language	Result	Execution time	Memory
502859		amunduzbaev	Remittance (JOI19_remittance)	C++14	15 / 100	1 ms	316 KiB

remittance

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

#define ar array
#define int long long

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);

	int n; cin>>n;
	vector<int> a(n), b(n);
	for(int i=0;i<n;i++){
		cin>>a[i]>>b[i];
	}
	
	for(int j=0;j<2;j++){
		for(int i=0;i<n;i++){
			if(a[i] <= b[i]) continue;
			int x = (a[i] - b[i] + 1) / 2;
			if(a[i] < x * 2) continue;
			a[(i + 1) % n] += x;
			a[i] -= 2 * x;
		}
	}
	
	for(int i=0;i<n;i++){
		if(a[i] != b[i]){
			cout<<"No\n";
			return 0;
		}
	}
	
	cout<<"Yes\n";
}

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