Submission #755213

#	Time	Username	Problem	Language	Result	Execution time	Memory
755213		amirhoseinfar1385	Remittance (JOI19_remittance)	C++17	100 / 100	299 ms	36324 KiB

remittance

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

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin>>n;
	vector<pair<long long,int>>all(n);
	for(int i=0;i<n;i++){
		cin>>all[i].first>>all[i].second;
	}
	int cnt=0;
	int j=0;
	while(cnt<n*3){
		if(all[j].first<=all[j].second){
			j++;
			cnt++;
			j%=n;
			continue;
		}
		if(all[j].first==1&&all[j].second==0){
			j++;
			cnt++;
			j%=n;
			continue;
		}
		cnt=0;
		int fj=j;
		while(all[fj].first>all[fj].second){
			if(all[fj].second==0&&all[fj].first==1){
				break;
			}
			if(all[fj].second==0){
				long long fc=(all[fj].first-all[fj].second)/2;
				all[fj].first-=fc*2;
				all[(fj+1)%n].first+=fc;
				fj++;
				fj%=n;
				continue;
			}
			long long fc=(all[fj].first-all[fj].second+1)/2;
			all[fj].first-=fc*2;
			all[(fj+1)%n].first+=fc;
			fj++;
			fj%=n;
		}
		j++;
		j%=n;
	}
	int f=1;
	for(int i=0;i<n;i++){
		if(all[i].first!=all[i].second){
			f=0;
		}
	}
	if(f){
		cout<<"Yes\n";
	}
	else{
		cout<<"No\n";
	}
}

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