Submission #188233

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Source Code Expand

#include <iostream>
#include <algorithm>
using namespace std;

int main() {
	int n[500];
	int i=0;
	int num;
	bool flag=false;
	bool f3,f2,f1;
	int cnt=100;

	cin>>num;
	while(cin>>n[i])i++;	
	
	
	while(num>0){
		f1=f2=f3=false;
		for(int i=0;i<3;i++){
			if(num-3==n[i])f3=true;
			if(num-2==n[i])f2=true;
			if(num-1==n[i])f1=true;
		}
		cnt--;
		if(cnt<=0){flag=true;break;}
		if(!f3)num-=3;
		else if(!f2)num-=2;
		else if(!f1)num--;
		else {flag=true;break;}
//		cout<<num<<endl;
	}
	if(flag)cout<<"NO"; else cout<<"YES";
	cout<<endl;	


}

Submission Info

Judge Result