Submission #716602

#	Time	Username	Problem	Language	Result	Execution time	Memory
716602		Warinchai	Lutrija (COCI19_lutrija)	C++14	0 / 70	1 ms	340 KiB

lutrija

#include<bits/stdc++.h>
using namespace std;
int check(long long a){
	long long x=sqrt(a);
	for(int i=2;i<=x;i++){
		if(a%i==0){
			return 0;
		}
	}
	return 1;
}
int main(){
	long long a,b;
	cin>>a>>b;
	if(a==2){
		if(check(b-2)){
			cout<<'3'<<"\n"<<a<<" "<<b-2<<" "<<b;
		}else if(check(b+2)){
			cout<<'3'<<"\n"<<a<<" "<<b+2<<" "<<b;
		}
	}else if(b==2){
		if(check(a-2)){
			cout<<'3'<<"\n"<<a<<" "<<a-2<<" "<<b;
		}else if(check(a+2)){
			cout<<'3'<<"\n"<<a<<" "<<a+2<<" "<<b;
		}
	}else if(abs(a-b)==2){
		cout<<'2'<<"\n"<<a<<" "<<b;
	}else{
		cout<<"-1";
	}
}

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