이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const char r=' ';
const char en='\n';
int prosti(ll a){
if(a<=1) return 0;
for (ll i=2;i*i<=a;i++){
if (a%i==0) return 0;
}
return 1;
}
int main(){
ll a,b;
cin >> a >> b;
if (a==2){
if (prosti(b+2)){
cout << 3 << en << a << r << b+2 << r<< b;
return 0;
}
if (prosti(b-2)){
cout << 2 << en << a << r << b;
return 0;
}
cout << -1;
return 0;
}
if (b==2){
if (prosti(a+2)){
cout << 3 << en << a << r << a+2 << r<< b;
return 0;
}
if (prosti(a-2)){
cout << 2 << en << a << r << b;
return 0;
}
cout << -1;
return 0;
}
if (prosti(a+2)){
if (prosti(b+2)){
cout << 5 << en << a << r << a+2 << r << 2 << r<< b+2 << r<< b;
return 0;
}
if (prosti(b-2)){
cout << 4 << en << a << r << a+2 << r << 2 << r<< b;
return 0;
}
cout << -1;
return 0;
}
if (prosti(a-2)){
if (prosti(b+2)){
cout << 4 << en << a << r << 2 << r<< b+2 << r<< b;
return 0;
}
if (prosti(b-2)){
cout << 3 << en << a << r << 2 << r<< b;
return 0;
}
cout << -1;
return 0;
}
cout << -1;
return 0;
}
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