Submission #234359

#	Time	Username	Problem	Language	Result	Execution time	Memory
234359		super_j6	Lutrija (COCI19_lutrija)	C++14	70 / 70	349 ms	512 KiB

lutrija

#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
 
ll a, b;
 
bool ptest(ll x){
    if(x <= 1) return !x;
    for(ll i = 2; i * i <= x; i++){
        if(x % i == 0) return 0;
    }
    return 1;
}
 
ll val(ll x){
    for(int i = -2; i <= 2; i += 2){
        if(ptest(x + i - 2) && ptest(x + i)) return x + i;
    }
    return 0;
}
 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> a >> b;
	
	if(ptest(abs(a - b))){
	    cout << 2 << endl;
	    cout << a << " " << b << endl;
	}else{
	    ll x = val(a), y = val(b);
	    if(!x || !y){
	        cout << -1 << endl;
	    }else{
    	    cout << 1 + (x != a) + (x != 2) + (y != 2) + (y != b) << endl;
    	    cout << a << " ";
    	    if(x != a) cout << x << " ";
    	    if(x != 2) cout << 2 << " ";
    	    if(y != b && y != 2) cout << y << " ";
    	    cout << b << endl;
	    }
	}
 
	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7