Submission #814690

#TimeUsernameProblemLanguageResultExecution timeMemory
814690tlnk07Lutrija (COCI19_lutrija)C++17
7 / 70
1 ms304 KiB
#include<bits/stdc++.h>
using namespace std;

long long x, y;

bool check(int x)
{
	for(int i = 2; i * i <= x; ++i)	if(x % i == 0)	return 0;
	return 1;
}

int main()
{
	cin >> x >> y;
	if(check(abs(x - y)))	cout << "2\n" << x << " " << y;
	else if(x == 2 || y == 2)
	{
		if(check(max(x, y) + 2))	cout << "3\n" << x << " " << max(x, y) + 2 << " " << y;
		else if(check(max(x, y) - 2))	cout << "3\n" << x << " " << max(x, y) - 2 << " " << y;
		else	cout << -1;
	}
	else
	{
		if(check(x - 2) && check(y - 2))	cout << "3\n" << x << " 2 " << y;
		else	cout << -1;
	}
}
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