제출 #217577

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
217577		bayemirov	Lutrija (COCI19_lutrija)	C++17	0 / 70	5 ms	384 KiB

lutrija

//bayemirov                                       
#include <bits/stdc++.h>               

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

typedef long long ll;

#define pb push_back

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

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	ll a, b;
	cin >> a >> b;
	if (isPrime(abs(a-b))) cout << 2 << "\n" << a << ' ' << b, exit(0);
	if (isPrime(abs(a+b))) cout << 3 << "\n" << a << ' ' << a + b << ' ' << b, exit(0);
	cout << -1;
	return 0;
}                    

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