제출 #989790

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
989790		RandomUser	Lutrija (COCI19_lutrija)	C++17	0 / 70	21 ms	600 KiB

lutrija

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

int32_t main() {
    ll A, B;
    cin >> A >> B;

    if(A > 2 && B > 2) {
        ll D = abs(A - B);
        bool ok = 1;
        for(ll i=2; i*i<=D; i++)
            if(D % i == 0) ok = 0;

        if(ok) cout << 2 << "\n " << A << " " << B << '\n';
        else cout << -1 << '\n';
        
        return 0;
    }

    if(A == 2 || B == 2) {
        ll D = abs(A + B);
        bool ok = 1;
        for(ll i=2; i*i<=D; i++)
            if(D % i == 0) ok = 0;

        if(ok) cout << 3 << "\n " << A << " " << A + B << " " << B << '\n';
        else cout << -1 << '\n';
        
        return 0;
    }

    return 0;
}

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