Submission #837442

#	Time	Username	Problem	Language	Result	Execution time	Memory
837442		LinkedArray	Lutrija (COCI19_lutrija)	C++17	0 / 70	143 ms	284 KiB

lutrija

#include <bits/stdc++.h>
using namespace std;

bool isPrime(long long num){
    long long d = 2;
    while(d *d <= num && num % d != 0){
        d++;
    }

    return (d > num);
}

int main() {
    long long a, b, AP2, AM2, BP2, BM2, nr;

    cin >> a >> b;
    
    AP2 = isPrime(a + 2);
    AM2 = isPrime(a - 2);

    BP2 = isPrime(b + 2);
    BM2 = isPrime(b - 2);

    if(a != 2 && !AP2 && !AM2) {
        cout << "-1";
    } else if(b != 2 && !BP2 && !BM2) {
        cout << "-1";
    } else {
        nr = 1 + AM2 + BM2 + 2 * (AP2 + BP2);

        cout << nr << '\n';

        cout << (AM2 ? to_string(a) + ' ' : (AP2 ? to_string(a) + ' ' + to_string(a + 2) + ' ' : ""))
             << "2 "
             << (BM2 ? to_string(b) + ' ' : (BP2 ? to_string(b + 2) + ' ' + to_string(b) + ' ' : ""));
    }
    return 0;
}

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