Submission #839115

#	Time	Username	Problem	Language	Result	Execution time	Memory
839115		LinkedArray	Lutrija (COCI19_lutrija)	C++17	70 / 70	156 ms	304 KiB

lutrija

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

bool isPrime(long long num) {
    long long d;

    if (num % 2 == 0 || num <= 1)
        return 0;
    for (d = 3; d * d <= num; d++) {
        if (num % d == 0) {
            return 0;
        }
    }

    return 1;
}

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;

        if(AM2){
            nr++;
        } else if(AP2){
            nr += 2;
        }

        if(BM2){
            nr++;
        } else if(BP2){
            nr += 2;
        }

        // AM2 = 1    AP2 = 1
        // BM2 = 0    BP2 = 1

        cout << nr << '\n';

        /* if(AP2){
            cout << a << ' ' << a + 2 << ' ';
        } else if(AM2){
            cout << a << ' ';
        }

        cout << "2";

        if(BP2){
            cout << ' ' << b + 2 << ' ' << b;
        } else if(BM2){
            cout << ' ' << b;
        } */

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