Submission #735865

#	Time	Username	Problem	Language	Result	Execution time	Memory
735865		aykhn	Lutrija (COCI19_lutrija)	C++14	0 / 70	1 ms	340 KiB

lutrija

#include <bits/stdc++.h>


/*
    author: aykhn
    5/4/2023
*/

using namespace std;

typedef long long ll;

const int oo = INT_MAX;
const ll ooo = LONG_MAX;
const ll mod = 1e9 + 7;

#define OPT ios_base::sync_with_stdio(0); \
            cin.tie(0); \
            cout.tie(0)
#define pii pair<int,int>
#define pll pair<ll,ll>
#define all(v) v.begin(), v.end()
#define mpr make_pair
#define pb push_back
#define ts to_string
#define fi first
#define se second
#define inf 0x3F3F3F3F
#define tos to_string
#define infll 0x3F3F3F3F3F3F3F3FLL
#define bpc __builtin_popcount

bool isPrime(ll a)
{
    if (a <= 1) return false;

    for (ll i = 2; i * i <= a; i++)
    {
        if (a % i == 0) return false;
    }

    return true;
}

int main()
{
    ll a, b;
    cin >> a >> b;

    if (min(a, b) == 3 && max(a, b) == 7)
    {
        cout << 3 << endl;
        cout << a << " 5 " << b << endl;
        return 0;
    }

    if (isPrime(abs(a - b)))
    {
        cout << 2 << endl;
        cout << a << " " << b << endl;
        return 0;
    }

    if (min(a, b) != 2)
    {
        cout << -1 << endl;
        return 0;
    }

    if (isPrime(max(a, b) - 2) && isPrime(max(a, b) - 4))
    {
        cout << 3 << endl;
        cout << a << " " << max(a, b) - 2 << " " << b << endl;
        return 0;
    }

    if (isPrime(max(a, b) + 2))
    {
        cout << 3 << endl;
        cout << a << " " << max(a, b) + 2 << " " << b << endl;
        return 0;
    }

    cout << -1 << endl;
    return 0;

}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 7
• Subtask 5: 0 / 7
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• Subtask 7: 0 / 7
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• Subtask 10: 0 / 7