Submission #910066

#	Time	Username	Problem	Language	Result	Execution time	Memory
910066		CyberCow	Lutrija (COCI19_lutrija)	C++17	70 / 70	140 ms	592 KiB

lutrija

#include <random>
#include <algorithm>
#include <bitset>
#include <chrono>
#include <cmath>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <chrono>
#define fr first
#define sc second
#define ad push_back
using namespace std;
using ll = long long;
mt19937 rnd(348502);

const ll N = 100005;

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

void solve()
{
    ll a, b;
    cin >> a >> b;
    if (is_prime(abs(a - b)))
    {
        cout << 2 << '\n' << a << ' ' << b;
    }
    else if (a == 2)
    {
        if (is_prime(b + 2))
            cout << 3 << '\n' << 2 << ' ' << b + 2 << ' ' << b;
        else
            cout << -1;
    }
    else if (b == 2)
    {
        if (is_prime(a + 2))
            cout << 3 << '\n' << a << ' ' << a + 2 << ' ' << 2;
        else
            cout << -1;
    }
    else if (is_prime(a - 2) && is_prime(b - 2))
    {
        cout << 3 << '\n' << a << ' ' << 2 << ' ' << b;
    }
    else if (is_prime(a + 2) && is_prime(b + 2))
    {
        cout << 5 << '\n' << a << ' ' << a + 2 << ' ' << 2 << ' ' << b + 2 << ' ' << b;
    }
    else if (is_prime(a + 2) && is_prime(b - 2))
    {
        cout << 4 << '\n' << a << ' ' << a + 2 << ' ' << 2 << ' ' << b;
    }
    else if(is_prime(a - 2) && is_prime(b + 2))
    {
        cout << 4 << '\n' << a << ' ' << 2 << ' ' << b + 2 << ' ' << b;
    }
    else
        cout << -1;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
    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