Submission #1338303

#	Time	Username	Problem	Language	Result	Execution time	Memory
1338303		neptunns	Lutrija (COCI19_lutrija)	C++20	70 / 70	57 ms	432 KiB

lutrija

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int long long
#define maxn 100005
#define mi LLONG_MIN
#define ma LLONG_MAX
#define mod 1000000007
#define pb push_back
#define S second
#define F first
int a, b;
bool ans = 0;
bool isp(int x) {
    if (x < 2) return false;
    for (int i = 2; i * i <= x; i++) {
        if (x % i == 0) return false;
    }
    return true;
}

vector<int> bfs() {
    vector<int> v;
    v.pb(a);
    if (a != 2) {
        if (isp(a - 2)) {
            v.pb(2);
        } else if (isp(a + 2)) {
            v.pb(a + 2);
            v.pb(2);
        } else {
            return v;
        }
    }
    if (isp(b - 2)) {
        v.pb(b);
    } else if (isp(b + 2)) {
        v.pb(b + 2);
        v.pb(b);
    } else {
        return v;
    }
    ans = 1;
    return v;
}

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    cin >> a >> b;
    vector<int> answ = bfs();
    if (ans) {
        cout << answ.size() << endl;
        for (auto it : answ) {
            cout << it << " ";
        }
    } else {
        cout << -1;
    }
}

• 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