Submission #814852

#	Time	Username	Problem	Language	Result	Execution time	Memory
814852		Tunglam07	Lutrija (COCI19_lutrija)	C++17	42 / 70	140 ms	340 KiB

lutrija

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

bool isprime(long long x)
{
    if(x==1)
	{
        return false;
    }
    for(int i=2;i<=sqrt(x);i++)
	{
        if(x%i==0)
		{
            return false;
        }
    }
    return true;
}
 
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long a,b;
    cin >> a >> b;
    if(a==2)
	{
        ans = {2};
    }
    else
	{
        if(isprime(a-2))
		{
            ans = {a,2};
        }
        else if(isprime(a+2))
		{
            ans = {a,a+2,2};
        }
        else
		{
            cout << -1 << endl;
            return 0;
        }
    }
    if(b!=2)
	{
        if(isprime(b-2))
		{
            ans.push_back(b);
        }
        else if(isprime(b+2))
		{
            ans.push_back(b+2);
            ans.push_back(b);
        }
        else
		{
            cout << -1 << endl;
            return 0;
        }
    }
    cout << ans.size() << endl;
    for(int i : ans)
	{
        cout << i << " ";
    }
}

• 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: 0 / 7
• Subtask 8: 0 / 7
• Subtask 9: 0 / 7
• Subtask 10: 0 / 7