제출 #711087

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
711087		dozer	Lutrija (COCI19_lutrija)	C++14	0 / 70	308 ms	340 KiB

lutrija

#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n";
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define N 200005
#define int long long

const int modulo = 1e9 + 7;
int dp[1005][1005];

bool is_prime(int num)
{
	num = abs(num);
	if (num < 2) return 0;
	for (int i = 2; i * i <= num; i++)
		if (num % i == 0) return 0;
	return 1;
}

vector<int> ans;
void solve(int a, int b)
{
	if (a == b) 
	{
		ans.pb(a);
		return;
	}
	if (is_prime(b - a))
	{ 
		ans.pb(a);
		solve(b, b);
	}
	else if (is_prime(a - 2)) 
	{
		ans.pb(a);
		solve(2, b);
	}
	else if (is_prime(b - 2))
	{
		solve(a, 2);
		ans.pb(b);
	}
	else if (is_prime(a + 2)) 
	{
		ans.pb(a);
		solve(a + 2, b); 
	}
	else if (is_prime(b + 2))
	{
		solve(a, b + 2);
		ans.pb(b);
	}
}	


int32_t main()
{
	fastio();

	int a, b;
	cin>>a>>b;
	solve(a, b);
	if (ans.back() == b)
	{
		cout<<ans.size()<<endl;
		for (auto i : ans) cout<<i<<sp;
		cout<<endl;
	}
	else cout<<-1<<endl;
	cerr << "time taken : " << (float)clock() / CLOCKS_PER_SEC << " seconds\n";
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 7
• Subtask 5: 0 / 7
• Subtask 6: 0 / 7
• Subtask 7: 0 / 7
• Subtask 8: 0 / 7
• Subtask 9: 0 / 7
• Subtask 10: 0 / 7