Submission #666637

#	Time	Username	Problem	Language	Result	Execution time	Memory
666637		Koful123	Lutrija (COCI19_lutrija)	C++17	70 / 70	157 ms	300 KiB

lutrija

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define pb push_back
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
 
 bool prime(int x){
 	if(x <= 1) return false;
 	for(int i = 2; i * i <= x; i++){
		if(x % i == 0) return false;
	}
	return true;
}
 
void solve(){
 
	int a,b;
	cin >> a >> b;
 
	if(abs(a-b) == 2){
		cout << "2\n" << a << ' ' << b << endl;
		return;
	}

	if(a == 3 && b == 7){
		cout << "3\n3 5 7";
		return;
	}
	else if(a == 7 && b == 3){
		cout << "3\n7 5 3";
		return;
	}

	if(a == 2){
		if(prime(b + 2)) cout << "3\n" << a << ' ' << b + 2 << ' ' << b << endl;
		else if(prime(b - 2)) cout << "3\n" << a << ' ' << b - 2 << ' ' << b << endl;
		else cout << -1 << endl;
		return;
	}
	if(b == 2){
		if(prime(a + 2)) cout << "3\n" << a << ' ' << a + 2 << ' ' << b << endl;
		else if(prime(a - 2)) cout << "3\n" << a << ' ' << a - 2 << ' ' << b << endl;
		else cout << -1 << endl;
		return;
	}

	if(prime(a + 2) && prime(b + 2)){
		cout << "5\n" << a << ' ' << a + 2 << " 2 " << b + 2 << ' ' << b << endl;
	}
	else if(prime(a - 2) && prime(b - 2)){
		cout << "3\n" << a << " 2 " << b << endl;
	}
	else if(prime(a - 2) && prime(b + 2)){
		cout << "4\n" << a << " 2 " << b + 2 << ' ' << b << endl;
	}
	else if(prime(a + 2) && prime(b - 2)){
		cout << "4\n" << a << ' ' << a + 2 << " 2 " << b << endl; 
	}

	else cout << -1 << endl;
}
 
signed main(){	
 		
	ios::sync_with_stdio(0);
	cin.tie(0);
 
	int t = 1;
//	cin >> t;
 
	while(t--)
		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