Submission #1264145

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264145		goulthen	Lutrija (COCI19_lutrija)	C++20	14 / 70	1 ms	328 KiB

lutrija

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

#define int long long
#define rep(i,a,b) for (int i = a; i <= b; ++i)

const int MAXN = 1e5 + 10;

bool prime(int x) {
	if (x%2 == 0 && x!=2) return 0;
	for (int i = 3; i*i <= x; i++) if (x%i==0) return 0;
	return 1;
}

int32_t main() {
	ios_base::sync_with_stdio(0);cin.tie(nullptr);
	int a,b;cin >> a >> b;

	if ((a==3 && b == 7)|| (a == 7 && b == 3)) {
		cout << "3\n" << a << " 5 " << b << '\n';
		return 0;
	}

	if (abs(b-a) == 2) {
		cout << "2\n" << a << " " << b << "\n";
	} else if (a != 2 && b != 2) {
		if (prime(a-2) && prime(b-2)) cout << "3\n" << a << " 2 " << b << '\n';
		else cout << "-1\n";
	} else if (a == 2) {
		if (prime(b+2)) cout <<  "3\n2 " << b+2 << " " << b << '\n';
		else if (prime(b-2)) cout <<  "3\n2 " << b-2 << " " << b << '\n';
		else cout << "-1\n";
	} else {
		if (prime(a+2)) cout <<  "3\n2 " << a+2 << " " << a << '\n';
		else if (prime(a-2)) cout <<  "3\n2 " << a-2 << " " << a << '\n';
		else cout << "-1\n";
	}


	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 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