백준 24262 c++

#include <iostream>

using namespace std;

int input(int lower, int upper);

int main(void)
{
	int N;

	N = input(1, 500000);
	cout << 1 << "\n" << 0;

	return 0;
}

int input(int lower, int upper)
{
	int A;

	while (1)
	{
		cin >> A;
		if (A >= lower && A <= upper)
		{
			break;
		}
		else
		{
			;
		}
	}

	return A;
}