#include <iostream>
using namespace std;
int LietKe(int n);
int LietKe(int n)
{
	int a, b;
	for (a = 1; a <= n; a++)
	{
		b = a;
		if (a * a + b * b <= n)
		{
			cout << "a=" << a; 
			cout << "b=" << b << endl;
		}
		b = a+1;
		if (a * a + b * b <= n)
		{
			cout << "a=" << a;
			cout << "b=" << b << endl;
		}
	}
	return 1;
}
int main()
{
	int  n;
	cout << "Vui long nhap n:";
	cin >> n;
	LietKe(n);
	return 1;
}