Program to find the new numbers

#include<iostream>
using namespace std;
int main()
{
	int a,mid,sp=0,ep=5;
	cout << "enter the value of a:";
	cin >> a;
	mid = (sp + ep) / 2;
	if (a >= 0 && a <= 2)
	{
		if (a >= 0 && a<=1)
		{
			if (a == 0)
			{
				cout << "No is 0";
			}
			else
			{
				cout << "No is 1";
			}
		}
		else
		{
			cout << "NO is 2";
		}

			
		
	}
	else if (a >= 3 && a <= 5)
	{
		if (a >= 3 && a <= 4)
		{
			if (a == 3)
			{
				cout << "No is 3";
			}
			else
			{
				cout << "no is 4";
			}
		
		
		}
		else
		{
			cout << "No is 5";

		}
		
	}
	getchar();
	getchar();
	return 0;
}