C++ :

#include<iostream>
using namespace std;
int main()
{
	int max,min,a,b=0,c=0,d=0,e=0;
	cin>>a>>b>>c;
	if (a>b)
	{
	max=a;
	min=b;	
	}
	else
	{
	max=b;
	min=a;	
	}
    for (int i=0;i<c;i++)
    {
    	cin>>d;
    	if (a+b>d&min+d>max)
    	{
    	e++;
    	}
    }
    cout<<e<<endl;
}