#include<bits/stdc++.h>
using namespace std;
int main()
{
	int x,y,n;
	cin>>n>>x>>y;
    int t=(y+x-1)/x;
	int r=n-t;
	if(r<=0)
	{
		r=0;
	}
	cout<<r;
	return 0;
 }

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	if(a>b) //保证 a<=b 
	{
		int t=a;
		a=b;
		b=t;
	} 
	if(a>c) //保证a<=c 
	{
		int t=a;
		a=c;
		c=t;
	}
	if(b>c) //保证b<=c 
	{
		int t=b;
		b=c;
		c=t;
	}
	if(a+1==b&&b+1==c)
	{
		cout<<"TRUE";
	}
	else
	{
		cout<<"FALSE";
	}
	return 0;
}