#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,x,y,z; cin>>n>>x>>y; z=n-y/x; if(y%x>0){ z=z-1; } cout<<z; return 0; }