# include<iostream> using namespace std; int main(){ int n,x,y; scanf("%d%d%d",&n,&x,&y); if(y%x != 0){ n-(y/x+1)<0?cout<<0<<endl:cout<<n-(y/x+1)<<endl; } if(y%x == 0){ n-(y/x)<0?cout<<0<<endl:cout<<n-y/x<<endl; } return 0; }