#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; #include <iostream> #include <cstdio> using namespace std; int main() { int n,x,y,; scanf("%d %d %d",&n,&x,&y); if(y%x==0){ cout<<n-(y/x)<<endl; } else if(n-(y/x)=0){ cout<<0; } else{ cout<<n-(y/x-y%x)<<endl; } return 0; }