#include<bits/stdc++.h> using namespace std; int main(){ int A,B,X,a,b,c; cin>>X>>A>>B; for(int i=1;i<=X;i++){ if(X/A!=0||X/B!=0){ a=X/A; b=X/b; c=a+b; }else cout<<0; } cout<<c; return 0; }