#include <iostream> using namespace std; int main() { int n,x,y; cin >> n >> x >> y; if(y%x == 0) { n = n-(y/x); }else if(y%x != 0) { n = n-(y/x) -1; }else if(x == 0 || y == 0) { cout << n << endl; } cout << n << endl; }