#include<bits/stdc++.h>
using namespace std;
int main(){
    int m,n;
    int c;
    cin>>m>>n;
    c=m/n;
    if(c>0)
    cout<<c;
    else if(c==0)
    cout<<0;
    else
    cout<<c-1;
    return 0;
    
    
    
    
}