#include<bits/stdc++.h>
 using namespace std;
#define INF 1000000000
#define REP(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
typedef long long LL;
LL N,K;
int main(){
    cin>>N>>K;
    cout<<N/(K+1)+1<<endl;
    return 0;
}