#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; int main(){ int n1,k; cin>>n1>>k; if(n1%k>1) { cout<<n1/k+2<<endl; } else { cout<<n1/k+1<<endl; } return 0; }