#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 a,b,sum; cin>>a>>b; sum=a/b+1; if(a%b>1){ sum+=2; }else{ sum=a/b+1; } cout<<sum<<endl; return 0; }