#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 n,k; cin>>n>>k; if(n/k+n%k>=k){ (n/k+n%k)/k; } cout<<n+n/k; return 0; }