#include #include #include #include #include #include #include #include #include #include #include #include #include #include typedef long long ll; using namespace std; #define debug(x) cerr << #x << " = " << (x) << endl; #define mod 1000000007 //1e9+7(prime number) #define INF 1000000000 //1e9 #define LLINF 2000000000000000000LL //2e18 #define SIZE 100010 int main(){ ll n,k; scanf("%lld%lld",&n,&k); ll a = (n+k)/(k+1); if(n < k+1){ puts("1"); }else{ printf("%lld\n",a); } return 0; }