#include<stdio.h>
int countdivisible(int value,int divisor){
    return(value-1)/divisor;

}
int main(){
    int value,divisior;
    scanf("%d %d",&value,&divisor);
    if(value>1000||divisior<100){
        printf("%d\n",countdivisible(value,divisor));
    }
    return 0;
}