#include <stdio.h>
#include <stdlib.h>

int inscal(int x,int y,int l);
int main()
{
    int x,y,l;
    int instruction=0;
    int absx,absy;
    
    absx=abs(x);
    absy=abs(y);
    
    instruction=inscal(absx,absy,l);
    if(y>=0){
        instruction++;
    }
    else{
        instruction+=2;
    }
    printf("%d",instruction);
    return 0;
}

int inscal(int x,int y,int l)
{
    int instruction=0;
    
    
        if(x<l){
            instruction++;
        }
        else{
            if(x%l==0){
                instruction+=x/l;
            }
            else{
                instruction+=x/l+1;
            }
        }
        if(y<l){
            instruction++;
        }
        else{
            if(y%l==0){
                instruction+=x/l;
            }
            else{
                instruction+=x/l+1;
            }
        }
    return instruction;
}