#include<bits/stdc++.h>
using namespace std;
int main(){
    int k,n,m;
    cin>>k>>n>>m;
    n--,m--;
    int n1,n2,m1,m2;
    n1=n/k,n2=n%k;
    m1=m/k,m2=m%k;
    if(n1%2)n2=k-1-n2;
    if(m1%2)m2=k-1-m2;
    cout<<abs(n1-m1)+abs(n2-m2)<<endl;
    return 0;
}