UVA - 11494 .cpp file

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int x1,x2,y1,y2;
    while(cin>>x1>>y1>>x2>>y2)
    {
        if(x1==0 && y1==0 && x2==0 && y2==0) break;
        if(x1==x2 && y1==y2) cout<<"0"<<endl;
        else if(x1==x2 || y1==y2 || abs(x1-x2)==abs(y1-y2)) cout<<"1"<<endl;
        else cout<<"2"<<endl;
    }
    return 0;
}