Problem:
Score : 500 points

Problem Statement

There are N points on the 2D plane, i-th of which is located on (x_i, y_i).
There can be multiple points that share the same coordinate.
What is the maximum possible Manhattan distance between two distinct points?

Here, the Manhattan distance between two points (x_i, y_i) and (x_j, y_j) is defined by |x_i-x_j| + |y_i-y_j|.

Constraints

2 \leq N \leq 2 \times 10^5

1 \leq x_i,y_i \leq 10^9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
x_1 y_1
x_2 y_2
:
x_N y_N

Output

Print the answer.

Sample Input 1

3
1 1
2 4
3 2

Sample Output 1

4

The Manhattan distance between the first point and the second point is |1-2|+|1-4|=4, which is maximum possible.

Sample Input 2

2
1 1
1 1

Sample Output 2

0

Solution in C (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>

int abs(int a){
  if(a>=0){
  }else{
    a=-1*a;
  }
  return a;
}

int main(void){
  int N;
  scanf("%d",&N);
   
  int x[N],y[N];
  for(int w=0;w<N;w++){
     scanf("%d %d",&x[w],&y[w]);
  }
  
  int i=0,j=1;
  int p=0,q;
  for(;i<N;i++){
    for(;j<N;j++){
      q=abs(x[i]-x[j])+abs(y[i]-y[j]);
      if(p<q)p=q;
    }
  }
  printf("%d",p);
}