# pattern printing

You are required to form a matrix of size

$r×c$

where

$r$

is the number of rows and

$c$

is the number of columns. You are required to form the waves of numbers around the provided center,

(0-based indexing).
Example:

• Size of the matrix:
$r=9$

and

$c=9$

• Center coordinates:
${C}_{i}=4$

and

${C}_{j}=4$

(0 based indexing)

• Pattern:
4 4 4 4 4 4 4 4 4
4 3 3 3 3 3 3 3 4
4 3 2 2 2 2 2 3 4
4 3 2 1 1 1 2 3 4
4 3 2 1 0 1 2 3 4
4 3 2 1 1 1 2 3 4
4 3 2 2 2 2 2 3 4
4 3 3 3 3 3 3 3 4
4 4 4 4 4 4 4 4 4

You are given the values of

(the values of

${C}_{i}$

and

${C}_{j}$

Input format
The first line contains four integers

$r$

$c$

${C}_{i}$

, and

${C}_{j}$

denoting the number of rows, number of columns,

$x$

coordinate of center, and

$y$

coordinate of center.
Output format
Print the pattern for the provided input.
Constraints

$1\le r\le 1e3\phantom{\rule{0ex}{0ex}}1\le c\le 1e3\phantom{\rule{0ex}{0ex}}0\le {C}_{i}

SAMPLE INPUT
`10 10 5 5`
SAMPLE OUTPUT
`5 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 5 4 3 3 3 3 3 3 3 4 5 4 3 2 2 2 2 2 3 4 5 4 3 2 1 1 1 2 3 4 5 4 3 2 1 0 1 2 3 4 5 4 3 2 1 1 1 2 3 4 5 4 3 2 2 2 2 2 3 4 5 4 3 3 3 3 3 3 3 4 5 4 4 4 4 4 4 4 4 4 `
Explanation

Given input have shown output.

## solution:-

#include<stdio.h>
#include<stdlib.h>
void main()
{
int r,c,a,b,i,j,k,l,m,n,p=0;
scanf(“%d%d%d%d”,&r,&c,&a,&b);
for(i=0;i<=r1;i++)
{
for(j=0;j<=c1;j++)
{
if(i==a&&j==b)
printf(“%d “,p);
else
{
l=abs(ai);
k=abs(bj);
m=p+l;
n=p+k;
if(l>=k)
{
if(m>=0)
printf(“%d “,m);
else printf(“0 “);
}
else
{
if(n>=0)
printf(“%d “,n);
else
printf(“0 “);
}

}

}
printf(“n”);
}
}