2D Matrix - Elements Adjacent Sum - c

Given a matrix of R rows and C columns, for each element print the sum of the adjacent elements.Input Format:The first line contains RThe second line contains CNext R lines each contains C values separated by a spaceOutput Format:R lines each containing C values which represent the sum of the adjacent elements.

Boundary Conditions:

2 <= R,C <= 501 <= Matrix Elements <= 100

Example Input/Output 1:

Input:

5 5

11 11 5 6 18

12 4 16 9 19

5 20 7 5 2

20 19 7 2 11

16 18 5 16 17

Output:

11 16 17 23 6
4 28 13 35 9
20 12 25 9 5 
19 27 21 18 2
18 21 34 22 16

code:

#include<stdio.h>

#include <stdlib.h>

int main()

{

int r,c,i,j;

scanf("%d %d",&r,&c);

int a[r][c];

for(i=0;i<r;i++){

    for(j=0;j<c;j++)

    scanf("%d",&a[i][j]);

}

for(i=0;i<r;i++){

    for(j=0;j<c;j++){

        if(j==0) printf("%d ",a[i][j+1]);

        else if(j==c-1) printf("%d ",a[i][j-1]);

        else printf("%d ",a[i][j-1]+a[i][j+1]);

    }

    printf("\n");

}