Help me in solving MATADD problem

My issue

unable to solve the testcase

My code

// your code goes here
#include<stdio.h>

int main()
{
    int mat1[5][5], mat2[5][5], sum[5][5];
    int N, M, i, j;
    printf(" ");
    scanf("%d %d", & N, & M);
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < M; j++)
        {
            scanf("%d", & mat1[i][j]);
        }
    }
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < M; j++)
        {
            scanf("%d", & mat2[i][j]);
        }
    }
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < M; j++)
        {
            sum[i][j] = mat1[i][j] + mat2[i][j];
        }
    }
    for (i = 0; i < N; i++)
    {
        for (j = 0; j < M; j++)
        {
            printf("%d ", sum[i][j]);
        }
        printf("\n");

    }

}