Nombre d'occurance Matrice en language C

#include <stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    int arr[50][50],n,i,j;
    int num,count;

    printf("Enter total number of elements: ");
    scanf("%d",&n);

    //read array elements
    printf("Enter array elements:\n");
    for(i=0;i< n;i++)
        for(j=0;j< n;j++)
    {
        printf("Enter element %d: ",i+1,j+1);
        scanf("%d",&arr[i][j]);
    }

    printf("Enter number to find Occurrence: ");
    scanf("%d",&num);

    //count occurance of num
    count=0;
    for(i=0;i< n;i++)
        for(j=0;j< n;j++)
    {
        if((arr[i]==num)&&(arr[j]==num))
            count++;
    }
    printf("Occurrence of %d is: %d\n",num,count);
    return 0;
}