Ex5 WTF?

void Ex5()
{
    int *arr1;
    int *arr2;
    int key=5;
    int i;
    arr1 = (int*)malloc(key*sizeof(int));
    arr2 = (int*)malloc(key*sizeof(int));
    printf("Enter Numbers for Array 1:\n");
    for(i=0;i<key;i++)
    {
        scanf("%d",&arr1[i]);
    }
    printf("Enter Numbers for Array 2:\n");

   for(i=0;i<key;i++)
   {
       scanf("%d",&arr2[i]);
   }
    printf("Returned = %d\n",Ex5_F(arr1, arr2, key));

}

int Ex5_F(int* arr1,int* arr2,int key)
{
    int *NewJoker;
    int *JokerNew;
    NewJoker = (int*)calloc(key,sizeof(int));
    JokerNew = (int*)calloc(key,sizeof(int));
    int i;
    int j;
    for(i=0,j=0;i<key;i++,j++)
    {
        NewJoker[arr1[i]]++;
        JokerNew[arr2[j]]++;

    }
    for(i=0;i<key;i++)
    {
        if(NewJoker[i] != JokerNew[i])
        {
            return 0;
        }
    }
    return 1;
}