Question: 
Write a function to find the largest subset where each pair is divisible.


Model's Code:
def largest_subset(arr, k):
    dp = [0] * (k + 1)
    for num in arr:
        dp[num % k] += 1
    max_subset_size = 0
    for i in range(k):
        if i == 0:
            max_subset_size += 1  # Only one element can be included
        else:
            max_subset_size += min(dp[i], 1)  # Include at most one from each non-zero remainder
    return max_subset_size



Sample Correct Code:
def largest_subset(a, n):
	dp = [0 for i in range(n)]
	dp[n - 1] = 1; 
	for i in range(n - 2, -1, -1):
		mxm = 0;
		for j in range(i + 1, n):
			if a[j] % a[i] == 0 or a[i] % a[j] == 0:
				mxm = max(mxm, dp[j])
		dp[i] = 1 + mxm
	return max(dp)


Asserts:
assert largest_subset([ 1, 3, 6, 13, 17, 18 ], 6) == 4
assert largest_subset([10, 5, 3, 15, 20], 5) == 3
assert largest_subset([18, 1, 3, 6, 13, 17], 6) == 4


Tests:
Test 1 of 3: PASS
Test 2 of 3: FAIL: AssertionError()

Test 620 of 974: 461/620 (74.35483870967742%): failed