In First But Second Python

PROGRAM TO FIND ELEMENTS WHICH ARE PRESENT IN FIRST ARRAY AND NOT IN SECOND

# Function for finding elements which 

# are there in a[] but not in b[].

def findMissing(a, b, n, m):

      

    # Store all elements of second 

    # array in a hash table

    s = dict()

    for i in range(m):

        s[b[i]] = 1

  

    # Print all elements of first array 

    # that are not present in hash table

    for i in range(n):

        if a[i] not in s.keys():

            print(a[i], end = " ")

  

# Driver code

a = [ 1, 2, 6, 3, 4, 5 ]

b = [ 2, 4, 3, 1, 0 ]

n = len(a)

m = len(b)

findMissing(a, b, n, m)







OUTPUT

6 5

CREDITS: https://www.geeksforgeeks.org/find-elements-present-first-array-not-second/