Python | Count the array elements with factors less than or equal to the factors of given x
Last Updated :
12 Jun, 2022
Given an array, the task is to count the elements of array whose factors are less than the given number x. Examples:
Input: arr = [2, 12, 4, 6], x = 6 Output: 2 factors of x = 6 is [1, 2, 3] factors of arr[0] = 2 is [1] factors of arr[1] = 12 is [1, 2, 3, 4] factors of arr[2] = 4 is [1, 2] factors of arr[3] = 6 is [1, 2, 3] so only arr[0] and arr[2] are the answer.
Approach: Find out factors of all the elements and that of given xand after that compare all of them if factors of elements are less than that of factors of x, then increment the count. Below is the implementation of above problem –
Python3
from math import ceil, sqrt
def factorscount(x):
count = 0
for i in range ( 1 ,ceil(sqrt(x))):
if x % i = = i:
count + = 1
else :
count + = 2
return count
def Totalcount(arr, x):
count_fac = factorscount(x)
arr_fac = [factorscount(i) for i in arr]
ans = 0
for i in arr_fac:
if i<count_fac:
ans + = 1
return ans
arr = [ 2 , 12 , 4 , 6 ]
x = 6
print (Totalcount(arr, x))
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Time Complexity: O(?x+n?k) where n is the size of the array, x is the given number, and k is the maximum element in the array.
Auxiliary Space: O(n)
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