{"id":27084,"date":"2018-01-02T22:09:58","date_gmt":"2018-01-02T16:39:58","guid":{"rendered":"https:\/\/www.wikitechy.com\/technology\/?p=27084"},"modified":"2018-01-02T22:09:58","modified_gmt":"2018-01-02T16:39:58","slug":"write-function-counts-number-times-given-int-occurs-linked-list","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/technology\/write-function-counts-number-times-given-int-occurs-linked-list\/","title":{"rendered":"Python Algorithm – Write a function that counts the number of times a given int occurs in a Linked List"},"content":{"rendered":"

Given a singly linked list and a key, count number of occurrences of given key in linked list. For example, if given linked list is 1->2->1->2->1->3->1 and given key is 1, then output should be 4.<\/p>\n

Algorithm:<\/strong><\/p>\n

1. Initialize count as zero.\r\n2. Loop through each element of linked list:\r\n     a) If element data is equal to the passed number then\r\n        increment the count.\r\n3. Return count. \r\n<\/pre>\n
Python Programming:<\/strong><\/p>\n
 
 <\/div> 
# Python program to count the number of time a given# int occurs in a linked list # Node class class Node:     # Constructor to initialize the node object    def __init__(self, data):        self.data = data        self.next = None class LinkedList:     # Function to initialize head    def __init__(self):        self.head = None     # Counts the no . of occurances of a node    # (seach_for) in a linkded list (head)    def count(self, search_for):        current = self.head        count = 0        while(current is not None):            if current.data == search_for:                count += 1            current = current.next        return count     # Function to insert a new node at the beginning    def push(self, new_data):        new_node = Node(new_data)        new_node.next = self.head        self.head = new_node     # Utility function to print the linked LinkedList    def printList(self):        temp = self.head        while(temp):            print temp.data,            temp = temp.next  # Driver programllist = LinkedList()llist.push(1)llist.push(3)llist.push(1)llist.push(2)llist.push(1) # Check for the count functionprint "count of 1 is %d" %(llist.count(1)) # This code is contributed by Nikhil Kumar Singh(nickzuck_007)<\/code><\/pre> <\/div>\n
Output:<\/strong><\/p>\n
count of 1 is 3<\/pre>\n
Time Complexity:<\/strong> O(n)
\nAuxiliary Space:<\/strong> O(1)<\/p>\n[ad type=”banner”]\n","protected":false},"excerpt":{"rendered":"
Python Algorithm – Write a function that counts the number of times a given int occurs in a Linked List – Linked List – Given a singly linked list and a key<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79476,79478],"tags":[80781,80785,80783,80788,80240,80782,80786,80787,80790,80789,80784],"class_list":["post-27084","post","type-post","status-publish","format-standard","hentry","category-linked-list","category-singly-linked-list","tag-algorithm-to-count-the-number-of-nodes-in-linked-list","tag-c-program-to-count-repeated-number-in-an-array","tag-count-nodes-in-linked-list-c","tag-count-the-number-of-nodes-in-a-doubly-linked-list","tag-find-length-of-linked-list-java","tag-how-to-count-the-number-of-nodes-in-a-linked-list-java","tag-linked-list-count-java","tag-pseudo-code-to-delete-a-singly-linked-list","tag-pseudocode-to-delete-a-singly-linked-list","tag-write-a-program-to-count-the-number-of-times-an-item-is-present-in-a-linked-list","tag-write-a-python-program-that-accept-a-word-from-the-user-and-reverse-it"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/27084","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=27084"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/27084\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=27084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=27084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=27084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}