Delete_remove

Problem Follow up for Remove duplicates from Sorted Array I: What if duplicates are allowed at most twice? OR Given an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The relative order of the elements should be kept the same. Since it is impossible to change the length of the array in some languages, you must instead have the result be placed in the first part of the array nums. More formally, if there are k elements after removing the duplicates, then the first k elements of nums should hold the final result. It does not matter what you leave beyond the first k elements. ...

Problem Given a sorted linked list, delete all duplicates such that each element appear only once. Examples Example 1: Given 1->1->2, return 1->2. Input: head = [1,1,2] Output: [1,2] ...

Problem Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relative order of the elements should be kept the same. Then return the number of unique elements in nums. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory. Note that even though we want you to return the new length, make sure to change the original array as well in place. ...

Problem Given an integer array nums and an integer val, remove all occurrences of val in nums in-place. The relative order of the elements may be changed. Since it is impossible to change the length of the array in some languages, you must instead have the result be placed in the first part of the array nums. More formally, if there are k elements after removing the duplicates, then the first k elements of nums should hold the final result. It does not matter what you leave beyond the first k elements. ...

Problem Given the head of a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Return the linked list sorted as well. Examples Example 1: Input: head = [1,2,3,3,4,4,5] Output: [1,2,5] ...

Problem Remove all elements from a linked list of integers that have value val. Example Example 1: Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6 Return: 1 --> 2 --> 3 --> 4 --> 5 ...

Problem Write a function to delete a node in a singly-linked list. You will not be given access to the head of the list, instead you will be given access to the node to be deleted directly. It is guaranteed that the node to be deleted is not a tail node in the list. Examples Example 1: graph LR; 4 --> 5 --> 1 --> 9 style 5 fill:#FF9933 ...

Problem Given a string, Write a program to remove duplicate characters from the string. Examples Example 1: Input: s = kodeknight Output: kodenight Example 2: Input: s = k5kc Output: k5c Solution There are multiple approach to solve it. Method 1 : Brute Force Code C void removeDuplicates(char *str) { if (!str) { return; } int len = strlen(str); if (len < 2){ return; } int tail = 1; for (int i = 1; i < len; ++i) { int j; for (j = 0; j < tail; ++j) if (str[i] == str[j]) { break; } if (j == tail) { str[tail] = str[i]; ++tail; } } str[tail] = '\0'; } ...

Problem Write code to remove duplicates from an unsorted linked list. FOLLOW UP: How would you solve this problem if a temporary buffer is not allowed? Examples Example 1: 2 -> 3 -> 2 -> 5 -> 2 -> 8 -> 2 -> 3 -> 8 -> null => 2 -> 3 -> 5 -> 8 -> null ...