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Source You have two numbers represented by a linked list, where each node contains a single digit. The digits are stored in reverse order, such that t 阅读全文
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Source Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preser 阅读全文
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Source Write a removeDuplicates() function which takes a list and deletes any duplicate nodes from the list. The list is not sorted. For example if th 阅读全文
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Source Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Example Given 1 阅读全文
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Source Given a sorted linked list, delete all duplicates such that each element appear only once. Example Given 1->1->2, return 1->2. Given 1->1->2->3 阅读全文
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Problem Description Given a char array representing tasks CPU need to do. It contains capital letters A to Z where different letters represent differe 阅读全文
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Problem Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be pali 阅读全文
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Source Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant dig 阅读全文
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Source Ugly number is a number that only have factors 3, 5 and 7. Design an algorithm to find the Kth ugly number. The first 5 ugly numbers are 3, 5, 阅读全文
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Source Count the number of k's between 0 and n. k can be 0 - 9. Example if n=12, k=1 in [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], we have FIVE 1's ( 阅读全文