LeetCode 155. Min Stack
Description Design a stack that supports push, pop, top, and retrieving the minimum element in constant time. push(x) — Push…
Tag: Bloomberg Interview Question
LeetCode 69. Sqrt(x)
Description Implement int sqrt(int x). Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since the…
LeetCode 20. Valid Parentheses
Description https://leetcode.com/problems/valid-parentheses/ Given a string s containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’, determine if the input string is valid. An input string is valid…
LeetCode 8. String to Integer (atoi)
Description https://leetcode.com/problems/string-to-integer-atoi/ Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the…
LeetCode 3. Longest Substring Without Repeating Characters
Description https://leetcode.com/problems/longest-substring-without-repeating-characters/ Given a string, find the length of the longest substring without repeating characters. Example 1: Input: “abcabcbb” Output: 3 Explanation:…
LeetCode 7. Reverse Integer
Description https://leetcode.com/problems/reverse-integer/ Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 Explanation The…
LeetCode 1. Two Sum
Description https://leetcode.com/problems/two-sum/ Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.…
LeetCode 2. Add Two Numbers
Description https://leetcode.com/problems/add-two-numbers/ You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of…