Data Structures & Algorithms
Find One Missing Number in a Range
Given an array containing n distinct integers in the range [0, n], one number is missing from the array. Find the missing number.
ReadCount the Number of Set Bits for Every Number from 0 to n
Given a number n, count the number of 1's in the binary representation of each number from 0 to n.
ReadCheck if Duplicate Element Exists in an Array
Given an array of integers, check if the array contains any duplicates.
ReadFind Combinations of a List Whose Sum is Equal to a Target
Given a list of distinct integers, find all the possible combinations which sums up to a target.
ReadGenerate Spiral Matrix
Given a positive integer n, generate a square matrix filled with elements from 1 to n^2 in spiral order.
ReadMinimum Remove to Make Valid Parentheses
Given a string, remove minimum number of parentheses to make it balanced.
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