Minimum Amount of Coins Required to Make up an Amount

You are given an infinite number of coins of different denominations and an amount. Find the minimum number of coins required to make up that amount.

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Maximize Sum of Subsequence with Condition

Given an array of integers, maximize sub of subsequence such that the sum of any two elements in the subsequence is greater than or equal to any other element.

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Merge k Sorted Linked Lists

Given k sorted linked list, merge those list to form a final sorted linked list.

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Sum of Two Integers without Arithmetic Operators

Add two integers without using Arithmetic Operators.

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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.

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Count 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.

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Check if Duplicate Element Exists in an Array

Given an array of integers, check if the array contains any duplicates.

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Print Matrix in Spiral Order

Given a matrix, print all elements in spiral order.

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