Data Structure and Algorithms

Given two inputs: an integer array nums and an integer value target. Implement a function twoSum such that it returns the indicies of the two elements in nums that sum up to the target. Input Constraints: Length of nums will be between $2$ and $10^5$. Output Constraints: There is

Given an array of integers nums as input, implement a function containsDuplicate such that it returns true if nums contains a duplicate value and false otherwise. Input Constraints: Values in nums could range from $1$ to $10^5$ Output Constraints: Could be either true or false Naive Approach to Solution