This code defines a function named isPowerOfTwo that takes an integer n as its input argument and returns a boolean value indicating whether n is a power of two or not. Here's an explanation of each line of the code: This line checks if the input in...
The given code is a function isValid that takes a string s as an input and checks whether the parentheses, brackets, and curly braces in the string are validly matched. The function returns a boolean value true if the string has validly matched paren...
This line declares the function lengthOfLastWord that takes a string s as input and returns an integer. This line initializes a variable len to 0, which will be used to keep track of the length of the last word. This line initializes a variable i t...
To merge two sorted arrays nums1 and nums2 into nums1, we can use a two-pointer approach. We will start with two pointers p1 and p2, initialized to the last valid element in nums1 and nums2 respectively. We will compare the elements at these pointers...
The approach used in this code is to calculate the sum of all the numbers in the input array nums, and then subtract it from the sum of all the numbers in the range [0, n]. The difference between these two sums is the missing number. Let's go through...
This line defines the function romanToInt, which takes a string as input and returns an integer. This line initializes an unordered map called romanValues , which maps each Roman numeral character to its corresponding integer value. These lines ini...
