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Lambda expression is used for the implementation of the functional interfaces. Functional interface is those interfaces which has only one abstract method. We can declare an interface as functional interface by using the annotation @FunctionalInterface. e.g. Comparator interface in java is a functional interface. Please visit the official site for more information:- lambdaexpressions Example 1:-…
Check if All the Integers in a Range Are Covered You are given a 2D integer array ranges and two integers left and right. Each ranges[i] = [starti, endi] represents an inclusive interval between starti and endi. Return true if each integer in the inclusive range [left, right] is covered by at least one interval…
Check if Word Equals Summation of Two Words The letter value of a letter is its position in the alphabet starting from 0 (i.e. ‘a’ -> 0, ‘b’ -> 1, ‘c’ -> 2, etc.). The numerical value of some string of lowercase English letters s is the concatenation of the letter values of each letter…
Substrings of Size Three with Distinct Characters A string is good if there are no repeated characters. Given a string s, return the number of good substrings of length three in s. Note that if there are multiple occurrences of the same substring, every occurrence should be counted. A substring is a contiguous sequence of…
How many numbers are smaller than the current number:- Given the array nums, for each nums[i] find out how many numbers in the array are smaller than it. That is, for each nums[i] you have to count the number of valid j’s such that j != i and nums[j] < nums[i]. Return the answer in an array….
Check if the Sentence Is Pangram:- A pangram is a sentence where every letter of the English alphabet appears at least once. Given a string sentence containing only lowercase English letters, returntrue if sentence is a pangram, or false otherwise. Solution:- Flow Diagram:- Code Block:- public static boolean checkIfPangram(String sentence) { Set s = new…
Minimum Operations to Make the Array Increasing You are given an integer array nums (0-indexed). In one operation, you can choose an element of the array and increment it by 1. For example, if nums = [1,2,3], you can choose to increment nums[1] to make nums = [1,3,3]. Return the minimum number of operations needed…
Sign of the Product of an Array There is a function signFunc(x) that returns: 1 if x is positive. -1 if x is negative. 0 if x is equal to 0. You are given an integer array nums. Let product be the product of all values in the array nums. Return signFunc(product). The problem description…
Truncate Sentence A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and lowercase English letters (no punctuation). For example, “Hello World”, “HELLO”, and “hello world hello world” are all sentences. You are given a sentence s…