ghadj

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ghadj

/**
 * ---
 * [https://leetcode.com/problems/count-good-nodes-in-binary-tree]
 * 1448. Count Good Nodes in Binary Tree
 * Given a binary tree root, a node X in the tree is named good if in the path from root to X
 * there are no nodes with a value greater than X.
 *
 * Return the number of good nodes in the binary tree.
 * ---
 */

ghadj

import java.util.Stack;

/**
 * ---
 * [https://leetcode.com/problems/decode-string]
 * 394. Decode String
 * Given an encoded string, return its decoded string.
 *
 * The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets
 * is being repeated exactly k times. Note that k is guaranteed to be a positive integer.

ghadj

/**
 * ---
 * [https://leetcode.com/problems/asteroid-collision]
 * 735. Asteroid Collision
 * We are given an array asteroids of integers representing asteroids in a row.
 *
 * For each asteroid, the absolute value represents its size, and the sign represents its 
 * direction (positive meaning right, negative meaning left). Each asteroid moves at the same speed.
 *
 * Find out the state of the asteroids after all collisions. If two asteroids meet, the smaller

ghadj

/**
 * ---
 * [https://leetcode.com/problems/removing-stars-from-a-string]
 * 2390. Removing Stars From a String
 * You are given a string s, which contains stars *.
 *
 * In one operation, you can:
 * - Choose a star in s.
 * - Remove the closest non-star character to its left, as well as remove the star itself.
 *

ghadj

/**
 * ---
 * [https://leetcode.com/problems/equal-row-and-column-pairs]
 * 2352. Equal Row and Column Pairs
 * Given a 0-indexed n x n integer matrix grid, return the number of pairs (ri, cj) such that 
 * row ri and column cj are equal.
 *
 * -not fully happy though-
 * ---
 */

ghadj

/**
 * ---
 * [https://leetcode.com/problems/determine-if-two-strings-are-close]
 * 1657. Determine if Two Strings Are Close
 * Two strings are considered close if you can attain one from the other using
 * the following operations:
 * - Operation 1: Swap any two existing characters.
 * - Operation 2: Transform every occurrence of one existing character into
 * another existing character,
 * and do the same with the other character.

ghadj

/**
 * ---
 * [https://leetcode.com/problems/unique-number-of-occurrences]
 * 1207. Unique Number of Occurrences
 * Given an array of integers arr, return true if the number of occurrences of each value in the
 * array is unique or false otherwise.
 * ---
 */
class Solution {

ghadj

/**
 * ---
 * [https://leetcode.com/problems/max-consecutive-ones-iii]
 * 1004. Max Consecutive Ones III
 * Given a binary array nums and an integer k, return the maximum number of consecutive 1's in the
 * array if you can flip at most k 0's.
 * ---
 */
class Solution {

ghadj

/**
 * ---
 * [https://leetcode.com/problems/longest-subarray-of-1s-after-deleting-one-element]
 * 1493. Longest Subarray of 1's After Deleting One Element
 * ---
 */
class Solution {

    public int longestSubarray(int[] nums) {
        int prevSubArray = 0;