Leetcode problem 136 - Final Prices With a Special Discount in a Shop
You are given an integer array prices where prices[i] is the price of the ith item in a shop.
You are given an integer array prices where prices[i] is the price of the ith item in a shop.
Given the root of an n-ary tree, return the postorder traversal of its nodes’ values.
Given the root of a binary search tree, rearrange the tree in in-order so that the leftmost node in the tree is now the root of the tree, and every node has ...
A string is a valid parentheses string (denoted VPS) if it meets one of the following:
A valid parentheses string is either empty “”, “(“ + A + “)”, or A + B, where A and B are valid parentheses strings, and + represents string concatenation.