Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example ...
Given a chemicalformula given as a string , return the count of each atom. An atomic element always starts with an uppercase character, then zero or more lowercase letters, representing the name. or ...
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Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example ...
You are standing at position 0 on an infinite number line. There is a goal at position target. On each move, you can either go left or right. ...
Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) c ...
the number of permutations of A that are squareful. ...
Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) c ...
Given string S and a dictionary of words words, find the number of words[i] that is a subsequence of S. Note: All words in words and S ...
Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n. For example: Given n = 13 ...
Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected ...