题目 解析 ...
You are standing at position on an infinite number line. There is a goal at positiontarget. On each move, you can either go left or right. During then th move starting from , you takensteps. Return t ...
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题目 解析 ...
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 a chemical formula (given as a string), return the count of each atom. An atomic element a ...
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 ...
We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n ...
Given a non-empty array of integers, every element appears twice except for one. Find that single ...
Validate if a given string can be interpreted as a decimal number. Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => ...
Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is mis ...