Given an array of numbers nums, in which exactly two elements appear only once and all the other ...
利用bitwise XOR的特點,n個數 或 ,如果 的個數為奇數,則n個數bitwise XOR結果為 ,否則為 先將所有的數異或,得到的將是x和y以后之后的值n。 找到這個數n的為 的某一位 為了方便就取最右邊為 的一位, n amp n ,再將這一位為 的數異或,其余的數異或,得到的就是x和y的值。 ...
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Given an array of numbers nums, in which exactly two elements appear only once and all the other ...
Coins in a Line III There are n coins in a line. Two players take turns to take a coin from one of the ends of the line until there are no more ...
Given an array of integers and a number k, find k non-overlapping subarrays which have the largest sum. The number in each subarray should ...
Given an interval list which are flying and landing time of the flight. How many airplanes are on ...
Number of Islands II Given a n,m which means the row and column of the 2D matrix and an array of pair A( size k). Originally, the 2D matrix is all ...
原題地址:http://www.cnblogs.com/x1957/p/3373994.html 題意:Given an array of integers, every element appears twice except for one. Find that single one. ...
問題:找出只出現一次的數,其他數出現了三次分析:將數轉化為二進制的位,數出現了三次相當於其對應的二進制上每個位置出現了3次,這里有個抽象的地方就是,例如數中包含1,3兩個其二進制的第一位都包含1, ...
Single Number的加強班 有n個數字,除了一個只出現過一次,其他的都出現了3次! 出現兩次我們知道就是xor下就木有啦,那3次怎么搞? 我們還是用二進制位的方式來思考。 那么這些位,除去出現過一次的那個后,其他的都是3的倍數!- -我們把所有位1的個數mod 3,那么剩下 ...