* <p>如果是power of two, 则2进制表达中,有且仅有一个1. 可以通过移位来数1的个数 * 这里用了一个巧妙的办法, 即判断 N & (N-1) 是否为0. *@paramn *@return*/publicstaticbooleanisPowerOfTwo_3(intn){returnn >0&& ((n & (n -1)) ==0); }publicstaticvoidmain(String[] args){ S...
Power of Two Given an integer, write a function to determine if it is a power of two. Credits: Special thanks to@jianchao.li.fighterfor adding this problem and creating all test cases. Hide Tags MathBit Manipulation n是正数并且n的二进制只有一个1,那么n就是2的幂。所以如果 n > 0 && n ...
// Solution 1: This is a very challenging problem, maybe because it looked like one and proved exactly to be one. It's among the last few problem I solved on LeetCode. It took me hours to think it through and another 1 or 2 to write an acceptable version of code. A rough idea w...
There is at most one power transport line (u,v) from a node u to a node v in the net; it transports an amount 0 <= l(u,v) <= lmax(u,v) of power delivered by u to v. Let Con=Σuc(u) be the power consumed in the net. The problem is to compute the maximum value of ...
ProblemSolution 315Count of Smaller Numbers After Self 314Binary Tree Vertical Order Traversal☢ 313Super Ugly NumberC 312Burst Balloons 311Sparse Matrix Multiplication☢ 310Minimum Height Trees 309Best Time to Buy and Sell Stock with Cooldown ...
We can't remove them, because they might be needed later. This is the first challenge. The problem requests we find all possible solutions, that's the second challenge. It took me lots of time and efforts to put up a long and sloppy solution, which never got accepted. Here the solution...
Swift 371 Sum of Two Integers Easy 370 Range Addition ♥ Medium 369 Plus One Linked List ♥ Medium 368 Largest Divisible Subset Medium 367 Valid Perfect Square Medium 366 Find Leaves of Binary Tree ♥ Medium 365 Water and Jug Problem Medium Swift 364 Nested List Weight Sum II ♥ Mediu...
0365 Water and Jug Problem 30.6% Medium 0366 Find Leaves of Binary Tree 70.6% Medium 0367 Valid Perfect Square Go 41.7% Easy 0368 Largest Divisible Subset 38.1% Medium 0369 Plus One Linked List 58.2% Medium 0370 Range Addition 62.8% Medium 0371 Sum of Two Integers Go 50.7% Medium...
The val attribute for a leaf node contains the value of the region it represents. Your task is to use a quad tree to represent a given grid. The following example may help you understand the problem better: Given the 8 x 8 grid below, we want to construct the corresponding ...
0365 Water and Jug Problem 30.6% Medium 0366 Find Leaves of Binary Tree 70.6% Medium 0367 Valid Perfect Square Go 41.7% Easy 0368 Largest Divisible Subset 38.1% Medium 0369 Plus One Linked List 58.2% Medium 0370 Range Addition 62.8% Medium 0371 Sum of Two Integers Go 50.7% Medium...