Ryan’s leetcode Blog

Remove all elements from a linked list of integers that have value  val . Example Given:  1 --> 2 --> 6 --> 3 --> 4 --> 5 ...

Given an array of numbers  nums , in which exactly two elements appear only once and all the other elements appear exactly twice. Find the ...

Given an array  nums , there is a sliding window of size  k  which is moving from the very left of the array to the very right. You can onl...

Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as  00000010100101000001111010...

Given an integer, write a function to determine if it is a power of two. public class Solution { public boolean isPowerOfTwo(int n) {...

Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the  Hamming weight ). For e...

Given an array of  n  integers  nums  and a  target , find the number of index triplets  i, j, k  with  0 <= i < j < k < n  tha...