MrRoyLee的专栏

Question: Given an unsorted array of integers, you need to return maximum possible n such that the array consists at least n values greater than or equals to n. Array can contain duplicate values. 

Question: Given a Binary Search tree of integers, you need to return the number of nodes having values between two given integers. You can assume that you already have some extra information at

Question: Suppose you have a million integer numbers.  Return all possible values of a,b and c such that  a+b+c  d will be provided to you.  ex: if the numbers are 1,2,3,4,5,6,7  and d=7  [

Question:

Question: create a Random number generator without using the java in build Random class?  Solution:

Question: Given a string with multiple spaces write a function to in-place trim all spaces leaving a single space between words  e.g.  _ _ _ Hello _ _ _ World _ _ _  Hello _ World _ _ _ _

#include #include #include #include using namespace std; class QU//并查集的 { public: QU(int n) { fa=new int[n+2]; for(int i=1;i<=n;i++)fa[i]=i; cou=n; } ~QU() { delete[] fa; }