Section 17: Hash Tables / Dictionaries question: 4sum 2 (Medium) Lecture 79 Brute force Explanation Lecture 80 Brute Force Pseudocode Walkthrough Lecture 81 Approach 2: Optimal approach Lecture 82 Implementing
Explanation: The binary representation of 1 is 1 (no leading zero bits), and its complement is 0. So you need to output 0. 具体实现 classSolution{public:intfindComplement(intnum){inti =0;while(num >=pow(2, i)) { i++; }intvalue =pow(2, i >0? i :1) -1;returnvalue ^ num; ...
那么面试官看你做到这里微微一笑,你此时意识到事情并没这么简单,第一个 follow up 来了!Follow up Question 1 你能找出每个月对应的accept_rate吗? 你想了一想那不就group by一下就完事了吗? 在刚刚的代码基础上: select ifnull(round(b.c / a.c,2),0) as accept_rate, a.month from (select count...
1.Question You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return -1. Example 1:...
Question Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. 1 2 3 Example 2: Input: "bbbbb" Output: 1 Explanation: The answer is "b", with the leng...
LeetCode 658 Find K Closest Elements Medium Good question. Using binary search to find the start index of the k window. A obvious characteristic of the final state is that the difference of left element and x should always be less than or equal to that of the right element. So we can ...
1 package Others; 2 3 import java.util.Arrays; 4 5 6 //Question 455. Assign Cookies 7 /* 8 Assume you are an awesome parent and want to give your chil
Simple simulation with follow up question 代码语言:javascript 代码运行次数:0 运行 AI代码解释 1publicintreverseBits(int n){2int res=0;34for(int i=0;i<32;i++){5int t=n&1;6n=n>>1;7res=res<<1;8res=res|t;910}11returnres;12// return Integer.reverse(n);13}1415publicintreverseBits...
69. Sqrt[x] 1.Question 2.Answer 3.大神解答 4.我的收获 1.Question Implement int sqrt(int x). Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since the return type is an integer, the decimal digits are truncated and only the integer part...