immjc

2018年1月5日

摘要： Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers. You may 阅读全文

posted @ 2018-01-05 22:55 immjc 阅读(171) 评论(0) 推荐(0)

[LeetCode] First Bad Version

摘要： You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality c 阅读全文

posted @ 2018-01-05 16:27 immjc 阅读(92) 评论(0) 推荐(0)

[LeetCode] Count Primes

摘要： Description: Count the number of prime numbers less than a non-negative number, n. 使用sieve of Eratosthenes方法对质数进行筛选。题目要求就是写出这个算法。原理是：给出要筛数值的范围n，找出出以阅读全文

posted @ 2018-01-05 14:58 immjc 阅读(189) 评论(0) 推荐(0)

2018年1月4日

[LeetCode] Valid Palindrome

摘要： Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal: Pan 阅读全文

posted @ 2018-01-04 23:08 immjc 阅读(109) 评论(0) 推荐(0)

[LeetCode] Third Maximum Number

摘要： Given a non-empty array of integers, return the third maximum number in this array. If it does not exist, return the maximum number. The time complexi 阅读全文

posted @ 2018-01-04 20:13 immjc 阅读(179) 评论(0) 推荐(0)

[C++] 函数指针

摘要：函数指针函数指针指向的是函数而非对象，和其他指针一样，函数指针指向某种特定类型。函数的类型由它的返回值类型和形参类型共同决定，与函数名无关。 pf指向一个函数，该函数的参数是两个const string的引用，返回值是bool类型，*pf两边的括号必不可少使用函数指针当我们把函数名作为一个值阅读全文

posted @ 2018-01-04 14:29 immjc 阅读(309) 评论(0) 推荐(0)

[LeetCode] K-diff Pairs in an Array

摘要： Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined as an inte 阅读全文

posted @ 2018-01-04 12:47 immjc 阅读(204) 评论(0) 推荐(0)

2018年1月3日

[LeetCode] License Key Formatting

摘要： You are given a license key represented as a string S which consists only alphanumeric character and dashes. The string is separated into N+1 groups b 阅读全文

posted @ 2018-01-03 22:10 immjc 阅读(224) 评论(0) 推荐(0)

[LeetCode] Largest Number At Least Twice of Others

摘要： In a given integer array nums, there is always exactly one largest element. Find whether the largest element in the array is at least twice as much as 阅读全文

posted @ 2018-01-03 20:38 immjc 阅读(234) 评论(0) 推荐(0)

[C++] 特殊用途语言特性

摘要：三种函数相关的语言特性：默认实参、内联函数、constexpr函数默认实参某些函数有这样一些形参，在函数的很多次调用中它们都被赋予一个相同的值，此时，我们把这个反复出现的值称为函数的默认实参。调用含有默认实参的函数时，可以包含该实参，也可以忽略该实参。其中我们为每个形参都提供了默认实参，默认实阅读全文

posted @ 2018-01-03 14:48 immjc 阅读(312) 评论(0) 推荐(0)

Don't live up to your ambition and sorry for your sufferings.

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