NewCoder1024

Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that t…

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. 对于这种简单的逆序问题，将输入转化为Stri…

Implement atoi which converts a string to an integer. necessary until the first non-whitespace character is found. Then, them as a numerica…

其实对这个z字型的排列，可以看做一个压栈和弹栈的过程（字符的行数），使用count进行计数，碰到栈顶和栈底切换压栈和弹栈操作即可。 要注意行数为1的特殊情况。 % of Java online submissions for ZigZag Conversion. 可以看到时间消…

Given a 32-bit signed integer, reverse digits of an integer. Assume we are dealing with an environment which could only store integers with…

Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. 在动态规划 01背包问题中，其中的知乎专栏详细的讲解了这个问题。…

There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time co…

Given a string, find the length of the longest substring without repeating characters. 首先想到使用暴力解法，即使用每个字母作为开始，分别计算当前字母的最长不重复子串。从这些最长串长度中选择最…

输入一个正整数n,输出一个最小正整数m，使得m的各位乘积等于n，若不存在，则返回-1。 当输入的数据>10时，需要分析求小于10的所有因子，而且要满足因子的个数越少越好，并且小的因子应该放在前面。当用10以内的所有因子试过之后，如果这些因子乘积不等于输入数据n，说明不存在最小正…