随笔分类 - LintCode
摘要：Given an interval list which are flying and landing time of the flight. How many airplanes are on the sky at most? If landing and flying happens at th
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摘要：Given a non-overlapping interval list which is sorted by start point. Insert a new interval into it, make sure the list is still in order and non-over
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摘要：The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual number of characters read. For example, it retu
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摘要：Given a binary search tree and a new tree node, insert the node into the tree. You should keep the tree still be a valid binary search tree. You can a
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摘要：Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only
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摘要：Given a collection of intervals, merge all overlapping intervals. Given a collection of intervals, merge all overlapping intervals. Given a collection
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摘要：Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. Given a string containing just
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摘要：Given an integer, convert it to a roman numeral. The number is guaranteed to be within the range from 1 to 3999. Given an integer, convert it to a rom
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摘要：Given a roman numeral, convert it to an integer. The answer is guaranteed to be within the range from 1 to 3999. Given a roman numeral, convert it to
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摘要：Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents your maxim
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摘要：Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents your maxim
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摘要：Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Given a m x n matrix, if an element is 0, set its entire
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摘要：Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You have
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摘要：There is a stone game.At the beginning of the game the player picks n piles of stones in a line. The goal is to merge the stones in one pile observing
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摘要：Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occurrenc
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摘要：Write a function that add two numbers A and B. You should not use + or any arithmetic operators. There is no need to read data from standard input str
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