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Super Ugly NumberWrite a program to find the nthsuper ugly number.Super ugly numbers are positive numbers whose all prime factors are in the given pri... 阅读全文
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Permutations IIGiven a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the follow... 阅读全文
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Next PermutationImplement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangemen... 阅读全文
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Burst BalloonsGivennballoons, indexed from0ton-1. Each balloon is painted with a number on it represented by arraynums. You are asked to burst all the... 阅读全文
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Minimum Height TreesFor a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Amon... 阅读全文
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LeetCode Problems List没有统计数量的功能，顺手写了一个。下面两段只是用jquery调整网页上显示的内容，刷新网页就没用了。比如想看题目里一共有多少Easy, Medium和Hard，就在浏览器Console中运行下面的代码。还有一种用法，比如看还有多少没做，或者没做的题中有多少... 阅读全文
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PermutationsGiven a collection of numbers, return all possible permutations.For example,[1,2,3]have the following permutations:[1,2,3],[1,3,2],[2,1,3]... 阅读全文
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Range Sum Query - MutableGiven an integer arraynums, find the sum of the elements between indicesiandj(i≤j), inclusive.Theupdate(i, val)function modif... 阅读全文
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Additive NumberAdditive number is a positive integer whose digits can form additive sequence.A valid additive sequence should containat leastthree num... 阅读全文
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The Skyline ProblemA city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Now s... 阅读全文