? Trung is bored with his mathematics homeworks. He takes a piece of chalk and starts writing a sequence of consecutive integers starting with 1 to N ...
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2021-02-01 12:17:16
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Given an integer n, return the decimal value of the binary string formed by concatenating the binary representations of 1 to n in order, modulo 109 + ...
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2021-01-29 11:41:16
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仅供自己学习 题目： The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a ...
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2021-01-27 13:14:49
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Power Strings Description Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "abcde ...
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2021-01-26 11:47:12
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Problem LeetCode Given the root of a binary tree, return the sum of every tree node's tilt. The tilt of a tree node is the absolute difference between ...
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编程语言 时间：
2021-01-25 11:29:21
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Problem LeetCode Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: I ...
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编程语言 时间：
2021-01-21 10:55:51
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Given an increasing sequence S of N integers, the median is the number at the middle position. For example, the median of S1 = { 11, 12, 13, 14 } is 1 ...
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2021-01-21 10:52:05
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题目： Monocarp had a sequence a consisting of n+m integers a1,a2,…,an+m. He painted the elements into two colors, red and blue; n elements were painted ...
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2021-01-20 12:13:42
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题目描述 Given two sorted arrays nums1 and nums2 of size m and n respectively, return the median of the two sorted arrays. Follow up: The overall run time ...
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2021-01-19 12:12:17
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Given a string , determine if it is?valid. A string is?valid?if, starting with an empty string , you can?transform into after performing the following ...
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2021-01-18 11:15:29
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