Swaps in Permutation Swaps in Permutation You are given a permutation of the numbers 1,?2,?...,?n and m pairs of positions (aj,?bj). At each step you ...
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其他好文 时间：
2016-07-14 07:06:40
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138
val counts = pairs.reduceByKey(_ + _) val counts = pairs.groupByKey().map(wordCounts => (wordCounts._1, wordCounts._2.sum)) 如果能用reduceByKey，那就用reduceB ...
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其他好文 时间：
2016-07-13 20:25:58
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144
373. Find K Pairs with Smallest Sums 373. Find K Pairs with Smallest Sums Total Accepted: 1453 Total Submissions: 5789 Difficulty: Medium You are give ...
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2016-07-10 21:17:09
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236
题目链接：https://leetcode.com/problems/palindrome-pairs/
题目：
Given a list of unique words. Find all pairs of distinct indices (i,
j) in the given list, so that the concatenation of the two words, ...
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2016-07-10 18:48:22
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For an array A, if i < j, and A [i] > A [j], called (A [i], A [j]) is a reverse pair.return total of reverse pairs in A. For an array A, if i < j, and ...
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2016-07-10 13:51:31
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Given a linked list, swap every two adjacent nodes and return its head. Given a linked list, swap every two adjacent nodes and return its head. Exampl ...
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2016-07-07 00:45:50
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http://www.practice.geeksforgeeks.org/problem-page.php?pid=387 Find sum of different corresponding bits for all pairs We define f (X, Y) as number of ...
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其他好文 时间：
2016-07-06 00:14:57
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