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Given two words word1 and word2, find the minimum number of steps required to make word1 and word2 the same, where in each step you can delete one cha 阅读全文
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A sequence X_1, X_2, ..., X_n is fibonacci-like if: n >= 3 X_i + X_{i+1} = X_{i+2} for all i + 2 <= n Given a strictly increasing array A of positive 阅读全文
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Starting with a positive integer N, we reorder the digits in any order (including the original order) such that the leading digit is not zero. Return 阅读全文
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Write an iterator that iterates through a run-length encoded sequence. The iterator is initialized by RLEIterator(int[] A), where A is a run-length en 阅读全文
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Given an array A of integers, return the number of (contiguous, non-empty) subarrays that have a sum divisible by K. Example 1: Input: A = [4,5,0,-2,- 阅读全文
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We have a list of points on the plane. Find the K closest points to the origin (0, 0). (Here, the distance between two points on a plane is the Euclid 阅读全文
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You are given an integer array A. From some starting index, you can make a series of jumps. The (1st, 3rd, 5th, ...) jumps in the series are called od 阅读全文
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Write a class StockSpanner which collects daily price quotes for some stock, and returns the span of that stock's price for the current day. The span 阅读全文
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Given a C++ program, remove comments from it. The program source is an array where source[i] is the i-th line of the source code. This represents the 阅读全文