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400. Nth Digit
Problem Find the nth digit of the infinite integer sequence 1, 2, 3, 4, ...
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389. Find the Difference
Problem Given two strings s and t which consist of only lowercase letter...
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387. First Unique Character in a String
Problem Given a string, find the first non-repeating character in it and...
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383. Ransom Note
Problem Given an arbitrary ransom note string and another string contain...
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374. Guess Number Higher or Lower
Problem We are playing the Guess Game. The game is as follows:I pick a n...
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371. Sum of Two Integers
Problem Calculate the sum of two integers a and b, but you are not allow...
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367. Valid Perfect SquareProblem Given a positive integer num, write a function which returns Tru...
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350. Intersection of Two Arrays II
Problem Given two arrays, write a function to compute their intersection...
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349. Intersection of Two ArraysProblem Given two arrays, write a function to compute their intersection...