Problem Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, ...
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400. Nth Digit
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389. Find the Difference
Problem Given two strings s and t which consist of only lowercase letters.String t is g...
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387. First Unique Character in a String
Problem Given a string, find the first non-repeating character in it and return it's in...
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383. Ransom Note
Problem Given an arbitrary ransom note string and another string containing letters fro...
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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 number from 1 to...
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371. Sum of Two Integers
Problem Calculate the sum of two integers a and b, but you are not allowed to use the o...
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367. Valid Perfect SquareProblem Given a positive integer num, write a function which returns True if num is a p...
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350. Intersection of Two Arrays II
Problem Given two arrays, write a function to compute their intersection.Note: Each ele...
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349. Intersection of Two ArraysProblem Given two arrays, write a function to compute their intersection.Note: Each ele...