You are given an array with n positive integers where all values in the array are repeated except for one. Return the one that is not repeated.
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+-----------+ | 1 | 2 | 3 | +-----------+ | 4 | 5 | 6 | +-----------+ | 7 | 8 | 9 | +-----------+ | * | 0 | # | +-----------+ +---+ | U | +---+ +---+ +---+ +---+ | L | | S | | R | +---+ +---+ +---+ +---+ | D | +—+ Input String: "180*", output is the number of minimum operations needed to dial the input */ 2)How do you test login page?
Find if a word is anagram (e.g. ana is an anagram).
how many scale measurements does it take to know which ball out of 8 balls weighs more? Then how many does 28 balls take?
My strengths and weaknesses
Implement a class that can calculate the running average of a stream of input numbers up to a maximum of N numbers.
First, a mathematic question, asking about a card game with how many possible way for the combination based on the rules it given. Second, let you to print out all the combination of 3 digit numbers with no duplicate, ex. 012, 013, ....123, 124, 125...
Intersection of n sets without using a hash table.
Get numeric number out of a roman string, linear time Given: mapping I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000 Input/Output: II = 2, III = 3, IV = 4 VI, VII, VIII IX = 9 XL = 40, XLIX = 49
Getting maximum and minimun number was not difficult but getting less than n comparison was tricky.
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