Find the stray number
You are given an odd-length array of integers, in which all of them are the same, except for one single number. Complete the method which accepts such an array, and returns that single different number. The input array will always be valid! (odd-length >= 3) Examples [1, 1, 2] ==> 2 [17, 17, 3, 17, 17, 17, 17] ==> 3 Solution: def stray(arr): import collections return [k for k, v in collections.C..
2022. 8. 19.
Find the unique number
There is an array with some numbers. All numbers are equal except for one. Try to find it! find_uniq([ 1, 1, 1, 2, 1, 1 ]) == 2 find_uniq([ 0, 0, 0.55, 0, 0 ]) == 0.55 It’s guaranteed that array contains at least 3 numbers. The tests contain some very huge arrays, so think about performance. Solution: def find_uniq(arr): n = arr[0] == arr[-1] and arr[0] or arr[1] return [i for i in arr if n != i..
2022. 8. 8.
