Write a program to count the number of words in a file.
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Given an array of unsorted integers, determine which number appears most often.
How to detect loops in a linked list without using a data structure
Write out merge sort and apply it to two arrays of integers.
Find largest element in array without using any extra variables or any functions
Given a string that has various brackets (e.g. “{“, “(“, “[“, “}”, “)”, “]”) built into it, how would one tell that the string has a balanced number of brackets and in order?
Given any number of arrays containing numbers, write a function which finds the numbers that appear in exactly two arrays. arrays = [ [6, 2, 2, 0, 4], [5, 0, 2, 6, 7, 1], [6, 7, 9, 9], ] find_in_two(arrays) should return [2, 0, 7]
input log = [ { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 5}, { 'user': 'A', 'page': 2}, { 'user': 'A', 'page': 1}, { 'user': 'B', 'page': 2}, { 'user': 'C', 'page': 7}, { 'user': 'C', 'page': 3}, { 'user': 'A', 'page': 3}, { 'user': 'C', 'page': 1}, ] please implement discover_site_map(log) discover_site_map returns a representation of the links between pages, using whatever data structure you think is suitable: 1 -> 2, 3 2 -> 1 3 -> 1 5 -> 2 7 -> 3
Why is a manhole cover round?
Two trains, each moving at 20 miles per hour towards each other, are initially 60 miles apart. A bee starts at the front of one train, flies to the other train, then back to the first train, and so on. If the bee always flies at 30 miles per hour, how far does the bee fly before the trains collide?
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