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Given a mixed array of number and string representations of integers, add up the non-string integers and subtract this from the total of the string integers. Return as a number. Solution: def div_con(arr): x = sum(i for i in arr if isinstance(i, int)) y = sum(int(i) for i in arr if isinstance(i, str)) return x - y

Due to another of his misbehaved, the primary school's teacher of the young Gauß, Herr J.G. Büttner, to keep the bored and unruly young schoolboy Karl Friedrich Gauss busy for a good long time, while he teaching arithmetic to his mates, assigned him the problem of adding up all the whole numbers from 1 through a given number n. Your task is to help the young Carl Friedrich to solve this problem ..

Consider an array/list of sheep where some sheep may be missing from their place. We need a function that counts the number of sheep present in the array (true means present). For example, [True, True, True, False, True, True, True, True , True, False, True, False, True, False, False, True , True, True, True, True , False, False, True, True] The correct answer would be 17. Hint: Don't forget to ..

You can print your name on a billboard ad. Find out how much it will cost you. Each character has a default price of £30, but that can be different if you are given 2 parameters instead of 1. You can not use multiplier "*" operator. If your name would be Jeong-Ho Aristotelis, ad would cost £600. 20 leters * 30 = 600 (Space counts as a character). Solution: def billboard(name, price=30): return s..

You're on your way to the market when you hear beautiful music coming from a nearby street performer. The notes come together like you wouln't believe as the musician puts together patterns of tunes. As you wonder what kind of algorithm you could use to shift octaves by 8 pitches or something silly like that, it dawns on you that you have been watching the musician for some 10 odd minutes. You a..

Write a function that takes a positive integer n, sums all the cubed values from 1 to n, and returns that sum. Assume that the input n will always be a positive integer. Examples: (Input --> output) 2 --> 9 (sum of the cubes of 1 and 2 is 1 + 8) 3 --> 36 (sum of the cubes of 1, 2, and 3 is 1 + 8 + 27) Solution: int sumCubes(int n) { int result = 0; for (int i=1; i i * i * i); return l.sum; }

Task: Given a list of integers, determine whether the sum of its elements is odd or even. Give your answer as a string matching "odd" or "even". If the input array is empty consider it as: [0] (array with a zero). Examples: Input: [0] Output: "even" Input: [0, 1, 4] Output: "odd" Input: [0, -1, -5] Output: "even" Solution: String oddOrEven(List array) { int result = _sum_array(array); return res..

Messi's Goal Total Use variables to find the sum of the goals Messi scored in 3 competitions Information Messi goal scoring statistics: Competition Goals La Liga 43 Champions League 10 Copa del Rey 5 Task Create these three variables and store the appropriate values using the table above: la_liga_goals champions_league_goals copa_del_rey_goals Create a fourth variable named total_goals that stor..

Given an array of integers as strings and numbers, return the sum of the array values as if all were numbers. Return your answer as a number. sum_mix = lambda x: sum(map(int, x))

Suzuki is a monk who climbs a large staircase to the monastery as part of a ritual. Some days he climbs more stairs than others depending on the number of students he must train in the morning. He is curious how many stairs might be climbed over the next 20 years and has spent a year marking down his daily progress. The sum of all the stairs logged in a year will be used for estimating the numbe..