Suggested problems

Alexa Support for Technical Hiccups – Dial Alexa Customer Service Number

Jan. 6, 2020, 1:11 p.m. by emma12

Biological Motivation

...Amazon Alexa is one such device that has made it easier for people to access their daily dose of entertainment in the form of news, songs, streaming podcasts, voice interaction, making calls, access news, and a lot more. In this league, [Alexa Support][1] aids people across the country to perform such tasks easily without facing any technical hiccups or flaws.



A string is simply an ordered collection of symbols selected from some alphabet and formed into a word; the length of a string is the number of symbols that it contains.

An example of an DNA string (whose alphabet contains the symbols A, C, G, and T) is ATGCTTCAGAAAGGTCTTACG.

Given: A DNA string $s$ of length at most 1000 nucleotides.

Return: Four integers corresponding to the number of times that the symbols A, C, G, and T occur in $s$.

Sample Dataset


Sample Output

20 12 17 21