Suggested problems

duct cleaning services

Sept. 23, 2022, 12:25 p.m. by air conditioner repair

Biological Motivation

Mold and other germs will grow as a result of this. The majority of AC duct cleaning businesses in Dubai make grand claims about thorough [duct cleaning services][1], but did you realize that this is only feasible with specialized tools and staff?



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