Suggested problems

Aug. 16, 2022, 3:22 p.m. by charles

Biological Motivation

[][1]To activate Peacock TV, visit and enter the activation code you get from your device. The application installed on your device restarts and you'll be able to be granted the access to peacock streaming.



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