Peaks And Lows

Find the peaks and lows in a given array of integers.

Medium1/15/2024

Problem statement

Given an array of integers, find the local peaks and lows (local extremums) in the array. Return a string with a P for each peak, an L for each low and a - for each other element.

Notes:

Start and end elements are either peaks or lows
There are no consecutive identical numbers

Problem leaderboard

#	Size	%
#1	72 c.	Top 20%
#2	78 c.	Top 27%
#3	85 c.	Top 33%
#4	101 c.	Top 40%
#5	103 c.	Top 47%
#6	104 c.	Top 53%
#7	107 c.	Top 67%
#8	117 c.	Top 73%
#9	119 c.	Top 80%
#10	135 c.	Top 87%
#11	146 c.	Top 93%
#12	210 c.	Top 100%