Does "contiguous" do any work in the first line of the description? Is that actually a requirement somehow?

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JS: Node v14 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

people are always sorted at least in JS. Either it should be specified in the description or tests with unordered people should be added.

ok..there are only 99 people in party. then where does 182 come from ?? (182, [200, 334])

you need to refactor unit tests, made them more readable

For 6 kyu I suggest to add a performance test, e.g.:

test.assert_equals(getting_mad([0]*10**6), 0)
test.assert_equals(getting_mad(list(range(0, 2*10**6, 2))+[1]), 1)

*evil grin*

Oh, and using Test.expect is not advised, use Test.assert_equals instead!