How much room is left

easyeventsJavaScript

A venue has a maximum capacity and a list of party sizes arriving. Return how many more guests can still enter.

Sum all party sizes and subtract from capacity.
If the parties already fill or exceed the room the answer is zero, never negative.
An empty party list means nobody arrived yet.

capacityLeft(capacity: int, partySizes: list<int>) → int

Where you start

function capacityLeft(capacity, partySizes) {
  
}

Sum the list, subtract from capacity, and floor at zero.

Reference solution in JavaScript

function capacityLeft(capacity, partySizes) {
  let total = 0;
  for (const s of partySizes) total += s;
  return Math.max(0, capacity - total);
}