text: from typing import List
  
  
  class Solution:
      def numRescueBoats(self, people: List[int], limit: int) -> int:
          res = 0
          people.sort()
  
          l, r = 0, len(people) - 1
  
          while l < r:
              res += 1
              if people[r] + people[l] <= limit:
                  l += 1
              r -= 1
  
          if l == r:
              res += 1
          return res
  