leetcode 2824. Count Pairs Whose Sum is Less than Target

https://leetcode.com/problems/count-pairs-whose-sum-is-less-than-target/description/

Count Pairs Whose Sum is Less than Target - LeetCode

 

class Solution:
    def countPairs(self, nums: List[int], target: int) -> int:
        answer = 0
        for i in range(len(nums)):
            for j in range(i+1, len(nums)):
                if nums[i] + nums[j] < target:
                    answer += 1
 
        return answer