4Sum II

4Sum II - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com 1. 틀림 from typing import * class Solution: def fourSumCount(self, nums1: List[int], nums2: List[int], nums3: List[int], nums4: List[int]) -> int: set1, set2 = set(), set() for num1 in nums1: for num2 in nums2: set1.add(num1 ..