下载安装OfficeOpenXml模块 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Text.RegularEx…
454.四数相加II
Python
class Solution:def fourSumCount(self, nums1: List[int], nums2: List[int], nums3: List[int], nums4: List[int]) -> int:nlen(nums1)res0Mapdefaultdict(int)for i in range(n):for j in range(n):Map[nums1[i]nums2[j]]1for i in range(n):fo…
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)
