diff --git a/problems/0454.四数相加II.md b/problems/0454.四数相加II.md index 6e916608..a7c903eb 100644 --- a/problems/0454.四数相加II.md +++ b/problems/0454.四数相加II.md @@ -192,8 +192,33 @@ var fourSumCount = function(nums1, nums2, nums3, nums4) { }; ``` +TypeScript: + +```typescript +function fourSumCount(nums1: number[], nums2: number[], nums3: number[], nums4: number[]): number { + let helperMap: Map = new Map(); + let resNum: number = 0; + let tempVal: number | undefined; + for (let i of nums1) { + for (let j of nums2) { + tempVal = helperMap.get(i + j); + helperMap.set(i + j, tempVal ? tempVal + 1 : 1); + } + } + for (let k of nums3) { + for (let l of nums4) { + tempVal = helperMap.get(0 - (k + l)); + if (tempVal) { + resNum += tempVal; + } + } + } + return resNum; +}; +``` PHP: + ```php class Solution { /**