Commit57f0d92

committed

Update

1 parente830efb commit57f0d92Copy full SHA for 57f0d92

File tree

-1

lines changed

-1

lines changed

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -95,7 +95,7 @@ std::unordered_map 底层实现为哈希，std::map 和std::multimap 的底层`
`95`	`95`
`96`	`96`	`本题咋眼一看好像和[18. 四数之](https://mp.weixin.qq.com/s/r5cgZFu0tv4grBAexdcd8A)，[15.三数之和](https://mp.weixin.qq.com/s/nQrcco8AZJV1pAOVjeIU_g)差不多，其实差很多！`
`97`	`97`
`98`		`-关键差别是本题为四个独立的数组，只要找到A[i] + B[j] + C[k] + D[l] = 0就可以，不用考虑重复问题，而[18.四数之](https://mp.weixin.qq.com/s/r5cgZFu0tv4grBAexdcd8A)，[15.三数之和](https://mp.weixin.qq.com/s/nQrcco8AZJV1pAOVjeIU_g)是一个数组（集合）里找到和为0的组合，可就难很多了！`
	`98`	`+关键差别是本题为四个独立的数组，只要找到A[i] + B[j] + C[k] + D[l] = 0就可以，不用考虑重复问题，而[18.四数之和](https://mp.weixin.qq.com/s/nQrcco8AZJV1pAOVjeIU_g)，[15.三数之和](https://mp.weixin.qq.com/s/r5cgZFu0tv4grBAexdcd8A)是一个数组（集合）里找到和为0的组合，可就难很多了！`
`99`	`99`
`100`	`100`	`用哈希法解决了两数之和，很多同学会感觉用哈希法也可以解决三数之和，四数之和。`
`101`	`101`

Comments

(0)