[题目地址](https://leetcode.cn/problems/maximum-number-of-balls-in-a-box) 哈希表一把梭 ```golang func countBalls(lowLimit int, highLimit int) int { var ans int cnt := [46]int{} for i := lowLimit; i <= highLimit; i++{ s := 0 for x := i; x > 0; x /= 10{ s += x % 10 } cnt[s]++ ans = max(ans, cnt[s]) } return ans } ```