2186. Minimum Number of Steps to Make Two Strings Anagram II

Medium
You are given two strings s and t. In one step, you can append any character to either s or t.
Return the minimum number of steps to make s and t anagrams of each other.
An anagram of a string is a string that contains the same characters with a different (or the same) ordering.
Example 1:
Input: s = "leetcode", t = "coats"
Output: 7
Explanation:
- In 2 steps, we can append the letters in "as" onto s = "leetcode", forming s = "leetcodeas".
- In 5 steps, we can append the letters in "leede" onto t = "coats", forming t = "coatsleede".
"leetcodeas" and "coatsleede" are now anagrams of each other.
We used a total of 2 + 5 = 7 steps.
It can be shown that there is no way to make them anagrams of each other with less than 7 steps.
Example 2:
Input: s = "night", t = "thing"
Output: 0
Explanation: The given strings are already anagrams of each other. Thus, we do not need any further steps.
Constraints:
  • 1 <= s.length, t.length <= 2 * 10^5
  • s and t consist of lowercase English letters.

解題

答案就是兩者a-z的數量差
func minSteps(s string, t string) int {
smap := make([]int, 26)
tmap := make([]int, 26)
​
for i := 0; i < len(s); i++ {
smap[s[i] - 'a']++
}
​
for i := 0; i < len(t); i++ {
tmap[t[i] - 'a']++
}
​
ans := 0
for i := 0; i < 26; i++ {
ans += abs(smap[i] - tmap[i])
}
​
return ans
}
​
func abs(a int) int {
if a < 0 {
return -a
}
return a
}