标签:map int Make Two char length anagram Strings make
原题链接在这里:https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram/
题目:
You are given two strings of the same length s
and t
. In one step you can choose any character of t
and replace it with another character.
Return the minimum number of steps to make t
an anagram of s
.
An Anagram of a string is a string that contains the same characters with a different (or the same) ordering.
Example 1:
Input: s = "bab", t = "aba" Output: 1 Explanation: Replace the first 'a' in t with b, t = "bba" which is anagram of s.
Example 2:
Input: s = "leetcode", t = "practice" Output: 5 Explanation: Replace 'p', 'r', 'a', 'i' and 'c' from t with proper characters to make t anagram of s.
Example 3:
Input: s = "anagram", t = "mangaar" Output: 0 Explanation: "anagram" and "mangaar" are anagrams.
Constraints:
1 <= s.length <= 5 * 104
s.length == t.length
s
andt
consist of lowercase English letters only.
题解:
One swap is to make a char c which is not in t become a char in t.
Map to count occurance in s and not in t.
For every extra char, which count is +, it could be used to swap to a char in t but not in s, which is -.
Time Complexity: O(n). n = s.length().
Space: O(1).
AC Java:
1 class Solution { 2 public int minSteps(String s, String t) { 3 int [] map = new int [26]; 4 for(int i = 0; i < s.length(); i++){ 5 map[s.charAt(i) - 'a']++; 6 map[t.charAt(i) - 'a']--; 7 } 8 9 int res = 0; 10 for(int num : map){ 11 if(num > 0){ 12 res += num; 13 } 14 } 15 16 return res; 17 } 18 }
类似Minimum Number of Steps to Make Two Strings Anagram II.
标签:map,int,Make,Two,char,length,anagram,Strings,make 来源: https://www.cnblogs.com/Dylan-Java-NYC/p/16632917.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。