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 * 104s.length == t.lengths and t consist of lowercase English letters only.In this method, we need to count the frequency of each character in strings s and t. We then calculate the number of changes required in t by comparing these frequencies. Specifically, for each character, if the frequency count in s is greater than in t, those are the extra characters needed in t. The total number of these extra characters across all characters gives the result.
This C code defines a function that calculates the difference in frequency of each character between the two strings. It uses an array of size 26 to store the frequency count of characters. The function iterates through the string s to increment the frequency and then through t to decrement. The remaining positive values in the array represent the total change needed.
C++
Java
Python
C#
JavaScript
Time Complexity: O(n), where n is the length of the strings (since they are of equal length).
Space Complexity: O(1), since the space required does not depend on the input size.
Remove minimum number of characters so that two strings become anagram | GeeksforGeeks • GeeksforGeeks • 3,021 views views
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