LeetCode 솔루션 분류
[6/28] 1647. Minimum Deletions to Make Character Frequencies Unique
본문
Medium
265644Add to ListShareA string s is called good if there are no two different characters in s that have the same frequency.
Given a string s, return the minimum number of characters you need to delete to make s good.
The frequency of a character in a string is the number of times it appears in the string. For example, in the string "aab", the frequency of 'a' is 2, while the frequency of 'b' is 1.
Example 1:
Input: s = "aab"
Output: 0
Explanation: s is already good.
Example 2:
Input: s = "aaabbbcc" Output: 2 Explanation: You can delete two 'b's resulting in the good string "aaabcc". Another way it to delete one 'b' and one 'c' resulting in the good string "aaabbc".
Example 3:
Input: s = "ceabaacb" Output: 2 Explanation: You can delete both 'c's resulting in the good string "eabaab". Note that we only care about characters that are still in the string at the end (i.e. frequency of 0 is ignored).
Constraints:
1 <= s.length <= 105scontains only lowercase English letters.
관련자료
-
링크
댓글 1
학부유학생님의 댓글
- 익명
- 작성일
import collections
class Solution:
def minDeletions(self, s: str) -> int:
counter = collections.Counter(s)
freqs = sorted([val for key, val in counter.items()], reverse=True)
res = 0
print(freqs)
for i in range(len(freqs)-1):
if freqs[i]-freqs[i+1] < 0:
res += abs(freqs[i]-freqs[i+1])
freqs[i+1] -= abs(freqs[i]-freqs[i+1])
res += abs(freqs[i]-freqs[i+1])
if freqs[i] and freqs[i]-freqs[i+1]==0:
freqs[i+1] -= 1
res += 1
return res
