Python – Capitalize repeated characters in a string
Given an input string with lowercase letters, the task is to write a python program to identify the repeated characters in the string and capitalize them.
Examples:
Input: programming language
Output: pRoGRAMMiNG lANGuAGe
Explanation: r,m,n,a,g are repeated elements
Input: geeks for geeks
Output: GEEKS for GEEKS
Expalanation: g,e,k,s are repeated elements
Approach:
- We have to keep the character of a string as a key and the frequency of each character of the string as a value in the dictionary.
- Traverse the string and check the frequency of each character using a dictionary if the frequency of the character is greater than one then change the character to the uppercase using the upper() function.
Implementation:
Python3
# function for changing the # repated characters to uppercase def RepeatedUpper(s): # declaring dictionary dic = {} # Traversing the string for i in s: # If the character is already # present in dictionary then increment # the frequency of the character if i in dic: dic[i] = dic[i]+1 # If the character is not present in # the dictionary then inserting # the character in the dictionary else: dic[i] = 1 ans = '' # traversing the string for i in s: # if the frequency of the character is # greater than one if dic[i] > 1: # change into uppercase i = i.upper() # appending each character to the ans ans = ans+i return ans # Driver code s = 'geeks for geeks'# fuction call print(RepeatedUpper(s)) |
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Output:
GEEKS for GEEKS
Time Complexity: O(n)
Space Complexity: O(n)
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