Given string str of size N, the task is to remove all the characters from the string that have odd frequencies.
Input: str = “geeksforgeeks”
The characters f, o, r have odd frequencies
So, they are removed from the string.
Input: str = “zzzxxweeerr”
- Create a map and store the frequency of each character from the string to the same map.
- Then, traverse the string and find out which characters have odd frequencies with the help of the map.
- Ignore all those characters which have odd frequencies and store the rest in a new string.
- Finally, display the new string.
Below is the implementation of the above approach:
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