Given two strings, find if we can make first string from second by deleting some characters from second and rearranging remaining characters.
Input : s1 = ABHISHEKsinGH : s2 = gfhfBHkooIHnfndSHEKsiAnG Output : Possible Input : s1 = Hello : s2 = dnaKfhelddf Output : Not Possible Input : s1 = GeeksforGeeks : s2 = rteksfoGrdsskGeggehes Output : Possible
We basically need to find if one string contains characters which are subset of characters in second string. First we count occurrences of all characters in second string. Then we traverse through first string and reduce count of every character that is present in first. If at any moment, count becomes less than 0, we return false. If all counts remain greater than or equal to 0, we return true.
Time complexity is: O(n)
This article is contributed by Prabhat kumar singh. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
- Return maximum occurring character in an input string
- Print all the duplicates in the input string
- Remove characters from the first string which are present in the second string
- Remove duplicates from a given string
- Print reverse of a string using recursion
- Write a program to print all permutations of a given string
- Divide a string in N equal parts
- Given a string, find its first non-repeating character
- Write a program to reverse an array or string
- Print list items containing all characters of a given word
- Reverse words in a given string
- Find the smallest window in a string containing all characters of another string
- Length of the longest substring without repeating characters
- Print all permutations with repetition of characters
- Interleaving of two given strings with no common characters