Digital Roots

Can Anyone Solve it ?



John is fond of writing programming scenario on his web page.So he surfed few webpages where he found an Interesting topic on "Digital Roots". He also decided to write a program for digital roots.The only clue he had is just a sample Input & output. Help him to write the program for the above..

Note:
1<n<5000;

Sample Input :

3658

Sample Output:

4


Post Author

NATARAJ K

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