Problem: "p xasc. a zdmik qtng. yiy uist. easc os iye iq trmkbumk. gwv wolnrg kaqcs vi rlr."
Hint: "Robert Sedgewick"
Solution:
The problem appears to be a substitution cipher. I tried using various cipher methods such as rotation cipher and then kamasutra cipher (which I've never seen before this).
I then continued looking at more "classical" ciphers and tried applying the Vigenere Cipher. The Vigenere Cipher requires a key to encrypt and decrypt though.
I tried using the CTF's name and out came: AGAMEAMOVIESTARHISWIFENAMEOFTHECSTEXTBOOKTHEWINNERTAKESITALL.
I then looked up Sedgewick and found out he wrote many books, the common theme of which was the flag.
Solution: pragyanctf{algorithms}