Coded Alphabet

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A friend of Arun has challenged him to crack the code of an encrypted alphabet. The friend has sent him a big file with more than 2000 words in encrypted form and has asked him to decode the file into the original words. Friend has also sent the following snippet of the function he used to encrypt the file. char N A 0 B 1 C 3 D 6 E 10 F 15 G 21 H 28 I 36 J 45 K 55 . . . Y 300 Z

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L1 Observation

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L3 Approach

L4 Pseudo-code

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L5 Full solution

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solution.cppC++17

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