Editorial for Ký tự cũ


Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.

Submitting an official solution before solving the problem yourself is a bannable offence.

Authors: SPyofgame


Spoiler Alert


Hint

  • Dùng bảng ASCII tìm điểm tương ứng

Approach 1

  • Subtract (-)

\(new_c = c - 32\)

Approach 2

  • Bitwise (and not)

\(new_c = c\ \&(\sim 32)\)



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