acm.jlu.edu.cn-1068-Cipher

Bob and Alice started to use a brand-new encoding scheme. Surprisingly it is not a Public Key Crypto

Maya Calendar During his last sabbatical, professor M. A. Ya made a surprising discovery about the o

Tree Recovery Little Valentine liked playing with binary trees very much. Her favorite game was cons

All in All You have devised a new encryption technique which encodes a message by inserting betwe

System Overload Recently you must have experienced that when too many people use the BBS simultane

The Dir Command We all know the dos command "dir" . It can list the files in the computer . When we

You are to write an interpreter for a simple computer. This computer uses a processor with a small n

Pascal requires that real constants have either a decimal point, or an exponent (starting with the l

The Caesar Cipher One of the simplest examples of a substitution cipher is the Caesar cipher, which

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