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brainfuck_interpreter

An interpreter in C for the language brainfuck.

catscrossriver

Six cats, A, B, C, a, b, c, are crossing a river. The only way to get across is by the mere one boat in that river. Among the cats, just A, B, C, and a can paddle. An uppercase cat is the mother of the corresponding lowercase cat. A lowercase cat will be eaten by any non-mother uppercase cat unless it is with its mother. Write a program to find all the methods for the cats to get across with no cats be eaten.

digitalcircuitssynthesizer

This software converts RTL verilog file which describes the behavior of a desired digital circuit module into its corresponding netlist file.

equalsx

Either insert "+", "-", or nothing into the space between any two digits from 1 to 9 sorted, you get an arithmetic expression, for instance "123 + 45 - 678 - 9". Find all the expressions that yield a value equaling X.

findmatrices

You know the sums of every row and line of a matrix. Find all the matrices that satisfy the condition.

go-wallet-sdk

joseph

The Joseph question.

letterscombination

You are supposed to give all the possible combinations of four case-sensitive letters.

nbitsgreycode

You are supposed to generate all the N-bit Grey Codes in order.

nqueens

The solution of N Queens problem, which is an extension of the Eight-Queens problem.

parsing-table-generator

As the name has described, a parsing table generator can generate a parsing table for a self made compiler.

permanentcalendar

A permanent Calendar which you can see any month of any year.

regular-expression-engine

A regular expression engine reads a regular expression string and a random string in, and tells you whether the latter matches the former.

rip

A routing simulator based on simplified RIP

scanning-table-generator

As the name has decribed, a scanning table generator can generate a scanning table for a self made compiler.