Advent of Code 2020
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HOW TO COMPILE:
Run "dub".


HOW TO RUN:
./oac-2020 [DAY] [PART] <INPUT_FILE> <DAY_SPECIFIC_ARGUMENTS...>

The program reads it input from $PWD/in/<DAY>.txt if INPUT_FILE is not specified or from stdin 
if INPUT_FILE is equal to "-".

BIG BOYS:
https://ls-a.xyz/advent/2020/bigboy.html