All the inputs should be placed in the input/ directory, with the name of the day (with 2 digits), such as input/01.txt or input/13.txt.
Run solution for day N with python3 python/N.py
Compile solution for day N with gcc c/N.c. A little script called run.sh is provided in the root of the repo that compiles and runs a particular solution, use as ./run.sh 07.
Default templates for C/Python are in the corresponding directories, the included new.sh script takes in a day number and makes a copy of the template / blank input files for you.