There is a list of subjects, a set of possible time slots for each subject and a set of rooms. Some subjects are compulsory while some are optional. Following are the constraints to satisfy.

SUB_1,o,Tu1,Tu2,F3,
SUB_2,o,M2,M3,Tu2,
.
.
.
SUB_13,c,W1,Th3,F1,
R1,R2,R3

c - Compulsory

o - Optional

• A given subjects can be assigned only to one of the possible time slots given for that subject
• A given subjects can be assigned only to one of the possible time slots given for that subject
• Two subjects cannot be assigned to the same room if they are assigned to the same time slot

source: Programiz

Backtracking is a general algorithmic strategy for solving computing problems that takes into consideration looking through all possible combinations.

# macOS/Linux
# You may need to run sudo apt-get install python3-venv first
python3 -m venv .venv

# Windows
# You can also use py -3 -m venv .venv
python -m venv .venv

1. `ctrl` + `shift` + `p` and select Python Interpreter
2. Select the `enter interpreter path`
3. Browse and select `.venv/Scripts/python.exe`

If you want to manually specify a default interpreter that will be used once you first open your workspace, you can create or modify an entry for python.defaultInterpreterPath setting in your workspace settings.json with the full path to the Python executable.

In settings.json

{
  "python.defaultInterpreterPath": "YOUR_PATH/.venv/Scripts/python.exe"
}

python main.py Input.csv Output.csv

SUB_1, Tu1, R1
SUB_2, M2, R1
.
.
SUB_13, F1, R1