my boring python solution:
from pathlib import Path
def main():
input = Path('input.txt').read_text().split('\n')
names = input[0].split(',')
instructions = input[-1].split(',')
print(names,instructions)
index = 0
for instruction in instructions:
dir = instruction[0]
number = int(instruction[1:])
if dir == 'L':
index -= number
if index < 0:
index = 0
else:
index += number
if index > len(names) - 1:
index = len(names) - 1
print(names[index])
index = 0
for instruction in instructions:
dir = instruction[0]
number = int(instruction[1:])
if dir == 'L':
index -= number
else:
index += number
print(names[index%(len(names))])
indexes = list(range(len(names)))
for instruction in instructions:
dir = instruction[0]
number = (int(instruction[1:]) if dir == 'R' else -int(instruction[1:])) % len(names)
indexes[0], indexes[number] = indexes[number], indexes[0]
print(names[indexes[0]])
if __name__ == "__main__":
main()
I probably should read all 3 files though. I'll hone it out later.