day13.py

from functools import reduce

constraints_mapping = [[idx, int(item)] for idx, item in enumerate(constraints) if item != 'x']

def integer_solutions(bus_1, bus_2):
    offset = bus_1[0]
    increment = bus_1[1]
    delay = bus_2[0]
    mod_value = bus_2[1]
    while((offset + delay) % mod_value != 0):
        offset += increment
    return(offset, increment * mod_value)
    
reduce(integer_solutions, constraints_mapping)