problem5.py

import sys
from itertools import islice

def parse_block(fh):
    m = []
    while True:
        try:
            l = next(fh).rstrip()
        except StopIteration:
            break
        if l:
            dest, source, ran = map(int, l.split())
            m.append((source, source + ran, dest -source))
        else:
            break
    return sorted(m)

with open(sys.argv[1]) as fh:
    line = next(fh).rstrip()
    seeds = map(int, line.split(": ")[1].split())
    next(fh)
    blocks = []
    while True:
        try:
            next(fh)
        except StopIteration:
            break
        blocks.append(parse_block(fh))

def batched(iterable, n):
    # batched('ABCDEFG', 3) --> ABC DEF G
    if n < 1:
        raise ValueError('n must be at least one')
    it = iter(iterable)
    while batch := tuple(islice(it, n)):
        yield batch

breakpoint()
locs = []
for start, ran in batched(seeds, 2):
    for s in range(start, start + ran):
        for b in blocks:
            for start, end, diff in b:
                if s < start:
                    break
                if s >= start and s < end:
                    s += diff
                    break
        locs.append(s)
print(min(locs))