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path: root/11_2023.py
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import sys
import re
from copy import deepcopy
from math import gcd
from collections import defaultdict, Counter, deque

D = open(sys.argv[1]).read().strip()
L = D.split("\n")
G = [[c for c in row] for row in L]
R = len(G)
C = len(G[0])
for r in range(R):
    assert len(G[r]) == C

EMPTY_R = []
r = 0
while r < R:
    empty = True
    for c in range(C):
        if G[r][c] == "#":
            empty = False
    if empty:
        EMPTY_R.append(r)
    r += 1
EMPTY_C = []
c = 0
while c < C:
    empty = True
    for r in range(R):
        if G[r][c] == "#":
            empty = False
    if empty:
        EMPTY_C.append(c)
    c += 1

GAL = []
for r in range(R):
    for c in range(C):
        if G[r][c] == "#":
            GAL.append((r, c))

for part2 in [False, True]:
    expansion_factor = 10**6 - 1 if part2 else 2 - 1
    ans = 0
    for i, (r, c) in enumerate(GAL):
        for j in range(i, len(GAL)):
            r2, c2 = GAL[j]
            dij = abs(r2 - r) + abs(c2 - c)
            for er in EMPTY_R:
                if min(r, r2) <= er <= max(r, r2):
                    dij += expansion_factor
            for ec in EMPTY_C:
                if min(c, c2) <= ec <= max(c, c2):
                    dij += expansion_factor
            ans += dij
    print(ans)