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Day 06

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Aeryn
2024-12-06 11:38:13 +01:00
parent b0a880eb79
commit 41da72781b
2 changed files with 275 additions and 0 deletions
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2024/06/06.py Normal file
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import copy
import time
def makeMap(arr):
for i in range(0, len(arr)):
if "^" in arr[i]:
loc = [i, arr[i].index("^")]
break
flag = True
while flag:
match arr[loc[0]][loc[1]]:
case "^":
if loc[0] == 0:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0] - 1][loc[1]] == "#":
arr[loc[0]][loc[1]] = ">"
else:
arr[loc[0] - 1][loc[1]] = "^"
arr[loc[0]][loc[1]] = "X"
loc[0] -= 1
case ">":
if loc[1] == len(arr[loc[0]]) - 1:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0]][loc[1] + 1] == "#":
arr[loc[0]][loc[1]] = "V"
else:
arr[loc[0]][loc[1] + 1] = ">"
arr[loc[0]][loc[1]] = "X"
loc[1] += 1
case "V":
if loc[0] == len(arr) - 1:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0] + 1][loc[1]] == "#":
arr[loc[0]][loc[1]] = "<"
else:
arr[loc[0] + 1][loc[1]] = "V"
arr[loc[0]][loc[1]] = "X"
loc[0] += 1
case "<":
if loc[1] == 0:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0]][loc[1] - 1] == "#":
arr[loc[0]][loc[1]] = "^"
else:
arr[loc[0]][loc[1] - 1] = "<"
arr[loc[0]][loc[1]] = "X"
loc[1] -= 1
case _:
print("THIS IS AN ERROR")
return arr
def check(arr):
loc = []
pastlocs = []
for i in range(0, len(arr)):
if "^" in arr[i]:
loc = [i, arr[i].index("^")]
break
flag = True
while flag:
if [loc,arr[loc[0]][loc[1]]] in pastlocs:
return -1
match arr[loc[0]][loc[1]]:
case "^":
if loc[0] == 0:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0] - 1][loc[1]] == "#":
arr[loc[0]][loc[1]] = ">"
else:
pastlocs.append([copy.deepcopy(loc), arr[loc[0]][loc[1]]])
arr[loc[0] - 1][loc[1]] = "^"
arr[loc[0]][loc[1]] = "X"
loc[0] -= 1
case ">":
if loc[1] == len(arr[loc[0]]) - 1:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0]][loc[1] + 1] == "#":
arr[loc[0]][loc[1]] = "V"
else:
pastlocs.append([copy.deepcopy(loc), arr[loc[0]][loc[1]]])
arr[loc[0]][loc[1] + 1] = ">"
arr[loc[0]][loc[1]] = "X"
loc[1] += 1
case "V":
if loc[0] == len(arr) - 1:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0] + 1][loc[1]] == "#":
arr[loc[0]][loc[1]] = "<"
else:
pastlocs.append([copy.deepcopy(loc), arr[loc[0]][loc[1]]])
arr[loc[0] + 1][loc[1]] = "V"
arr[loc[0]][loc[1]] = "X"
loc[0] += 1
case "<":
if loc[1] == 0:
flag = False
arr[loc[0]][loc[1]] = "X"
elif arr[loc[0]][loc[1] - 1] == "#":
arr[loc[0]][loc[1]] = "^"
else:
pastlocs.append([copy.deepcopy(loc), arr[loc[0]][loc[1]]])
arr[loc[0]][loc[1] - 1] = "<"
arr[loc[0]][loc[1]] = "X"
loc[1] -= 1
case _:
print("THIS IS AN ERROR")
ctr = 0
for l in arr:
for a in l:
ctr += 1 if a == "X" else 0
return ctr
def obstruct(arr):
ctr = 0
start = time.time()
map = makeMap(copy.deepcopy(arr))
for i in range(0,len(arr)):
spent = time.time() - start
print("After "+str(int(spent))+" seconds, checking "+str(i)+" out of "+str(len(arr)))
for j in range(0,len(arr[i])):
if map[i][j] == "X" and arr[i][j] != "^":
tmpArr = copy.deepcopy(arr)
tmpArr[i][j] = "#"
if check(tmpArr) == -1:
ctr += 1
return ctr
arr = []
with open("input06.txt") as file:
for line in file:
arr.append([])
for a in line:
if a != "\n":
arr[-1].append(a)
out = check(copy.deepcopy(arr))
print("Without new obstructions, the amount of positions the guard passes before exiting is: "+str(out))
out = obstruct(copy.deepcopy(arr))
print("Amount of positions a new obstruction can make the guard loop is: "+str(out))