You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37 lines
1.1 KiB
37 lines
1.1 KiB
lines = [[int(n) for n in l.split()] for l in open("input.txt", 'r').read().splitlines()]
|
|
|
|
unsafe, unsafe2 = 0, 0
|
|
|
|
def checksafe(report, recursive):
|
|
global unsafe, unsafe2
|
|
|
|
trend = -1 if report[0] > report[1] else 1
|
|
|
|
for i in range(len(report) -1):
|
|
if (trend == -1 and report[i] < report[i+1]) \
|
|
or (trend == 1 and report[i] > report[i+1]) \
|
|
or (report[i] == report[i+1]) \
|
|
or (abs(report[i] - report[i+1]) > 3):
|
|
if recursive:
|
|
return False
|
|
else:
|
|
unsafe += 1
|
|
# ????????? there's no way this is how this is should be done
|
|
if not (checksafe(l[:i-1] + l[i:], True) or checksafe(l[:i] + l[i+1:], True) or checksafe(l[:i+1] + l[i+2:], True)):
|
|
unsafe2 += 1
|
|
return False
|
|
return True
|
|
|
|
return True
|
|
|
|
for l in lines:
|
|
if l[0] == l[1]:
|
|
unsafe += 1
|
|
if not (checksafe(l[1:], True) or checksafe(l[:1] + l[2:], True)):
|
|
unsafe2 += 1
|
|
continue
|
|
else:
|
|
checksafe(l, False)
|
|
|
|
print(len(lines)-unsafe)
|
|
print(len(lines)-unsafe2) |