81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
|
file = open("input.txt", "r").read()
|
||
|
|
lines = file.split("\n")
|
||
|
|
reports = []
|
||
|
|
for line in lines:
|
||
|
|
nums = line.split(" ")
|
||
|
|
nums = [int(num) for num in nums]
|
||
|
|
reports.append(nums)
|
||
|
|
|
||
|
|
total_safe = 0
|
||
|
|
safe_nums = [1, 2, 3]
|
||
|
|
|
||
|
|
for report in reports:
|
||
|
|
dists = [report[i+1] - report[i] for i in range(len(report)) if i != len(report) - 1]
|
||
|
|
# dists is either all positive or all negative (checks all increasing or all decreasing)
|
||
|
|
if all([dist > 0 for dist in dists]) or all([dist < 0 for dist in dists]):
|
||
|
|
dists = [abs(dist) for dist in dists]
|
||
|
|
if all([dist in safe_nums for dist in dists]):
|
||
|
|
total_safe += 1
|
||
|
|
|
||
|
|
print("Total safe reports: ", total_safe)
|
||
|
|
|
||
|
|
total_safe_tolerance = 0
|
||
|
|
for report in reports:
|
||
|
|
print("Checking report: ", report)
|
||
|
|
dists = [report[i+1] - report[i] for i in range(len(report)) if i != len(report) - 1]
|
||
|
|
for i in range(len(dists)):
|
||
|
|
if abs(dists[i]) not in safe_nums:
|
||
|
|
report_copy = report.copy()
|
||
|
|
report_copy.pop(i+1)
|
||
|
|
dists_copy = [report_copy[i+1] - report_copy[i] for i in range(len(report_copy)) if i != len(report_copy) - 1]
|
||
|
|
if all([dist > 0 for dist in dists_copy]) or all([dist < 0 for dist in dists_copy]):
|
||
|
|
dists_copy = [abs(dist) for dist in dists_copy]
|
||
|
|
if all([dist in safe_nums for dist in dists_copy]):
|
||
|
|
print("Popping (dist): ", report[i+1])
|
||
|
|
report.pop(i+1)
|
||
|
|
else:
|
||
|
|
print("Popping (dist): ", report[i])
|
||
|
|
report.pop(i)
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
# make a list comprehension that makes the list a 0 if its negative and a 1 if its positive and then if the sum is 1 or len(dists) - 1 then its safe
|
||
|
|
lst = [0 if dist < 0 else 1 for dist in dists]
|
||
|
|
if sum(lst) == 1: # Only one positive
|
||
|
|
for i in range(len(report)):
|
||
|
|
if dists[i] > 0:
|
||
|
|
report_copy = report.copy()
|
||
|
|
report_copy.pop(i+1)
|
||
|
|
dists_copy = [report_copy[i+1] - report_copy[i] for i in range(len(report_copy)) if i != len(report_copy) - 1]
|
||
|
|
if all([dist > 0 for dist in dists_copy]) or all([dist < 0 for dist in dists_copy]):
|
||
|
|
dists_copy = [abs(dist) for dist in dists_copy]
|
||
|
|
if all([dist in safe_nums for dist in dists_copy]):
|
||
|
|
print("Popping (asce): ", report[i+1])
|
||
|
|
report.pop(i+1)
|
||
|
|
else:
|
||
|
|
print("Popping (asce): ", report[i])
|
||
|
|
report.pop(i)
|
||
|
|
break
|
||
|
|
elif sum(lst) == len(dists) - 1: # Only one negative
|
||
|
|
for i in range(len(report)):
|
||
|
|
if dists[i] < 0:
|
||
|
|
report_copy = report.copy()
|
||
|
|
report_copy.pop(i+1)
|
||
|
|
dists_copy = [report_copy[i+1] - report_copy[i] for i in range(len(report_copy)) if i != len(report_copy) - 1]
|
||
|
|
if all([dist > 0 for dist in dists_copy]) or all([dist < 0 for dist in dists_copy]):
|
||
|
|
dists_copy = [abs(dist) for dist in dists_copy]
|
||
|
|
if all([dist in safe_nums for dist in dists_copy]):
|
||
|
|
print("Popping (desc): ", report[i+1])
|
||
|
|
report.pop(i+1)
|
||
|
|
else:
|
||
|
|
print("Popping (desc): ", report[i])
|
||
|
|
report.pop(i)
|
||
|
|
break
|
||
|
|
dists = [report[i+1] - report[i] for i in range(len(report)) if i != len(report) - 1]
|
||
|
|
# dists is either all positive or all negative (checks all increasing or all decreasing)
|
||
|
|
if all([dist > 0 for dist in dists]) or all([dist < 0 for dist in dists]):
|
||
|
|
dists = [abs(dist) for dist in dists]
|
||
|
|
if all([dist in safe_nums for dist in dists]):
|
||
|
|
print("Safe report: ", report)
|
||
|
|
total_safe_tolerance += 1
|
||
|
|
|
||
|
|
print("Total safe reports with tolerance: ", total_safe_tolerance)
|