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Day 2 #3

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Dec 3, 2024
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1,000 changes: 1,000 additions & 0 deletions day2/data.txt

Large diffs are not rendered by default.

37 changes: 37 additions & 0 deletions day2/part-1.py
Original file line number Diff line number Diff line change
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import pandas as pd
import os

data_path = os.path.join(os.getcwd(), "data.txt")
reports_df = pd.read_csv(data_path, header=None, sep=" ", names=range(0, 8))


def verify_levels_safety(levels):
safe = True

for index in range(levels.shape[0]):
if index == 0:
continue

diff = abs(levels.iloc[index - 1] - levels.iloc[index])

if diff == 0 or diff > 3:
safe = False
break

return safe


def verify_report_safety(row):
row_no_nan = row.dropna()
row_asc = row_no_nan.sort_values(ascending=True)
row_desc = row_no_nan.sort_values(ascending=False)

if row_no_nan.equals(row_asc) or row_no_nan.equals(row_desc):
return verify_levels_safety(row_no_nan)

return False


is_safe_df = reports_df.apply(verify_report_safety, axis=1)
safe_reports_num = is_safe_df.sum()
print(safe_reports_num)
52 changes: 52 additions & 0 deletions day2/part-2.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,52 @@
import pandas as pd
import os

data_path = os.path.join(os.getcwd(), "data.txt")
reports_df = pd.read_csv(data_path, header=None, sep=" ", names=range(0, 8))


def verify_levels_safety(levels):
levels_asc = levels.sort_values(ascending=True)
levels_desc = levels.sort_values(ascending=False)

if not levels.equals(levels_asc) and not levels.equals(levels_desc):
return False

safe = True

for index in range(levels.shape[0]):
if index == 0:
continue

diff = abs(levels.iloc[index - 1] - levels.iloc[index])

if diff == 0 or diff > 3:
safe = False
break

return safe


def verify_report_safety(levels):
row_no_nan = levels.dropna()
safe = verify_levels_safety(row_no_nan)

if safe:
return True

safe_single_bad = False

for index_to_delete in range(row_no_nan.shape[0]):
levels_copy = row_no_nan.copy()
levels_single_bad = levels_copy.drop(levels_copy.iloc[[index_to_delete]].index)
safe_single_bad = verify_levels_safety(levels_single_bad)

if safe_single_bad:
break

return safe_single_bad


is_safe_df = reports_df.apply(verify_report_safety, axis=1)
safe_reports_num = is_safe_df.sum()
print(safe_reports_num)