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Zynh Ludwig 2024-12-02 14:05:55 -08:00
parent 375246159d
commit 87f018ceea
1 changed files with 3 additions and 0 deletions
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day2/part2.lua
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@ -98,6 +98,7 @@ local function is_safe(report)
return unsafe, unsafe_idx_1, unsafe_idx_2
end
-- Copy the report, remove the specified index, and test if it is safe
local function test_altered_report(report, idx)
local test_report = table.shallow_copy(report)
table.remove(test_report, idx)
@ -107,9 +108,11 @@ end
local safe_count = 0
for _, report in ipairs(reports) do
-- if unsafe == true, idx1 and idx2 will be null
local unsafe, idx1, idx2 = is_safe(report)
if unsafe then
-- if the report is unsafe, generate 2 reports with the potentially bad values removed, and test them again
if not test_altered_report(report, idx1) or not test_altered_report(report, idx2) then
unsafe = false
end