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day06: handle no match

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Rupus Reinefjord 2022-12-06 19:27:24 +01:00
parent 93c1db7b57
commit d04337ce03
1 changed files with 2 additions and 1 deletions
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2022/day06.nim
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@ -1,11 +1,12 @@
proc decode(data: string, unique: int): int = proc decode(data: string, unique: int): int =
for i in 0..data.high: for i in 0..data.len - unique:
block inner: block inner:
let chars = data[i..i + unique - 1] let chars = data[i..i + unique - 1]
for j in 0..unique - 2: for j in 0..unique - 2:
if chars[j] in chars[j+1..^1]: if chars[j] in chars[j+1..^1]:
break inner break inner
return i + unique return i + unique
return -1
let data = stdin.readAll() let data = stdin.readAll()
echo decode(data, 4) echo decode(data, 4)