[Day 7] Read input only once

goggle · Jan 2, 2024 · 4be75cc · 4be75cc
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diff --git a/README.md b/README.md
@@ -16,7 +16,7 @@ This Julia package contains my solutions for [Advent of Code 2023](https://adven
 | 4 | [:white_check_mark:](https://adventofcode.com/2023/day/4) | 2.745 ms | 1.40 MiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day04.jl) |
 | 5 | [:white_check_mark:](https://adventofcode.com/2023/day/5) | 71.969 ms | 198.09 KiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day05.jl) |
 | 6 | [:white_check_mark:](https://adventofcode.com/2023/day/6) | 7.953 μs | 7.44 KiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day06.jl) |
-| 7 | [:white_check_mark:](https://adventofcode.com/2023/day/7) | 13.584 ms | 18.21 MiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day07.jl) |
+| 7 | [:white_check_mark:](https://adventofcode.com/2023/day/7) | 11.831 ms | 15.28 MiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day07.jl) |
 | 8 | [:white_check_mark:](https://adventofcode.com/2023/day/8) | 11.879 ms | 556.42 KiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day08.jl) |
 | 9 | [:white_check_mark:](https://adventofcode.com/2023/day/9) | 1.408 ms | 1.72 MiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day09.jl) |
 | 10 | [:white_check_mark:](https://adventofcode.com/2023/day/10) | 43.997 ms | 8.82 MiB | [:white_check_mark:](https://github.com/goggle/AdventOfCode2023.jl/blob/master/src/day10.jl) |

diff --git a/src/day07.jl b/src/day07.jl
@@ -16,13 +16,12 @@ end
 function day07(input::String = readInput(joinpath(@__DIR__, "..", "data", "day07.txt")))
     hands = [Hand([_to_value(c) for c ∈ x[1]], parse(Int, x[2])) for x ∈ split.(eachsplit(rstrip(input), "\n"), " ")]
     p1 = solve(hands)
-    handsp2 = [Handp2([_to_value(c; p2=true) for c ∈ x[1]], parse(Int, x[2])) for x ∈ split.(eachsplit(rstrip(input), "\n"), " ")]
+    handsp2 = map(y -> Handp2(map(x -> x == 11 ? 1 : x, y.cards), y.bid), hands)
     p2 = solve(handsp2)
     return [p1, p2]
 end
 
-function _to_value(c::Char; p2 = false)
-    p2 && c == 'J' && return Int8(1)
+function _to_value(c::Char)
     isdigit(c) && return Int8(c - '0')
     c == 'T' && return Int8(10)
     c == 'J' && return Int8(11)