From 11c881603c875b220762f8276dbd3fedc8b5fcb1 Mon Sep 17 00:00:00 2001
From: Alexander Seiler <seileralex@gmail.com>
Date: Mon, 4 Dec 2023 19:46:28 +0100
Subject: [PATCH] [Day 4] Simplify

---
 src/day04.jl | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/day04.jl b/src/day04.jl
index aa9686e..30cc592 100644
--- a/src/day04.jl
+++ b/src/day04.jl
@@ -24,10 +24,7 @@ eval_points(nwins::Int) = nwins > 0 ? 2^(nwins - 1) : 0
 function part2(winning_numbers::Vector{Vector{Int}}, my_numbers::Vector{Vector{Int}})
     ncards = ones(Int, length(winning_numbers))
     for (i, (w, m)) ∈ enumerate(zip(winning_numbers, my_numbers))
-        ncommon = length(intersect(w, m))
-        for k = i+1:i+ncommon
-            ncards[k] += ncards[i]
-        end
+        ncards[i+1:i+length(intersect(w, m))] .+= ncards[i]
     end
     return ncards |> sum
 end