2022 day23 part1

1 files changed, 23 insertions, 1 deletions

diff --git a/src/2022/day23/aoc.cpp b/src/2022/day23/aoc.cpp
index 48a2099..8b9d091 100644
--- a/src/2022/day23/aoc.cpp
+++ b/src/2022/day23/aoc.cpp
@@ -84,7 +84,29 @@ bool east_three(elf e, const std::set<elf>& elves) {
 struct elf_test {
   elf_predicate p;
   elf_move m;
-} moves[5] = {{eight, nomove}, {north_three, north}, {south_three, south}, {west_three, west}, {east_three, east}};
+} moves[4] = {{north_three, north}, {south_three, south}, {west_three, west}, {east_three, east}};
+
+std::vector<elf> round(int i, const std::vector<elf>& elfs, const std::set<elf>& elves) {
+  std::vector<elf> next;
+  elf_test top{eight, nomove};
+  for (auto& e : elfs) {
+    if (top.p(e, elves)) {
+      next.emplace_back(top.m(e));
+    }
+    else {
+      for (int x = 0; x < 4; x++) {
+        int index = (i + x) % 4;
+        if (moves[index].p(e, elves)) {
+          next.emplace_back(moves[index].m(e));
+          break;
+        }
+      }
+    }
+  }
+
+  // check duplicate of next
+  return next;
+}
 
 std::pair<int, int> day23(line_view file) {
   int height{0};