1 files changed, 7 insertions, 7 deletions
diff --git a/src/2022/day5/aoc.h b/src/2022/day5/aoc.h
index be1791e..1014bb7 100644
--- a/src/2022/day5/aoc.h
+++ b/src/2022/day5/aoc.h
@@ -1,5 +1,5 @@
 #include "common.h"
-#include <vector>
+#include <stack>
 
 namespace aoc2022 {
 
@@ -103,13 +103,13 @@ struct crate {
       }
     }
     if (mode == 2) {
-      std::vector<crate*> dx;
-      for (int x = 0; x < d[0]; x++) {
-        crate* c = take(d[1]);
-        dx.push_back(c);
+      std::stack<crate*> dx;
+      while(d[0]-- > 0) {
+        dx.push(take(d[1]));
       }
-      for (auto s = dx.size(); s > 0; s--) {
-        put(dx[s - 1], d[2]);
+      while(!dx.empty()) {
+        put(dx.top(), d[2]);
+        dx.pop();
       }
     }
   }