1 files changed, 21 insertions, 0 deletions
diff --git a/src/2017/day6/aoc.cpp b/src/2017/day6/aoc.cpp
index ed2d9d3..66511fd 100644
--- a/src/2017/day6/aoc.cpp
+++ b/src/2017/day6/aoc.cpp
@@ -1,5 +1,26 @@
 #include "aoc.h"
+#include <set>
 
 namespace aoc2017 {
 
+void next(int* step, memory_bank& m, std::set<memory_bank>& ms) {
+  if (ms.find(m) == ms.end()) {
+    ms.insert(m);
+    *step += 1;
+    int d{0};
+    int i = m.highest(&d);
+    // printf("%d %d %d\n", *step, i, d);
+    m.distribute(i, d);
+    next(step, m, ms);
+  }
 }
+
+int day6(line_view file) {
+  std::set<memory_bank> ms;
+  memory_bank m{file};
+  int steps{0};
+  next(&steps, m, ms);
+  return steps;
+}
+
+} // namespace aoc2017