Create Day5.java

Author: nsiwnf

Day5.java

@@ -0,0 +1,29 @@
+/**
+ * --- Day 5: A Maze of Twisty Trampolines, All Alike ---
+ */
+public class Day5 {
+
+  public static int part1(int[] maze) {
+    int steps = 0;
+    int i = 0;
+    while (i < maze.length) {
+      i = i + maze[i]++;
+      steps++;
+    }
+
+    return steps;
+  }
+
+  public static int part2(int[] maze) {
+    int steps = 0;
+    int i = 0;
+    while (i < maze.length) {
+      int next = i + maze[i];
+      maze[i] += (maze[i] >= 3 ? -1 : 1);
+      i = next;
+      steps++;
+    }
+
+    return steps;
+  }
+}