Added countUncollectedStones for avoiding endless loops.

src/SnakeBot.java

@@ -13,7 +13,7 @@
 public class SnakeBot extends Bot{
     String moves = "";
     private int spiralNumber = 0;
-    private boolean ignoreStone = false;
+    private boolean ignoreStones = false;
     public static void main(String[] args) {
         Bot snakeBot = new SnakeBot(args);
         snakeBot.run();
@@ -26,19 +26,35 @@ public class SnakeBot extends Bot{
     protected char nextMove(View view) {
         boolean stoneDetected = view.data.contains("@");
         char nextMove;
-        nextMove = (stoneDetected && !ignoreStone) ? goToStone(view) : walkBySpiral(view);
+        nextMove = (stoneDetected && !ignoreStones) ? goToStone(view) : walkBySpiral(view);
 
         int centerCoordinateOfView = view.width / 2;
         int frontCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView, centerCoordinateOfView - 1);
 
         if(nextMove == '^' && view.data.charAt(frontCellIndex) == '*'){
             nextMove = (countCollectedStonesLeft(view) <= countCollectedStonesRight(view)) ? '<' : '>';
-            ignoreStone = true;
+            ignoreStones = true;
         }
-        if(countCollectedStones(view) <= 2) ignoreStone = false;
+        /*
+         * @TODO:
+         * Avoiding endless loops due to trying to collect two stones at once.
+         * Problem: stones located near to each other are ignored.
+         */
+        if(countUncollectedStones(view) > 1) ignoreStones = true;
+        if(countCollectedStones(view) <= 2 && countUncollectedStones(view) <= 1) ignoreStones = false;
+
         return nextMove;
     }
 
+    private int countUncollectedStones(View view) {
+        int count = 0;
+
+        for (char c : view.data.toCharArray()) {
+            if (c == '@') count++;
+        }
+        return count;
+    }
+
     private int countCollectedStonesLeft(View view) {
         int[] leftSide = generateLeftSideArray(view.width);
         int stones = 0;
@@ -61,9 +77,7 @@ public class SnakeBot extends Bot{
         int count = 0;
 
         for (char c : view.data.toCharArray()) {
-            if (c == '*') {
-                count++;
-            }
+            if (c == '*') count++;
         }
         return count;
     }