Finished in class and more tests added

src/Position.java

@@ -0,0 +1 @@
+public record Position (int row, int col) {}

src/SalamanderSearch.java

@@ -1,5 +1,6 @@
 import java.util.ArrayList;
 import java.util.List;
+import java.util.*;
 
 public class SalamanderSearch {
     public static void main(String[] args) {
@@ -18,6 +19,23 @@ public static void main(String[] args) {
             {'f','W','.','.','W','.'},
             {'W','.','W','.','.','.'},
         };
+
+        // Set<int[]> coordinateSet = new HashSet<>();
+        // int[] coord1 = new int[]{1, 5};
+        // int [] coord2 = new int[]{3, 7};
+        // int[] coord3 = new int[]{1, 5};
+
+        // coordinateSet.add(coord1);
+        // coordinateSet.add(coord2);
+        // coordinateSet.add(coord3);
+
+        // System.out.println(coordinateSet.size());
+
+        // canReach(enclosure1); 
+
+        Position pos = new Position(3, 5);
+        System.out.println(pos.row());
+        System.out.println(pos.col());
     }
 
     /**
@@ -43,6 +61,109 @@ public static void main(String[] args) {
      * @return whether the salamander can reach the food
      */
     public static boolean canReach(char[][] enclosure) {
+        int [] start = salamanderLocation(enclosure);
+        boolean[][] visited = new boolean[enclosure.length][enclosure[0].length];
+        return canReachHelper(enclosure, start, visited);
+    }
+
+    public static boolean canReachHelper(char[][] enclosure, int[] current, boolean[][] visited) {
+        int curR = current[0];
+        int curC = current[1];
+
+        if (visited[curR][curC]) {
+            return false;
+        }
+
+        if (enclosure[curR][curC] == 'f') {
+            return true;
+        }
+
+        System.out.println(Arrays.toString(current));
+
+        visited[curR][curC] = true;
+
+        List<int[]> moves = possibleMoves(enclosure, current);
+
+        for (int[] move : moves) {
+            if (canReachHelper (enclosure, move, visited)) {
+                return true;
+            }
+        }
+
         return false;
     }
+
+    public static List<int[]> possibleMoves(char[][] enclosure, int[] current) {
+        int curR = current[0];
+        int curC = current[1];
+
+        List<int[]> moves = new ArrayList<>();
+
+        int[][] directions = new int[][] {
+            {-1, 0}, // UP
+            {1, 0},  // DOWN
+            {0, -1}, // LEFT
+            {0, 1}   // RIGHT
+        };
+
+        for(int[] direction : directions) {
+            int newR = curR + direction[0];
+            int newC = curC + direction[1];
+
+            if (newR >= 0 && newR < enclosure.length && 
+                newC >= 0 && newC < enclosure[0].length && 
+                enclosure[newR][newC] != 'W') {
+
+                moves.add(new int[]{newR, newC});
+            }
+        }
+
+        return moves;
+
+        // // UP
+        // int newR = curR - 1;
+        // int newC = curC;
+
+        // if (newR >= 0 && enclosure[newR][newC] != 'W') {
+        //     moves.add(new int[]{newR, newC});
+        // }
+
+        // // DOWN
+        // newR = curR + 1;
+        // newC = curC;
+
+        // if (newR < enclosure.length && enclosure[newR][newC] != 'W') {
+        //     moves.add(new int[]{newR, newC});
+        // }
+
+        // // LEFT
+        // newR = curR;
+        // newC = curC - 1;
+
+        // if (newC >= 0 && enclosure[newR][newC] != 'W') {
+        //     moves.add(new int[]{newR, newC});
+        // }
+
+        // // RIGHT
+        // newR = curR;
+        // newC = curC + 1;
+
+        // if (newC < enclosure[0].length && enclosure[newR][newC] != 'W') {
+        //     moves.add(new int[]{newR, newC});
+        // }
+
+        // return moves;
+
+    }
+
+    public static int[] salamanderLocation(char[][] enclosure) {
+        for (int r = 0; r < enclosure.length; r++) {
+            for (int c = 0; c < enclosure[r].length; c++) {
+                if (enclosure[r][c] == 's') {
+                    return new int[]{r, c};
+                }
+            }
+        }
+        throw new IllegalArgumentException("No salamander present");
+    }
 }