Create robot_bounded_in_circle.cpp

Author: avidLearnerInProgress

robot_bounded_in_circle.cpp

@@ -0,0 +1,66 @@
+class Solution {
+    enum Directions{ NORTH, SOUTH, EAST, WEST };
+public:
+    bool isRobotBounded(string instructions) {
+        
+        if(instructions.size() == 0) return false;
+        int x = 0, y = 0;
+        
+        Directions d = NORTH;
+        
+        for(auto &instruction : instructions) {
+            if(instruction == 'G') {
+                
+                switch(d) {
+                    case NORTH:
+                        y++;
+                        break;
+                    case SOUTH:
+                        y--;
+                        break;
+                    case WEST:
+                        x--;
+                        break;
+                    case EAST:
+                        x++;
+                        break;
+                }
+            }
+            else if(instruction == 'L') {
+                switch(d) {
+                    case NORTH:
+                        d = WEST;
+                        break;
+                    case SOUTH:
+                        d = EAST;
+                        break;
+                    case EAST:
+                        d = NORTH;
+                        break;
+                    case WEST:
+                        d = SOUTH;
+                        break;
+                }
+            }
+            else {
+                switch(d) {
+                    case NORTH:
+                        d = EAST;
+                        break;
+                    case SOUTH:
+                        d = WEST;
+                        break;
+                    case EAST:
+                        d = SOUTH;
+                        break;
+                    case WEST:
+                        d = NORTH;
+                        break;
+                }
+            }
+        }
+        if((x == 0 and y == 0) or !(d == NORTH)) return true;
+        
+        return false;
+    }
+};