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Author: JanaSabuj

robot-bounded-in-circle/robot-bounded-in-circle.cpp

@@ -0,0 +1,31 @@
+class Solution {
+public:
+    // N E S W
+    // 0 1 2 3
+    vector<vector<int>> dirs = {
+        {0, 1},
+        {1, 0},
+        {0, -1},
+        {-1, 0}
+    };
+    
+    bool isRobotBounded(string instr) {
+        int x = 0, y = 0, d = 0;
+        for(auto ch: instr){
+            switch(ch) {
+                case 'G':
+                    x += dirs[d][0];
+                    y += dirs[d][1];
+                    break;
+                case 'R':
+                    d = (d + 1) % 4;
+                    break;
+                case 'L':
+                    d = (d - 1 + 4) % 4;
+                    break;
+            }
+        }
+        
+        return (x == 0 and y == 0) || d;
+    }
+};