GlitchBot

glitchbot.py

@@ -0,0 +1,56 @@
+NORTH = 0
+EAST = 1
+SOUTH = 2
+WEST = 3
+
+LEFT = 0
+RIGHT = 1
+FORWARD = 2
+
+
+def run_program(program: list) -> tuple:
+    x, y = 0, 0
+    facing = NORTH
+
+    for instruction in program:
+        if instruction == LEFT:
+            facing = (facing - 1) % 4
+
+        elif instruction == RIGHT:
+            facing = (facing + 1) % 4
+
+        elif instruction == FORWARD:
+            if facing == NORTH:
+                y += 1
+            elif facing == SOUTH:
+                y -= 1
+            elif facing == EAST:
+                x += 1
+            elif facing == WEST:
+                x -= 1
+
+    return x, y
+
+
+x, y = map(int, input().split())
+instruction_count = int(input())
+
+program = []
+for _ in range(instruction_count):
+    instruction = input()
+    if instruction == "Left":
+        program.append(LEFT)
+    elif instruction == "Right":
+        program.append(RIGHT)
+    elif instruction == "Forward":
+        program.append(FORWARD)
+
+for i in range(len(program)):
+    for _ in range(3):
+        program[i] = (program[i] + 1) % 3
+        result = run_program(program)
+        if result == (x, y):
+            print(
+                f"{i+1} {'Left' if program[i] == LEFT else 'Right' if program[i] == RIGHT else 'Forward'}"
+            )
+            exit()