public/subjects/robottoorigin

robottoorigin

Instructions

There is a robot at position (0, 0) at 2D map.

Write a program, that outputs true if robot ends up at the origin (0, 0) after a sequence of moves, otherwise false. \n should be in the end of line.

Sequence of moves is a string, which characters state for movement direction:

• U - up
• D - down
• R - right
• L - left

If the number of arguments is not 1, output nothing.

Usage

student@ubuntu:~/robottoorigin/test$ go build
student@ubuntu:~/robottoorigin/test$ ./main "UD"
true
student@ubuntu:~/robottoorigin/test$ ./main "LL"
false

In first case, the robot moves up and the down. So, it returned back to its origin position.

In second example, the robot moves twice to the left. It is 2 positions left from its origin, so the program outputs false.