Complete the function follow(s) which, for a given string (containing only the letters 'f', 'b', 'l', 'r'), calculates the final position according to the following rule:
  • The letter 'f' indicates to move forward by (0,1),
  • The letter 'b' indicates to move backward by (0,-1),
  • The letter 'l' indicates to move left by (-1,0),
  • The letter 'r' indicates to move right by (1,0).
Example: consider the initial position at point (0,0). If your list of instructions is 'fflff', then you should move forward twice, take a step to the left, then move forward again twice, and finally you will be at (-1, 4):
Other examples:
  • follow('ffrff') returns (1,4)
  • follow('fblr') returns (0,0)
Solve

Solution Stats

60 Solutions

30 Solvers

Last Solution submitted on Aug 11, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers30

Chris Cleveland George Berken goc3 Lorenzo

Suggested Problems

More from this Author53

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!