Problem 60251. Instructions Following

• Created by minnolina

×

Like (1)

Difficulty:

(13)

Rate

• Solve Later   
• Add To GroupÂ

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

60.87% Correct | 39.13% Incorrect

• 23 Solutions
• 13 Solvers

Last Solution submitted on Feb 28, 2025

Last 200 Solutions

Solution Comments

ANNOUNCEMENT ×

Registration Now Open for MathWorks AUTOMOTIVE CONFERENCE 2025

Hello Community, We're excited to announce that registration is now open for the...

Problem Recent Solvers13

Suggested Problems

• Remove all the words that end with "ain"

  2441 Solvers

• Woodall number

  166 Solvers

• Angle between Two Vectors

  514 Solvers

• Lychrel Number Test (Inspired by Project Euler Problem 55)

  102 Solvers

• Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

  1901 Solvers

More from this Author53

• Normalizing a vector

  35 Solvers

• Extract Increasing Integers from Digit String

  10 Solvers

• Find the nearest value to the given one

  34 Solvers

• Largest Rectangle Area in a Histogram

  6 Solvers

• Similar triangles

  16 Solvers