Math Decision Making Simulation
Learner Level

Implement the detectCircularRouteSimple method that checks whether the given movement sequence returns to the starting point.

The input contains a string moves. Each character represents one movement from the current position: U for up, D for down, L for left, and R for right.

Your task is to check whether following all moves brings the route back to the starting point.

For example, UDLR returns to the starting position because up is cancelled by down, and left is cancelled by right.

Example 1
Input:
moves (string) = UDLR
Return:
(boolean) true
Example 2
Input:
moves (string) = UD
Return:
(boolean) true
Example 3
Input:
moves (string) = UUD
Return:
(boolean) false

Track the current position using two coordinates.

Start from (0, 0). Increase or decrease the vertical coordinate for U and D, and increase or decrease the horizontal coordinate for R and L.

After all moves are processed, the route is circular only if both coordinates are again 0.

Pseudocode:

function detectCircularRouteSimple(moves):
    x = 0
    y = 0
    for each move in moves:
        if move == U:
            y++
        else if move == D:
            y--
        else if move == R:
            x++
        else if move == L:
            x--
    return x == 0 and y == 0
Run your code to see the result.