Problem:
Score : 100 points

Problem Statement

We have weather records at AtCoder Town for some consecutive three days. A string of length 3, S, represents the records - if the i-th character is S, it means it was sunny on the i-th day; if that character is R, it means it was rainy on that day.

Find the maximum number of consecutive rainy days in this period.

Constraints

|S| = 3

Each character of S is S or R.

Input

Input is given from Standard Input in the following format:

S

Output

Print the maximum number of consecutive rainy days in the period.

Sample Input 1

RRS

Sample Output 1

2

We had rain on the 1-st and 2-nd days in the period. Here, the maximum number of consecutive rainy days is 2, so we should print 2.

Sample Input 2

SSS

Sample Output 2

0

It was sunny throughout the period. We had no rainy days, so we should print 0.

Sample Input 3

RSR

Sample Output 3

1

We had rain on the 1-st and 3-rd days - two "streaks" of one rainy day, so we should print 1.

Solution in PHP (7.4.4) (judge verdict: Accepted)

<?php
// Your code here!
    //$count = fgets(STDIN);
    $weather_array = str_split(fgets(STDIN));

    $day = 0;
    $max_day = 0;
    $continue = FALSE;
    foreach($weather_array as $weather){
        if($weather == 'R'){
            if($continue){
                $day++;
            }else{
                $day = 1;
                $continue = TRUE;
            }
        }else{
            $day = 0;
            $continue = FALSE;
        }
        if($day > $max_day){
            $max_day = $day;
        }
    }
    
    echo $max_day;
    
?>