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 Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.util.*;

public class Main {

    public static void main(String args[]) {


        Scanner scan = new Scanner(System.in);
        String s = scan.next();

        char a = s.charAt(0);
        char b = s.charAt(1);
        char c = s.charAt(2);

        if (a == 'R') {
            if (b== 'R') {

                if (c == 'R') {
                    System.out.println(3);
                } else {
                    System.out.println(2);
                }
            }  else {
                System.out.println(2);
            }
        } else {
            if (b== 'R') {
                if (c== 'R') {
                    System.out.println(2);
                } else {
                    System.out.println(1);
                }
            } else {
                if (c=='R') {
                    System.out.println(1);
                } else {
                    System.out.println(0);
                }
            }
        }

    }
}