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: Accepted)

import java.util.Scanner;

public class Main{
	public static void main(String args[]){
      test_ans();
    }

    private static void test_mine(){
        Scanner scan = new Scanner(System.in);
        String s = scan.next();

        int count = 0;
        if(s.charAt(1) == 'S'){
            if(s.charAt(0) == 'R' || s.charAt(2) == 'R')
                count = 1;
            else
                count = 0;
        }else{
            if(s.charAt(0) == 'R'){
                if(s.charAt(2) == 'R'){
                    count = 3;
                }else{
                    count = 2;
                }
            }else if(s.charAt(2) == 'R'){
                if(s.charAt(0) == 'R'){
                    count = 3;
                }else{
                    count = 2;
                }
            }else
                count = 1;
            }
        System.out.println(count);
    }

    private static void test_ans(){
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        
        boolean p = s.charAt(0) == 'R';
        boolean q = s.charAt(1) == 'R';
        boolean r = s.charAt(2) == 'R';

        int count = 0;
        if(p && q && r)
            count = 3;
        else if((p && q) || (q && r))
            count = 2;
        else if(p || q || r)
            count = 1;
        else
            count = 0;

        System.out.println(count);
    }
}