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{
  static public void main(String args[]){
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    if(S.length()!=3)System.exit(0);
    if(S.equals("RRR")){
      System.out.println("3");
      System.exit(0);
    }
    if(S.equals("RRS") || S.equals("SRR")){
      System.out.println("2");
      System.exit(0);
    } if (S.equals("SSS")){
        System.out.println("0");
      System.exit(0);
    } else {
      System.out.println("1");
    }
 }
}