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{
	static public void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str=sc.next();
		
		char ch1=str.charAt(0),ch2=str.charAt(1),ch3=str.charAt(2);
		if(ch1==ch2&&ch1=='R')System.out.println(2);
		else if(ch2==ch3&&ch2=='R')System.out.println(2);
		else if(ch1==ch2&&ch2==ch3&&ch1=='R')System.out.println(3);
		else if(ch1!=ch2&&ch2!=ch3)System.out.println(1);
		else System.out.println(0);
		sc.close();
		return;
	}
}