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.Scanner;
import java.time.Year;
import java.util.Random;
import java.math.*;

public class Main{
    public static void main(String[] args){
        Scanner sc =new Scanner(System.in);
        String a = sc.next();
        int R = 0;
        if(a.charAt(0)=='R'){
                R++;
        }
        if(a.charAt(1)=='R'){
                R=R+2;
        }
        if(a.charAt(2)=='R'){
            R = R+4;
        }
        
        if(R==1 || R==2|| R==4){
            System.out.println(1);
        }else if(R==3 || R == 6){
            System.out.println(2);
        }else if(R==7){
            System.out.println(3);
        }else{
            System.out.println(1);
        }
    }
}