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 C# (Mono-csc 3.5.0) (judge verdict: Accepted)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
public class Hello{
    public static void Main(){
        // Your code here!
        //var n = int.Parse(Console.ReadLine());
        var str = Console.ReadLine();
        //var t = Console.ReadLine();
        int ans = 0;
        for(int i = 0; i < str.Length; i++){
            if(str[i] == 'R'){
                ans++;
            }
        }
        if(ans == 0){
            ans = 0;
        }else if(str[1] != 'R'){
            ans = 1;
        }
        Console.WriteLine(ans);
    }
}