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# (.NET Core 3.1.201) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoder.Abc
{
    //AtCoder Beginner Contest 175
    public class QuestionA
    {
        public static void Main(string[] args)
        {
            var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            Console.SetOut(sw);

            var s = Console.ReadLine();
            //int i1 = int.Parse(str[0]);
            //int i2 = int.Parse(str[1]);
            //int i3 = int.Parse(str[1]);
            var count = 0;

            if (s == "RRR")
            {
                count = 3;
                Console.WriteLine(count);
            }
            else if (s == "RRS" || s == "RSR" || s == "SRR")
            {
                count = 2;
                Console.WriteLine(count);
            }
            else if (s == "RSS" || s == "SSR" || s == "SRS")
            {
                count = 1;
                Console.WriteLine(count);
            }
            else
            {
                count = 0;
                Console.WriteLine(count);

            }


            Console.Out.Flush();
        }
    }
}