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: Accepted)

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

namespace contest_Csharp
{
    
    class Program
    {
        public static (long m,long s)[,] dp;

        static void Main(string[] args)
        {
            checked
            {
                var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
                Console.SetOut(sw);

                //var vals = Console.ReadLine().Split(' ').
                //    Select(x => int.Parse(x)).ToList();
                var S = Console.ReadLine();
                //var N = vals[0];
                //var K = vals[1];
                var ans = 0;
                var pre = 0;
                for (int i = 0; i < 3; i++)
                {
                    if (S[i] == 'R')
                    {
                        pre++;
                        ans = Math.Max(pre, ans);
                    }
                    else
                    {
                        pre = 0;
                    }
                }

                

                Console.WriteLine(ans);

                Console.Out.Flush();
            }




        }
    }
}