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;

class Program
    {
        static void Main(string[] args)
        {
            // int[] num = Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
            //
            // int H = num[0];
            // int W = num[1];
            // int M = num[2];
            //
            //
            //
            // int[,] list = new int[W,H];
            // List<int> num = new List<int>();
            // int[] set = new int[] { };
            // for (int i = 0; i < 3; i++)
            // {
            //     set = Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
            //     num.Add(set[0]);
            //     num.Add(set[1]);
            // }

            string input = Console.ReadLine();
            List<string> list = new List<string>();
            list.Add(input.Substring(0,1));
            list.Add(input.Substring(1,1));
            list.Add(input.Substring(2,1));
            int count = 0;
            
            for (int i = 0; i < list.Count; i++)
            {
                if (list[i].Equals("R"))
                {
                    count++;
                }
            }
            
            if (count == 3)
            {
                Console.Write(3);
            }else if (count == 2 && (list[0].Equals("S") || list[2].Equals("S")))
            {
                Console.Write(2);
            }else if (count == 2 && list[1].Equals("S"))
            {
                Console.Write(1);
            }
            else
            {
                Console.Write(0);
            }
        }
    }