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.Linq;
using System.Numerics;
using System.Collections.Generic;

namespace ForAtcoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string a = Console.ReadLine();
            string[] strArray = new string[a.Length];
            for (var i = 0; i < a.Length; i++)
            {
                strArray[i] = a.Substring(i, 1);
            }
            if (strArray[0] == "R" && strArray[1] == "R" && strArray[2] == "R") Console.WriteLine("3");
            else if (strArray[0] == "R" && strArray[1] == "R" || strArray[1] == "R" && strArray[2] == "R") Console.WriteLine("2");
            else if (strArray[0] == "R" || strArray[1] == "R" || strArray[2] == "R") Console.WriteLine("1");
            else Console.WriteLine("0");
        }
    }
}