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;

namespace AtCoderProblems
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            string str = Console.ReadLine();
            int best = 0;
            int count = 0;

            for(int i = 0; i < str.Length; i++)
            {
                if(str[i] == 'R')
                {
                    count++;
                    if(best<count)
                    {
                        best = count;
                    }
                }
                else
                {
                    count = 0;
                }
            }
            Console.WriteLine(best);
        }
    }

}