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 AtCoderBeginnerContest175
{
	class Program
	{
		static void Main(string[] args)
		{
			var input = Console.ReadLine();

			var count = 0;
			var max = 0;
			for (var i = 0; i < 3; i++)
			{
				if (input[i] == 'R')
				{
					count++;
					if(count > max)
					{
						max = count;
					}
				}
				else
				{
					count = 0;
				}
			}

			Console.WriteLine(max);
		}
	}
}