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 (GCC 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
int main()
{
  char str[3];
  int i;

  scanf("%s",&str);

      if(str[0]=='R')
	{
	  if (str[1]=='S')
	    {
	      printf( "1\n");
	    }
	  else if (str[1]=='R' && str[2]=='S' )
	    {
	      printf( "2\n" );
	    }
	  else printf( "3\n" );
	}
      else
	{
	  if (str[1]=='R')
	    {
	      if (str[2]=='R')
		{
		  printf("2\n");
		}
	      else
		{
		  printf("1\n");
		}
	    }
	  else
	    {
	      if (str[2]=='S')
		{
		  printf("0\n");
		}
	      else
		{
		  printf("1\n");
		}

	    }
	}

  
  return 0;
}