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(void)
{
  int ans;
  char str[3];

  scanf("%s", str);
  
  char p = str[0];
  char q = str[1];
  char r = str[2];

  if(p == 'R' && q == 'R' && r == 'R') ans = 3;
  if(p == 'R' && q == 'R' && r == 'S') ans = 2;
  if(p == 'R' && q == 'S' && r == 'R') ans = 1;
  if(p == 'R' && q == 'S' && r == 'S') ans = 1;
  if(p == 'S' && q == 'R' && r == 'R') ans = 2;
  if(p == 'S' && q == 'R' && r == 'S') ans = 1;
  if(p == 'S' && q == 'S' && r == 'R') ans = 1;
  if(p == 'S' && q == 'S' && r == 'S') ans = 0;

  printf("%d\n", ans);
  return 0;
 

}