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){
     
    char s[4];
    int result=0;
     
    scanf("%s",s);
     
    if(s[0]=='R'){
      if(s[1]=='R'){
        if(s[2]=='R'){
          result=3;
        }else{
          result=2;
        }
      }else if(s[1]=='S'){
        result=1;
      }
    }
     
    if(s[0]=='S'){
      if(s[1]=='S'){
        if(s[2]=='S'){
          result=0;
        }else if(s[2]=='R'){
          result=1;
        }    
      }else if(s[1]=='R'){
        if(s[2]=='R'){
            result=2;
        }else{
          result=1;
        }
    }
  }
    
     
    printf("%d",result);

}