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 (Clang 10.0.0) (judge verdict: Accepted)

#include<stdio.h>

#define N 3

int main(void){
  char ch[N];

  for( int i=0 ; i<N ;  i++ ){
    scanf("%c",&ch[i]);
  }
  if(ch[0]=='R' && ch[1]=='R' && ch[2]=='R'){
    printf("3\n");
  }else if((ch[0]=='R' && ch[1]=='R') || (ch[1]=='R' && ch[2]=='R')){
    printf("2\n");
  }else if(ch[0]=='R' || ch[1]=='R' || ch[2]=='R'){
    printf("1\n");
  }else{
    printf("0\n");
  }

  return 0;
}