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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function Main(input) {
  input = input.replace(/\n/g, ' ').split(" ");
  var a = input[0].slice(0,1);
  var b = input[0].slice(1,2);
  var c = input[0].slice(2,3);
  if(a==b && b==c && a=="R"){
    console.log(3);
  }else if(a==b && a=="R"){
    console.log(2);
  }else if(b==c && b=="R"){
    console.log(2);
  }else if(a=="R" || b=="R" || c=="R"){
    console.log(1);
  }else{
    console.log(0);
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));