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 Go (1.14.1) (judge verdict: Accepted)

package main

import (
    "bufio"
    "fmt"
    "os"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
    var s string
    ans, tmp := 0, 0
    if sc.Scan() {
        s = sc.Text()
    }
  	for i:=0; i<3; i++ {
    	if s[i] == 'R' {
        	tmp++;
        } else {
        	if ans < tmp {
            	ans = tmp
            }
          	tmp = 0
        }
    }
  	if ans < tmp {
  		ans = tmp
    }
  	fmt.Println(ans)
}