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 <bits/stdc++.h>
#define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
using namespace std;
using ll = long long;
using d = double;

int main(){
  string s;
  cin >> s;
  if(s=="RSS") return cout << 1 <<endl,0;
  if(s=="SRS") return cout << 1 <<endl,0;
  if(s=="SSR") return cout << 1 <<endl,0;
  if(s=="RSR") return cout << 1 <<endl,0;
  if(s=="RRS") return cout << 2 <<endl,0;
  if(s=="SRR") return cout << 2 <<endl,0;
  if(s=="RRR") return cout << 3 <<endl,0;
  if(s=="SSS") return cout << 0 <<endl,0;
}