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: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  cin >> s;
  int i;
  char c = s.at(i);
  
  if(s.at(0) == s.at(1) == s.at(2) == 'R'){
    cout << 3 << endl;
  }
  else if(s.at(0) == s.at(1) == 'R' || s.at(1) == s.at(2) == 'R'){
    cout << 2 << endl;
  }
  else if(s.at(0) == 'R' || s.at(1) == 'R' || s.at(2) == 'R'){
    cout << 1 << endl;
  }
  else{
    cout << 0 << endl;
  }
}