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 <iostream>
#include <vector>
#include <set>
#include <algorithm>
#include <fstream>
#include <string>
#include <math.h>
#include <cstdlib>
#include <cstdint>
#include <istream>
#include <sstream>
#include <cctype>
#include <functional>
#include <iomanip>
#define rep(i,N) for(ll i=0;i<N;i++)
#define disp(a) cout << a << endl;
#define PI 3.1415926535897932384626433
//cout << fixed << setprecision(20) << ** << endl;
typedef long long ll;
using namespace std;
int main()
{
	string s;
	cin>>s;
	if(s=="RRR")cout<<"3"<<endl;
	else if(s=="SRR"||s=="RRS")cout<<"2"<<endl;
	else if(s=="SSS")cout<<"0"<<endl;
	else cout<<"1"<<endl;

}