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;

#define int long long
#define forn(i,a,n) for (int i=a; i<n; i++)

signed main(){
	ios::sync_with_stdio(false);
   	cin.tie(0);

	//freopen("input.txt","r",stdin);
	//freopen("output.txt","w",stdout);

	string s;
	cin>>s;
	int mx=0,cnt=0;
	forn(i,0,3){
		if (s[i]=='R'){
			cnt++;
		}
		else{
			mx=max(mx,cnt);
			cnt=0; 
		}
	}
	cout<<mx<<endl;
	return 0;
}