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>

using namespace std;

typedef long long int ll;
typedef long double ld;
typedef unsigned long long int ull;
typedef pair<ll,ll> pll;
typedef pair<int, int> pii;

#define N 100010
#define M 200010
#define endl "\n"
#define mod 1000000007 

int main(){
	
	ios_base::sync_with_stdio(0);
	cin.tie(0);cout.tie(NULL);
	
	string s;
	int ans = 0;
	
	cin >> s;
	for(int i = 0; i < 3; i++){
		if(s[i] == 'R'){
			ans = 1;
			i++;
			while(i < 3 && s[i] == 'R') ans++, i++;
		} 
	}
	
	cout << ans << endl;
	
	return 0;
}