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;

#define vi vector<int>
#define all(v) v.begin(), v.end()
#define ll long long int
#define ff first
#define ss second
#define pb push_back
#define pp pop_back
#define forn(i,n) for(int i=0;i<n;i++)
#define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
using namespace std;
int main()
{
    IOS
    int i,j,k,n;
    string s;
    cin>>s;
    if(s[0]=='R'){
        if(s[1]=='R' && s[2]=='R'){
            cout<<3;
        }
        else if(s[1]=='R'){
            cout<<2;
        }
        else{
            cout<<1;
        }
    }
    else if(s[1]=='R'){
        if(s[2]=='R'){
            cout<<2;
        }
        else{
            cout<<1;
        }
    }
    else if(s[2]=='R'){
        cout<<1;
    }
    else{
        cout<<0;
    }
    cout<<endl;
}