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 ll long long
#define pi pair<int, int>
#define pb push_back
#define fr first
#define sc second
#define endl '\n'

const int mxn = 1e6 + 5;
const ll MOD =  1e9 + 7;
int arr[mxn];
int n, m, k, q;
string s, t;

void solve(){
    cin >> s;
    int cnt = 0;
    for (int i = 0; i < 3; i++) cnt += (s[i] == 'R');
    if (cnt != 2) {
        cout << cnt << endl;
    } else {
        if (s[0] == s[2]) {
            cout << 1 << endl;
        } else {
            cout << 2 << endl;
        }
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    int T = 1;
    //cin >> T;
    while(T--) solve();
    return 0;
}