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<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
typedef long long ll;

int main()
{
    int ans;
    char s;

    scanf("%c",&s);
    if(s=='R')
    {
        scanf("%c",&s);
        if(s=='R')
        {
            scanf("%c",&s);
            if(s=='R')
            {
                ans=3;
            }
            else
            {
                ans=2;
            }
        }
        else
        {
            ans=1;
        }
        
    }
    else
    {
        scanf("%c",&s);
        if(s=='R')
        {
            scanf("%c",&s);
            if(s=='R')
            {
                ans=2;
            }
            else
            {
                ans=1;
            }
        }
        else
        {
            scanf("%c",&s);
            if(s=='R')
            {
                ans=1;
            }
            else
            {
                ans=0;
            }
            
        }
        
    }

    printf("%d\n",ans);

    return 0;
}