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 <time.h>
#include <math.h>


int main(){
	int N=3;
	char s[N];
	// scanf("%s",s);
	if(scanf("%s",s)==1);
	int num=0;
	// printf("%c",s[0]);
	// printf("%c",s[1]);

	// printf("%c",s[2]);

	int a[N];
	for(int i=0;i<N;i++){
		if(s[i]=='R'){
			a[i]=1;
			num++;
		}else{
			a[i]=0;
		}
	}
	// for(int i=0;i<N;i++){
	// 	printf("%d\n",a[i]);
	// }
	// printf("num=%d\n",num );
	if(num==1||num==3){
		printf("%d\n",num);
	}else if(num==2){
		if(a[1]==1)printf("%d\n",num);
		else printf("1\n");
	}else{
		printf("0\n");
	}

}
	
// 1変数
	// int N;
	// if(scanf("%d",&N)==1);

// 2変数
	// int a[N];
	// for(int i=0;i<N;i++){
	// 	a[i]=0;
	// 	if(scanf("%d ",&a[i])==1);
	// }

//文字列
	// char s[101];
	// scanf("%s",s);

// N個の変数
	// int X[N],Y[N];
	// for(int i=0;i<N;i++){
	// 	(void)scanf("%d %d",&X[i],&Y[i]);	
	// }





// for文
	// for(int i=0;i<N;i++){

	// }

	// for(int j=0;j<N;j++){
		
	// }