【題解】AtCoder ABC 175A – Rainy Season

#include <iostream>
using namespace std;

int cnt, ans;
string s;

int main() {
    cin >> s;
    for (int i = 0; i < s.length(); i++){
        if (s[i] == 'R'){
            cnt++;
            ans = max(ans, cnt);
        }
        else cnt = 0;
    }
    cout << ans << "\n";
}