Programación Competitiva

#include <bits/stdc++.h>
using namespace std;

int main() {
    string s;
    while (getline(cin, s)) {
        stringstream ss(s);
        int p;
        char o;
        bool ob = false;
        if (s.length() == 3) {
            o = s[s.length()-1];
            ob = true;
        }
        ss >> p;
        p = (18 + p) % 36;
        if (p == 0) p = 36;

        printf("%02d", p);
        if (ob) {
            if (o == 'L') o = 'R';
            else if (o == 'C') o = 'C';
            else o = 'L';
            cout << o;
        }

        cout << endl;
    }

    return 0;
}