Trazas_de_cobre_Alen

///Trello, Facil, Trazas de cobre
#include <iostream> /// AlenAntonelli
#include <stack>
using namespace std;
int conecta(char cadena[ ], int pares[ ] )
{
    int nc=0;

    stack <int> C;
    stack <int> L;
    for (int i=0; cadena[i]=='L' || cadena[i]=='C'; i++)
    {
        if (cadena[i]=='L')
            L.push(i+1);
        if (cadena[i]=='C')
            C.push(i+1);
        if(L.size()>0 && C.size()>0)
        {
            nc++;
            pares[(nc-1)*2]=C.top();
            pares[(nc-1)*2+1]=L.top();
            C.pop();
            L.pop();
        }
    }
    return nc;
}

int main ()
{
    string aux;
    cin>>aux;
    char cadena[aux.size()];
    for (int i=0; i<aux.size(); i++)
        cadena[i]=aux[i];
    int pares[2000];
    int nc = conecta(cadena, pares);
    cout<<nc<<endl;
    for (int i=0; i<nc*2; i+=2)
    {
        cout<<pares[i]<<" ";
        cout<<pares[i+1]<<endl;
    }
    return 0;
}