#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n;
    cin>>n;
    int l,r;
    cin>>l>>r;
    int niza[n];
    vector<pair<int,int> > v;
    for(int i=0; i<n ;i++)
    {
        cin>>niza[i];
        v.push_back({niza[i],i});
    }
    int sum=0;
    int i=0;
    for(int j=0; j<n; j++)
    {
        i=0;
        sum+=v[j].first;
        if(sum>=r)
        {
            while(sum>r)
            {
                sum-=v[i].first;
                i++;
            }
        }
        if(sum>=l)
        {
            if(i==j)
            {
                cout<<i+1<<endl;
                return 0;
            }
            cout<<i+1<<" "<<j+1<<endl;
            return 0;
        }
    }
    cout<<" "<<endl;
    return 0;
}