#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#include"books.h"
using namespace std;
//using namespace __gnu_pbds;
//#define ll long long
//#define endl "\n"
//int mod=1e9+7;
//const int N=2e5+5;
//template<class x>
//using ordered_multiset = tree<x, null_type,less_equal<x>, rb_tree_tag,tree_order_statistics_node_update>;
void solve(int N, int K, long long A, int S) {
vector<int> v(N);
for (int i=0;i<N;i++) {
v[i]=skim(i+1);
}
long long na=A*2;
int a=-1,b=-1,c=-1;
for (int l=0;l<N;l++) {
for (int r=l+2;r<N;r++) {
long long need=na-(v[l]+v[r]);
int ll=l+1,rr=r-1;
int mid=upper_bound(v.begin()+ll,v.begin()+rr,need)-v.begin();
mid--;
//cout<<a<<' '<<r<<' '<<mid<<endl;
if (mid>rr || mid<ll) continue;
long long chk=v[mid]+v[l]+v[r];
if (chk>=A && chk<=na) {
a=l+1; b=mid+1; c=r+1; break;
}
}
}
if (a==-1) impossible();
vector<int> ans;
ans.push_back(a); ans.push_back(b); ans.push_back(c);
//cout<<a<<' '<<b<<' '<<c;
answer(ans);
return;
}
