#include "books.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
#define pll pair<ll,ll>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl;
#define MP make_pair
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define SZ(x) (ll)x.size()
#define ALL(x) x.begin(),x.end()
#define endl "\n"
const ll inf=1e18;
const ll maxn=1e5+5;
ll diff[maxn];
ll d(ll x){
if(diff[x])return diff[x];
return diff[x]=skim(x);
}
void solve(int n, int k, long long A, int s) {
ll sum=0;
vector<int>ans;
rep(i,1,n+1){
sum+=d(i);
if(i<=k)ans.pb(i);
}
if(sum>2*A)impossible();
if(sum>=A)answer(ans);
// the sum of the first k elements is def lesser than A
//if >=A and <=2A we would have alr answered
//if >2A its def impossible
//if we find the largest index of element that is lesser than A
//we can switch any element to it and still be <=2A
ll lo=1,hi=n;
while(lo<hi){
ll mid=(lo+hi)>>1;
if(d(mid)<=A)lo=mid;
else hi=mid-1;
}
if(sum-d(k)+d(lo)>=A){
ans[k-1]=lo;
answer(ans);
}
int idx=1;
while(idx<=k and lo>0){
ans[idx-1]=lo;
sum-=d(idx);idx++;
sum+=d(lo);lo--;
}
if(sum>=A)answer(ans);
impossible();
}
