#include <bits/stdc++.h>
#include "books.h"
using namespace std;
void solve(int n, int k, long long A, int S) {
if (S == n) {
long long a[n + 1];
for (int i = 1; i <= n; i++)
a[i] = skim(i);
long long pref[n + 1];
pref[0] = 0;
for (int i = 1; i <= n; i++)
pref[i] = a[i] + pref[i - 1];
function<long long(int, int)> sum = [&](int l, int r) {
return pref[r] - pref[l - 1];
};
for (int i = 1; i <= n; i++) {
if (sum(i, i + k - 1) >= A && sum(i, i + k - 1) <= 2 * A) {
vector<int> ans;
for (int j = i; j < i + k; j++)
ans.emplace_back(j);
answer(ans);
return;
}
};
long long s[n + 1];
for (int i = 1; i + k - 2 <= n; i++)
s[i] = sum(i, i + k - 2);
for (int i = k; i <= n; i++) {
int l = 1, r = i - k + 1;
while (r - l > 1) {
int m = (l + r) >> 1;
if (s[m] + a[i] >= A)
r = m;
else
l = m;
}
int ind = -1;
if (s[l] + a[i] >= A)ind = l;
else if (s[r] + a[i] >= A)ind = r;
if (ind != -1 && s[ind] + a[i] <= 2 * A) {
vector<int> ans;
for (int j = ind; j < ind + k - 1; j++)
ans.emplace_back(j);
ans.emplace_back(i);
answer(ans);
return;
}
}
impossible();
return;
}
function<long long(int)> get = [&](int i) {
long long sum = 0;
for (int j = i; j < i + k; j++)
sum += skim(j);
return sum;
};
int l = 1, r = n - k + 1;
while (r - l > 1) {
int m = (l + r) / 2;
if (get(m) >= A)
r = m;
else
l = m;
}
int ind = -1;
long long s1 = get(l), s2 = get(r);
if (s1 >= A && s1 <= 2 * A) {
ind = l;
} else if (s2 >= A && s2 <= 2 * A) {
ind = r;
}
if (ind == -1) {
impossible();
return;
}
vector<int> ans;
for (int j = ind; j < ind + k; j++)
ans.emplace_back(j);
answer(ans);
}
