149 lines
2.8 KiB
C++
149 lines
2.8 KiB
C++
/* Problem URL: https://codeforces.com/contest/2040/problem/C */
|
|
|
|
#include <bits/stdc++.h>
|
|
#include <ext/pb_ds/assoc_container.hpp>
|
|
#include <ext/pb_ds/tree_policy.hpp>
|
|
|
|
using namespace std;
|
|
using namespace __gnu_pbds;
|
|
|
|
template <class T, class comp = less<>>
|
|
using ordered_set = tree<T, null_type , comp , rb_tree_tag , tree_order_statistics_node_update>;
|
|
|
|
#define V vector
|
|
|
|
#define rmin(a, b) a = min(a, b)
|
|
#define rmax(a, b) a = max(a, b)
|
|
|
|
#define rep(i, lim) for (int i = 0; i < (lim); i++)
|
|
#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
|
|
|
|
#define repv(i, v) for (auto &i : (v))
|
|
#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
|
|
#define sortv(v) sort(v.begin(), v.end())
|
|
#define all(v) (v).begin(), (v).end()
|
|
|
|
using vi = vector<int>;
|
|
using vvi = vector<vi>;
|
|
using vvvi = vector<vvi>;
|
|
using vvvvi = vector<vvvi>;
|
|
|
|
using ll = long long;
|
|
|
|
using vl = vector<ll>;
|
|
using vvl = vector<vl>;
|
|
using vvvl = vector<vvl>;
|
|
using vvvvl = vector<vvvl>;
|
|
|
|
template<class v>
|
|
auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
|
|
os << vec[0];
|
|
for (size_t i = 1; i < vec.size(); i++) {
|
|
os << ' ' << vec[i];
|
|
}
|
|
os << '\n';
|
|
return os;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator>>(istream &is, vector<v> &vec)->istream& {
|
|
for (auto &i : vec) {
|
|
is >> i;
|
|
}
|
|
return is;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
|
|
for (auto &i : vec) {
|
|
os << i[0];
|
|
for (size_t j = 1; j < i.size(); j++) {
|
|
os << ' ' << i[j];
|
|
}
|
|
os << '\n';
|
|
}
|
|
return os;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator>>(istream &is, vector<vector<v>> &vec)->istream& {
|
|
for (auto &i : vec) {
|
|
for (auto &j : i) {
|
|
is >> j;
|
|
}
|
|
}
|
|
return is;
|
|
}
|
|
|
|
const int oo = INT32_MAX >> 1;
|
|
const ll OO = INT64_MAX >> 1;
|
|
|
|
|
|
void pre()
|
|
{
|
|
|
|
}
|
|
|
|
#define TEST 1
|
|
|
|
void solve()
|
|
{
|
|
int n;
|
|
ll k;
|
|
cin >> n >> k;
|
|
|
|
// if (k == 1) {
|
|
// rep(i, n) {
|
|
// cout << i + 1 << " \n"[i == n - 1];
|
|
// }
|
|
// return;
|
|
// }
|
|
|
|
if (n < 61 && (1LL << (n - 1)) < k) {
|
|
cout << "-1\n";
|
|
return;
|
|
}
|
|
|
|
vi ans(n);
|
|
ordered_set<int> ord;
|
|
rep(i, n) {
|
|
ord.insert(i + 1);
|
|
}
|
|
|
|
for (int i = n - 1; i >= 0; i--) {
|
|
int now = i;
|
|
ll cur = 1;
|
|
bool at = false;
|
|
while (cur < k) {
|
|
now--;
|
|
k -= cur;
|
|
if (at) {
|
|
cur <<= 1;
|
|
continue;
|
|
}
|
|
|
|
at = true;
|
|
}
|
|
|
|
auto itr = ord.find_by_order(now);
|
|
ans[i] = *itr;
|
|
ord.erase(itr);
|
|
}
|
|
|
|
cout << ans;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
ios::sync_with_stdio(false);
|
|
cin.tie(nullptr);
|
|
|
|
pre();
|
|
|
|
int t;
|
|
(TEST && cin >> t) || (t = 1);
|
|
while (t--) {
|
|
solve();
|
|
}
|
|
}
|