172 lines
3.3 KiB
C++
172 lines
3.3 KiB
C++
/* Problem URL: https://codeforces.com/problemset/problem/2145/D */
|
|
|
|
#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, k;
|
|
cin >> n >> k;
|
|
|
|
vi perm(n);
|
|
rep(i, n) {
|
|
perm[i] = i + 1;
|
|
}
|
|
|
|
V<V<V<bool>>> dp(n + 1, V<V<bool>>(n + 1, V<bool>(n * (n + 1) / 2 + 1)));
|
|
dp[0][0][0] = true;
|
|
V<V<bool>> tmp(n + 1, V<bool>(n * (n + 1) / 2 + 1));
|
|
tmp[0][0] = true;
|
|
|
|
nrep(i, 1, n + 1) {
|
|
for (int j = i; j > 0; j--) {
|
|
int sz = i - j + 1;
|
|
int sum = sz * (sz + 1) / 2;
|
|
|
|
nrep(k, sum, n * (n + 1) / 2 + 1) {
|
|
if (tmp[j - 1][k - sum]) {
|
|
dp[j][i][k] = true;
|
|
tmp[i][k] = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int t = n * (n + 1) / 2 - k;
|
|
vi sizes;
|
|
int l = n;
|
|
int r = n;
|
|
while (l > 0) {
|
|
if (dp[l][r][t]) {
|
|
int sz = r - l + 1;
|
|
int sum = sz * (sz + 1) / 2;
|
|
t -= sum;
|
|
sizes.push_back(sz);
|
|
l--;
|
|
r = l;
|
|
continue;
|
|
}
|
|
|
|
l--;
|
|
}
|
|
|
|
if (t > 0) {
|
|
cout << "0\n";
|
|
return;
|
|
}
|
|
|
|
int cur = 0;
|
|
int c = n;
|
|
vi ans(n);
|
|
|
|
while (cur < n) {
|
|
int now = sizes.back();
|
|
sizes.pop_back();
|
|
|
|
for (int i = now - 1; i >= 0; i--) {
|
|
ans[cur + i] = c;
|
|
c--;
|
|
}
|
|
cur += now;
|
|
}
|
|
|
|
cout << ans;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
ios::sync_with_stdio(false);
|
|
cin.tie(nullptr);
|
|
|
|
pre();
|
|
|
|
int t;
|
|
(TEST && cin >> t) || (t = 1);
|
|
while (t--) {
|
|
solve();
|
|
}
|
|
}
|