130 lines
2.2 KiB
C++
130 lines
2.2 KiB
C++
#include <bits/stdc++.h> // {{{
|
|
|
|
// https://codeforces.com/blog/entry/96344
|
|
|
|
#pragma GCC optimize("O2,unroll-loops")
|
|
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
|
|
|
|
using namespace std;
|
|
|
|
template <typename T>
|
|
constexpr T MIN = std::numeric_limits<T>::min();
|
|
|
|
template <typename T>
|
|
constexpr T MAX = std::numeric_limits<T>::max();
|
|
|
|
template <typename T>
|
|
[[nodiscard]] static T sc(auto&& x) {
|
|
return static_cast<T>(x);
|
|
}
|
|
|
|
template <typename T>
|
|
[[nodiscard]] static T sz(auto&& x) {
|
|
return static_cast<T>(x.size());
|
|
}
|
|
|
|
template <typename... Args>
|
|
void pr(std::format_string<Args...> fmt, Args&&... args) {
|
|
std::print(fmt, std::forward<Args>(args)...);
|
|
}
|
|
|
|
template <typename... Args>
|
|
void pr(std::format_string<Args...> fmt) {
|
|
std::print(fmt);
|
|
}
|
|
|
|
template <typename... Args>
|
|
void prln(std::format_string<Args...> fmt, Args&&... args) {
|
|
std::println(fmt, std::forward<Args>(args)...);
|
|
}
|
|
|
|
template <typename... Args>
|
|
void prln(std::format_string<Args...> fmt) {
|
|
std::println(fmt);
|
|
}
|
|
|
|
void prln() {
|
|
std::println();
|
|
}
|
|
|
|
void prln(auto const& t) {
|
|
std::println("{}", t);
|
|
}
|
|
|
|
#ifdef LOCAL
|
|
#define dbgln(...) prln(...)
|
|
#define dbg(...) pr(...)
|
|
#endif
|
|
|
|
using ll = long long;
|
|
using ld = long double;
|
|
template <typename T>
|
|
using vec = std::vector<T>;
|
|
template <typename T, size_t N>
|
|
using arr = std::array<T, N>;
|
|
|
|
#define ff first
|
|
#define ss second
|
|
#define eb emplace_back
|
|
#define pb push_back
|
|
#define all(x) (x).begin(), (x).end()
|
|
#define rall(x) (x).rbegin(), (x).rend()
|
|
// }}}
|
|
|
|
void solve() {
|
|
ll n, x;
|
|
cin >> n >> x;
|
|
|
|
ll cur = 0;
|
|
|
|
bool broken = false;
|
|
if (n > 1) {
|
|
cout << 0 << ' ';
|
|
} else {
|
|
cout << x << endl;
|
|
return;
|
|
}
|
|
int a = 0;
|
|
for (int i = 0; i < n - 2; ++i) {
|
|
++cur;
|
|
|
|
if (broken || (cur | x) > x) {
|
|
broken = true;
|
|
}
|
|
|
|
if (broken) {
|
|
cout << x;
|
|
a |= x;
|
|
} else {
|
|
cout << cur;
|
|
a |= cur;
|
|
}
|
|
cout << ' ';
|
|
}
|
|
|
|
++cur;
|
|
|
|
if (broken) {
|
|
cout << x;
|
|
} else {
|
|
if ((cur | x) <= x && (a | cur) == x) {
|
|
cout << cur;
|
|
} else
|
|
cout << x;
|
|
}
|
|
cout << endl;
|
|
}
|
|
|
|
int main() { // {{{
|
|
cin.tie(nullptr)->sync_with_stdio(false);
|
|
|
|
int t = 1;
|
|
cin >> t;
|
|
|
|
while (t--) {
|
|
solve();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
// }}}
|