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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#304260 | #8004. Bit Component | ucup-team133# | WA | 1ms | 3560kb | C++23 | 4.3kb | 2024-01-13 17:05:29 | 2024-01-13 17:05:29 |
Judging History
answer
#include <bits/stdc++.h>
#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...) void(0)
#endif
using namespace std;
typedef long long ll;
#define all(x) begin(x), end(x)
constexpr int INF = (1 << 30) - 1;
constexpr long long IINF = (1LL << 60) - 1;
constexpr int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
template <class T> istream& operator>>(istream& is, vector<T>& v) {
for (auto& x : v) is >> x;
return is;
}
template <class T> ostream& operator<<(ostream& os, const vector<T>& v) {
auto sep = "";
for (const auto& x : v) os << exchange(sep, " ") << x;
return os;
}
template <class T, class U = T> bool chmin(T& x, U&& y) { return y < x and (x = forward<U>(y), true); }
template <class T, class U = T> bool chmax(T& x, U&& y) { return x < y and (x = forward<U>(y), true); }
template <class T> void mkuni(vector<T>& v) {
sort(begin(v), end(v));
v.erase(unique(begin(v), end(v)), end(v));
}
template <class T> int lwb(const vector<T>& v, const T& x) { return lower_bound(begin(v), end(v), x) - begin(v); }
int topbit(signed t) { return t == 0 ? -1 : 31 - __builtin_clz(t); }
int topbit(long long t) { return t == 0 ? -1 : 63 - __builtin_clzll(t); }
int botbit(signed a) { return a == 0 ? 32 : __builtin_ctz(a); }
int botbit(long long a) { return a == 0 ? 64 : __builtin_ctzll(a); }
int popcount(signed t) { return __builtin_popcount(t); }
int popcount(long long t) { return __builtin_popcountll(t); }
bool ispow2(int i) { return i && (i & -i) == i; }
long long MSK(int n) { return (1LL << n) - 1; }
vector<string> perm_to_field(int n, const vector<int>& p) {
int w = topbit(n) + 1;
vector<string> v;
for (int i = 0; i < n; i++) {
string s = "";
for (int j = 0; j < w; j++) s += char('0' + (p[i] >> j & 1));
ranges::reverse(s);
v.emplace_back(s);
}
return v;
}
int component(int n, const vector<int>& p) {
int w = topbit(n) + 1;
auto v = perm_to_field(n, p);
vector seen(n, vector<bool>(w, false));
int res = 0;
auto dfs = [&](auto self, int x, int y) -> void {
seen[x][y] = true;
for (int i = 0; i < 4; i++) {
int nx = x + dx[i], ny = y + dy[i];
if (clamp(nx, 0, n - 1) != nx or clamp(ny, 0, w - 1) != ny) continue;
if (v[nx][ny] != '1') continue;
if (seen[nx][ny]) continue;
self(self, nx, ny);
}
};
for (int i = 0; i < n; i++) {
for (int j = 0; j < w; j++) {
if (v[i][j] != '1') continue;
if (seen[i][j]) continue;
dfs(dfs, i, j);
res++;
}
}
return res;
}
vector<int> gray_code(int n) {
vector<int> res;
for (int i = 0; i < n; i++) res.emplace_back(i ^ (i >> 1));
return res;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
int top = topbit(n);
if (n == 1) {
cout << "YES\n";
cout << "1\n";
return 0;
}
if (n == 2) {
cout << "NO\n";
return 0;
}
if (n == 3) {
cout << "YES\n";
cout << "2 3 1\n";
return 0;
}
if (n < (1 << top) + (1 << (top - 1)) + 1) {
cout << "NO\n";
return 0;
}
if (n == (1 << (top + 1)) - 1) {
cout << "YES\n";
auto ord = gray_code(1 << (top + 1));
for (int i = 1; i <= n; i++) cout << ord[i] << (i == n ? "\n" : " ");
return 0;
}
vector<int> ans;
auto org = gray_code(1 << top);
debug(org);
for (int i = 1; i < int(org.size()); i++) {
ans.emplace_back(org[i]);
if ((org[i] >> (top - 1) & 1) and org[i] + (1 << top) <= n) ans.emplace_back(org[i] + (1 << top));
if (org[i] == (1 << (top - 1)) + (1 << (top - 2))) {
assert(org[i + 1] == org[i] + 1);
ans.emplace_back((1 << top) + (1 << (top - 1)));
auto org2 = gray_code(1 << (top - 1));
ans.emplace_back(1 << top);
ranges::reverse(org2);
org2.pop_back();
for (int& val : org2) ans.emplace_back(val + (1 << top));
ans.emplace_back((1 << top) + (1 << (top - 1)) + 1);
}
}
cout << "YES\n";
for (int i = 0; i < n; i++) cout << ans[i] << (i + 1 == n ? "\n" : " ");
#ifdef LOCAL
assert(component(n, ans) == 1);
#endif
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3516kb
input:
1
output:
YES 1
result:
ok answer is 1
Test #2:
score: 0
Accepted
time: 0ms
memory: 3516kb
input:
2
output:
NO
result:
ok answer is 0
Test #3:
score: 0
Accepted
time: 1ms
memory: 3560kb
input:
3
output:
YES 2 3 1
result:
ok answer is 1
Test #4:
score: 0
Accepted
time: 0ms
memory: 3444kb
input:
4
output:
NO
result:
ok answer is 0
Test #5:
score: 0
Accepted
time: 1ms
memory: 3444kb
input:
5
output:
NO
result:
ok answer is 0
Test #6:
score: 0
Accepted
time: 0ms
memory: 3452kb
input:
6
output:
NO
result:
ok answer is 0
Test #7:
score: 0
Accepted
time: 0ms
memory: 3444kb
input:
7
output:
YES 1 3 2 6 7 5 4
result:
ok answer is 1
Test #8:
score: 0
Accepted
time: 0ms
memory: 3492kb
input:
8
output:
NO
result:
ok answer is 0
Test #9:
score: 0
Accepted
time: 0ms
memory: 3488kb
input:
9
output:
NO
result:
ok answer is 0
Test #10:
score: 0
Accepted
time: 0ms
memory: 3440kb
input:
10
output:
NO
result:
ok answer is 0
Test #11:
score: 0
Accepted
time: 0ms
memory: 3444kb
input:
11
output:
NO
result:
ok answer is 0
Test #12:
score: 0
Accepted
time: 0ms
memory: 3444kb
input:
12
output:
NO
result:
ok answer is 0
Test #13:
score: -100
Wrong Answer
time: 0ms
memory: 3484kb
input:
13
output:
YES 1 3 2 6 12 8 10 11 9 13 7 5 13
result:
wrong answer Every number must appear exactly once, but 4 appears 0 times