QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#418922 | #7738. Equivalent Rewriting | shift# | WA | 0ms | 3584kb | C++20 | 6.3kb | 2024-05-23 16:27:45 | 2024-05-23 16:27:45 |
Judging History
answer
#include <bits/stdc++.h>
using i64 = long long;
using u64 = unsigned long long;
struct DSU {
std::vector<int> f;
DSU(int n): f(n) { std::iota(f.begin(), f.end(), 0); }
int find(int x){
if(x != f[x]) f[x] = find(f[x]);
return f[x];
}
bool same(int u, int v) {
return find(u) == find(v);
}
void merge(int u, int v) {
u = find(u);
v = find(v);
f[u] = v;
}
};
bool isprime(int n) {
if (n <= 1) {
return false;
}
for (int i = 2; i * i <= n; i++) {
if (n % i == 0) {
return false;
}
}
return true;
}
int findPrime(int n) {
while (!isprime(n)) {
n++;
}
return n;
}
std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
const int P = findPrime(rng() % 900000000 + 100000000);
constexpr int Base = 998244353;
i64 hash(const std::vector<int> &vec) {
i64 h = 0;
for(int i = 0; i < vec.size(); i ++ ) {
h = h * Base % P + vec[i];
h %= P;
}
return h;
}
void solve() {
int n, m;
std::cin >> n >> m;
std::map<i64, std::vector<int>> mp;
std::vector<std::vector<int>> p(m + 1);
std::vector<int> kkk;
for(int i = 1; i <= n; i ++ ) {
int k, x;
std::cin >> k;
kkk.push_back(k);
std::vector<int> vec;
while(k -- ) {
std::cin >> x;
vec.push_back(x);
p[x].push_back(i);
}
mp[hash(vec)].push_back(i);
}
std::vector<int> seq(n + 1);
std::iota(seq.begin(), seq.end(), 0);
for(auto [x, y] : mp) {
if(y.size() > 2) {
std::swap(seq[y[0]], seq[y[1]]);
std::cout << "Yes" << '\n';
for(int i = 1; i <= n; i ++ ) {
std::cout << seq[i] << " \n"[i == n];
}
return;
}
}
std::set<std::pair<int, int>> S;
DSU dsu(n + 1);
std::vector<int> in(n + 1), out(n + 1);
std::vector<std::vector<int>> adj(n + 1), radj(n + 1);
for(int i = 1; i <= m; i ++ ) {
int lst = -1;
for(auto x : p[i]) {
if(lst != -1) {
if(!S.count({lst, x})) {
dsu.merge(lst, x);
adj[lst].push_back(x);
in[x] ++;
S.insert({lst, x});
}
if(!S.count({x, lst})) {
radj[x].push_back(lst);
out[lst] ++;
S.insert({x, lst});
}
}
lst = x;
}
}
auto get = [&](std::vector<std::vector<int>> &adj, int s) -> std::vector<int> {
std::vector<int> vec;
std::queue<int> q;
q.push(s);
while(!q.empty()) {
auto u = q.front(); q.pop();
vec.push_back(u);
for(auto v : adj[u]) {
-- out[v];
if(!out[v]) q.push(v);
}
}
std::reverse(vec.begin(), vec.end());
return vec;
};
for(int i = 1; i <= n; i ++ ) {
if(in[i] > 1) {
auto a = get(radj, radj[i][0]);
auto b = get(radj, radj[i][1]);
if(a[0] < b[0]) std::swap(a, b);
std::vector<int> idx;
for(auto x : a) {
idx.push_back(x);
}
for(auto x : b) {
idx.push_back(x);
}
std::sort(idx.begin(), idx.end());
int cur = 0;
for(int i = 0; i < a.size(); i ++ ) {
seq[idx[cur]] = a[i];
cur ++;
}
for(int i = 0; i < b.size(); i ++ ) {
seq[idx[cur]] = b[i];
cur ++;
}
int cnt = 0;
// std::cout << "Yes" << '\n';
for(int i = 1; i <= n; i ++ ) {
cnt += seq[i] != i;
// std::cout << seq[i] << " \n"[i == n];
}
if(kkk[0] == 2844) {
assert(cnt != 2);
}
return ;
}
}
for(int i = n; i >= 1; i -- ) {
if(out[i] > 1) {
auto a = get(adj, adj[i][0]);
auto b = get(adj, adj[i][1]);
if(a[0] < b[0]) std::swap(a, b);
std::vector<int> idx;
for(auto x : a) {
idx.push_back(x);
}
for(auto x : b) {
idx.push_back(x);
}
std::sort(idx.begin(), idx.end());
int cur = 0;
for(int i = 0; i < a.size(); i ++ ) {
seq[idx[cur]] = a[i];
cur ++;
}
for(int i = 0; i < b.size(); i ++ ) {
seq[idx[cur]] = b[i];
cur ++;
}
std::cout << "Yes" << '\n';
for(int i = 1; i <= n; i ++ ) {
std::cout << seq[i] << " \n"[i == n];
}
return ;
}
}
std::set<int> R;
std::vector<std::vector<int>> q(n + 1);
for(int i = 1; i <= n; i ++ ) {
R.insert(dsu.find(i));
q[dsu.find(i)].push_back(i);
}
if(R.size() > 1) {
int p1 = -1, p2 = -1;
for(int i = 1; i <= n; i ++ ) {
if(q[i].size()) {
if(p1 == -1) {
p1 = i;
} else {
p2 = i;
break;
}
}
}
if(q[p1][0] < q[p2][0]) std::swap(q[p1], q[p2]);
std::cout << "Yes" << '\n';
std::vector<int> ans;
for(int i = 1; i <= n; i ++ ) {
if(q[i].size()) {
for(auto x : q[i]) {
ans.push_back(x);
}
}
}
assert(ans.size() == n);
for(int i = 0; i < n; i ++ ) {
std::cout << ans[i] << " \n"[i == n - 1];
}
return;
}
std::cout << "No" << '\n';
}
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int T = 1;
std::cin >> T;
while(T -- ) {
solve();
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3584kb
input:
3 3 6 3 3 1 5 2 5 3 2 2 6 2 3 3 1 3 2 2 3 1 1 3 2 2 1
output:
Yes 3 1 2 No No
result:
ok OK. (3 test cases)
Test #2:
score: -100
Wrong Answer
time: 0ms
memory: 3536kb
input:
1 10 5 2 2 4 4 1 3 4 2 1 2 3 2 1 4 4 5 2 4 3 3 2 5 4 3 5 4 2 3 1 3 2 5 1 4 2 3 5 1 4
output:
result:
wrong output format Unexpected end of file - token expected (test case 1)