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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 |
---|---|---|---|---|---|---|---|---|---|
#330670 | #8055. Balance | ucup-team1134# | RE | 2ms | 5676kb | C++23 | 6.7kb | 2024-02-17 17:39:12 | 2024-02-17 17:39:12 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=1<<30;
vector<int> G[MAX],bel[MAX];
// https://ei1333.github.io/library/test/verify/yosupo-two-edge-connected-components.test.cpp
template< typename G >
struct LowLink {
const G &g;
vector< int > used, ord, low;
vector< int > articulation;
vector< pair< int, int > > bridge;
LowLink(const G &g) : g(g) {}
int dfs(int idx, int k, int par) {
used[idx] = true;
ord[idx] = k++;
low[idx] = ord[idx];
bool is_articulation = false;
int cnt = 0;
bool beet = false;
for(auto &to : g[idx]) {
if(to == par) {
if(!exchange(beet, true)) continue;
}
if(!used[to]) {
++cnt;
k = dfs(to, k, idx);
low[idx] = min(low[idx], low[to]);
is_articulation |= ~par && low[to] >= ord[idx];
if(ord[idx] < low[to]) bridge.emplace_back(minmax(idx, (int) to));
} else {
low[idx] = min(low[idx], ord[to]);
}
}
is_articulation |= par == -1 && cnt > 1;
if(is_articulation) articulation.push_back(idx);
return k;
}
virtual void build() {
used.assign(g.size(), 0);
ord.assign(g.size(), 0);
low.assign(g.size(), 0);
int k = 0;
for(int i = 0; i < g.size(); i++) {
if(!used[i]) k = dfs(i, k, -1);
}
}
};
template< typename T >
struct edge {
int src, to;
T cost;
edge(int to, T cost) : src(-1), to(to), cost(cost) {}
edge(int src, int to, T cost) : src(src), to(to), cost(cost) {}
edge &operator=(const int &x) {
to = x;
return *this;
}
operator int() const { return to; }
};
template< typename T >
using Edges = vector< edge< T > >;
template< typename T >
using WeightedGraph = vector< Edges< T > >;
using UnWeightedGraph = vector< vector< int > >;
template< typename T >
using Matrix = vector< vector< T > >;
template< typename GG >
struct TwoEdgeConnectedComponents : LowLink< GG > {
using LL = LowLink< GG >;
vector< int > comp;
TwoEdgeConnectedComponents(const GG &g) : LL(g) {}
int operator[](const int &k) {
return comp[k];
}
void dfs(int idx, int par, int &k) {
if(~par && this->ord[par] >= this->low[idx]) comp[idx] = comp[par];
else comp[idx] = k++;
for(auto &to : this->g[idx]) {
if(comp[to] == -1) dfs(to, idx, k);
}
}
void build(UnWeightedGraph &t) {
LL::build();
comp.assign(this->g.size(), -1);
int k = 0;
for(int i = 0; i < comp.size(); i++) {
if(comp[i] == -1) dfs(i, -1, k);
}
t.resize(k);
for(auto &e : this->bridge) {
int x = comp[e.first], y = comp[e.second];
G[x].push_back(y);
G[y].push_back(x);
}
}
};
vector<int> A,B;
int dp[MAX],siz[MAX];
void make(int u,int p){
dp[u]=-1;
siz[u]=si(bel[u]);
for(int to:G[u]){
if(to==p) continue;
make(to,u);
siz[u]+=siz[to];
chmax(dp[u],dp[to]);
}
if(dp[u]+1<si(A)&&A[dp[u]+1]==siz[u]) dp[u]++;
}
int ans=-1;
void solve(int u,int p){
vector<pair<int,int>> L,R;
for(int to:G[u]){
L.push_back(mp(dp[to],to));
}
R=L;
for(int i=1;i<si(L);i++) chmax(L[i],L[i-1]);
for(int i=si(R)-2;i>=0;i--) chmax(R[i],R[i+1]);
dp[u]=L.back().fi;
if(dp[u]+1<si(A)&&A[dp[u]+1]==siz[u]) dp[u]++;
if(dp[u]==si(A)-1) ans=u;
for(int i=0;i<si(G[u]);i++){
if(G[u][i]==p) continue;
int to=G[u][i];
int a=dp[u],b=dp[to];
int c=siz[u],d=siz[to];
siz[u]-=d;
siz[to]=c;
int ma=-1;
if(i) chmax(ma,L[i-1].fi);
if(i+1<si(R)) chmax(ma,R[i+1].fi);
dp[u]=ma;
if(dp[u]+1<si(A)&&A[dp[u]+1]==siz[u]) dp[u]++;
solve(to,u);
dp[u]=a;
dp[to]=b;
siz[u]=c;
siz[to]=d;
}
}
int sp[MAX],ANS[MAX];
void mogu(int u,int x){
for(int to:G[u]){
if(x&&dp[to]==x-1&&A[x-1]==siz[to]){
sp[to]=B[x-1];
mogu(to,x-1);
return;
}
}
for(int to:G[u]){
if(x&&dp[to]==x&&siz[to]<siz[u]){
mogu(to,x);
return;
}
}
}
void hiro(int u){
for(int x:bel[u]){
ANS[x]=sp[u];
}
for(int to:G[u]){
if(siz[to]<siz[u]){
if(sp[to]==-1) sp[to]=sp[u];
hiro(to);
}
}
}
int main(){
std::ifstream in("text.txt");
std::cin.rdbuf(in.rdbuf());
cin.tie(0);
ios::sync_with_stdio(false);
int Q;cin>>Q;
while(Q--){
int N, M;
cin >> N >> M;
UnWeightedGraph g(N);
for(int i = 0; i < M; i++) {
int a, b;
cin >> a >> b;a--;b--;
g[a].emplace_back(b);
g[b].emplace_back(a);
}
TwoEdgeConnectedComponents< UnWeightedGraph > uku(g);
UnWeightedGraph t;
uku.build(t);
int n=t.size();
for(int i=0;i<N;i++){
bel[uku[i]].push_back(i);
}
vector<int> hin(N+1);
for(int i=0;i<N;i++){
int x;cin>>x;
hin[x]++;
}
vector<pair<int,int>> S;
for(int i=1;i<=N;i++){
if(hin[i]) S.push_back(mp(i,hin[i]));
}
if(si(S)>n){
cout<<"No\n";
continue;
}
for(int i=0;i<n;i++){
dp[i]=-1;
siz[i]=0;
sp[i]=-1;
}
A.clear();
B.clear();
for(auto [a,b]:S){
A.push_back(b);
B.push_back(a);
}
for(int i=1;i<si(A);i++) A[i]+=A[i-1];
ans=-1;
make(0,-1);
solve(0,-1);
if(ans==-1){
cout<<"No\n";
}else{
cout<<"Yes\n";
make(ans,-1);
sp[ans]=B[si(B)-1];
mogu(ans,si(B)-1);
hiro(ans);
for(int i=0;i<N;i++){
if(i) cout<<" ";
cout<<ANS[i];
}
cout<<"\n";
}
for(int i=0;i<=n;i++){
G[i].clear();
bel[i].clear();
}
}
}
詳細信息
Test #1:
score: 100
Accepted
time: 2ms
memory: 5676kb
input:
5 5 4 1 2 2 3 3 4 4 5 1 2 3 4 5 5 4 1 2 1 3 1 4 1 5 1 2 3 4 5 5 4 1 2 1 3 1 4 1 5 1 2 2 2 3 5 6 1 2 1 2 2 3 3 4 4 5 3 5 1 2 1 2 1 2 2 1 2 1 2 1 2
output:
Yes 1 2 3 4 5 No Yes 2 1 2 2 3 Yes 2 2 1 1 1 No
result:
ok ok (5 test cases)
Test #2:
score: -100
Runtime Error
input:
100000 4 3 4 2 1 3 2 1 2 1 3 2 5 7 2 5 5 3 2 3 5 1 4 3 2 4 4 3 1 3 1 1 2 3 2 2 1 2 3 1 1 1 4 7 3 4 1 4 2 3 4 3 4 2 3 1 4 3 2 3 3 2 4 6 2 4 3 1 1 2 1 2 2 3 4 2 1 1 3 3 4 7 3 2 4 2 1 2 3 4 3 2 2 4 3 4 2 1 1 1 5 5 3 2 1 5 4 5 4 3 2 1 1 2 2 3 2 3 5 2 3 1 3 3 1 3 1 2 1 3 2 3 2 3 2 1 2 1 1 2 1 1 2 3 2 1 1...