結果
| 問題 |
No.416 旅行会社
|
| コンテスト | |
| ユーザー |
kei
|
| 提出日時 | 2018-12-04 23:43:45 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 3,737 bytes |
| コンパイル時間 | 2,021 ms |
| コンパイル使用メモリ | 188,536 KB |
| 実行使用メモリ | 28,032 KB |
| 最終ジャッジ日時 | 2024-07-08 11:22:29 |
| 合計ジャッジ時間 | 7,918 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 19 RE * 2 |
ソースコード
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1e9;
const ll LINF = 1e18;
inline ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
inline ll lcm(ll a, ll b) { return a / gcd(a, b)*b; }
template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }
template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }
template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; }
template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }
/*
<url:https://yukicoder.me/problems/no/416>
問題文============================================================
=================================================================
解説=============================================================
================================================================
*/
struct UnionFind{
vector<int> parent, rank;
UnionFind(int n) : parent(n, -1), rank(n, 0) { }
int find(int x){
if(parent[x] == -1) return x;
else return (parent[x] = find(parent[x]));
}
bool unite(int x, int y){
x = find(x);
y = find(y);
if(x == y) return false;
if(rank[x] < rank[y])
parent[x] = y;
else
parent[y] = x;
if(rank[x] == rank[y]) rank[x]++;
return true;
}
bool same(int x, int y){
return find(x) == find(y);
}
};
void solve(){
int N,M,Q; cin >> N >> M >> Q;
map<pii,int> mp;
for(int i = 0; i < M;i++){
int A,B; cin >> A >> B; A--; B--;
if(A > B) swap(A,B);
mp[pii(A,B)]++;
}
vector<pii> edges(Q);
for(int i = 0; i < Q;i++){
int C,D; cin >> C >> D;
C--; D--;
if(C > D) swap(C,D);
mp[pii(C,D)]--;
edges[i] = pii(C,D);
}
UnionFind UF(N);
for(auto p:mp){
if(p.second){
UF.unite(p.first.first,p.first.second);
}
}
vector<int> ans(N);
for(int i = 1; i <= N;i++){
if(UF.same(0,i)) ans[i] = -1;
}
vector<set<int>> children(N);
for(int i = 0; i < N;i++) children[UF.find(i)].insert(i);
for(int i = Q-1; i >= 0; i--){
int rootx = UF.find(edges[i].first);
int rooty = UF.find(edges[i].second);
if(rootx == rooty) continue;
int rootzero = UF.find(0);
if(rootx == rootzero){
for(auto v:children[rooty]){
ans[v] = i+1;
}
UF.unite(rootx, rooty);
}else if(rooty == rootzero){
for(auto v:children[rootx]){
ans[v] = i+1;
}
UF.unite(rootx, rooty);
}else{
UF.unite(rootx, rooty);
int next_root = UF.find(rootx);
if(next_root == rootx){
for(auto v:children[rooty]) children[rootx].insert(v);
children[rooty].clear();
}else{
for(auto v:children[rootx]) children[rooty].insert(v);
children[rootx].clear();
}
}
}
for(int i = 1; i < N;i++){
cout << ans[i] << endl;
}
}
int main(void) {
cin.tie(0); ios_base::sync_with_stdio(false);
solve();
return 0;
}
kei