結果
問題 | No.416 旅行会社 |
ユーザー | kei |
提出日時 | 2018-12-05 00:07:54 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 550 ms / 4,000 ms |
コード長 | 3,647 bytes |
コンパイル時間 | 2,488 ms |
コンパイル使用メモリ | 186,708 KB |
実行使用メモリ | 37,760 KB |
最終ジャッジ日時 | 2024-12-14 20:35:20 |
合計ジャッジ時間 | 8,796 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 231 ms
20,864 KB |
testcase_01 | AC | 4 ms
8,576 KB |
testcase_02 | AC | 5 ms
8,576 KB |
testcase_03 | AC | 5 ms
8,548 KB |
testcase_04 | AC | 4 ms
8,704 KB |
testcase_05 | AC | 6 ms
8,576 KB |
testcase_06 | AC | 5 ms
8,576 KB |
testcase_07 | AC | 5 ms
8,692 KB |
testcase_08 | AC | 10 ms
9,036 KB |
testcase_09 | AC | 32 ms
10,624 KB |
testcase_10 | AC | 254 ms
20,864 KB |
testcase_11 | AC | 280 ms
25,472 KB |
testcase_12 | AC | 283 ms
27,776 KB |
testcase_13 | AC | 254 ms
25,344 KB |
testcase_14 | AC | 505 ms
34,304 KB |
testcase_15 | AC | 540 ms
36,480 KB |
testcase_16 | AC | 550 ms
37,760 KB |
testcase_17 | AC | 546 ms
36,480 KB |
testcase_18 | AC | 540 ms
35,992 KB |
testcase_19 | AC | 371 ms
25,976 KB |
testcase_20 | AC | 357 ms
24,436 KB |
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); } }; map<pii,int> mp; set<int> children[100005]; UnionFind UF(100005); void solve(){ int N,M,Q; cin >> N >> M >> Q; 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); } 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; } 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); }else{ for(auto v:children[rootx]) children[rooty].insert(v); } } } 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; }