結果
| 問題 |
No.977 アリス仕掛けの摩天楼
|
| ユーザー |
kei
|
| 提出日時 | 2020-01-31 21:36:57 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 38 ms / 2,000 ms |
| コード長 | 2,996 bytes |
| コンパイル時間 | 1,655 ms |
| コンパイル使用メモリ | 174,052 KB |
| 実行使用メモリ | 9,020 KB |
| 最終ジャッジ日時 | 2024-09-17 07:22:11 |
| 合計ジャッジ時間 | 2,537 ms |
|
ジャッジサーバーID (参考情報) |
judge6 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 26 |
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;
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; }
template<typename T>vector<T> make_v(size_t a){return vector<T>(a);}
template<typename T,typename... Ts>auto make_v(size_t a,Ts... ts){return vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));}
template<typename T,typename V> typename enable_if<is_class<T>::value==0>::type fill_v(T &t,const V &v){t=v;}
template<typename T,typename V> typename enable_if<is_class<T>::value!=0>::type fill_v(T &t,const V &v){for(auto &e:t) fill_v(e,v);}
/*
<url:>
問題文============================================================
=================================================================
解説=============================================================
================================================================
*/
/*
UnionFind
*/
struct UnionFind {
vector<int> data;
UnionFind(int size) : data(size, -1) { }
bool unionSet(int x, int y) {
x = root(x); y = root(y);
if (x != y) {
if (data[y] < data[x]) swap(x, y);
data[x] += data[y]; data[y] = x;
}
return x != y;
}
bool findSet(int x, int y) {
return root(x) == root(y);
}
int root(int x) {
return data[x] < 0 ? x : data[x] = root(data[x]);
}
int size(int x) {
return -data[root(x)];
}
};
template<class Type>
Type solve(Type res = Type()){
int N; cin >> N;
UnionFind UF(N);
vector<vector<int>> G(N);
for(int i = 0; i < N-1;i++){
int u,v; cin >> u >> v;
UF.unionSet(u,v);
G[u].push_back(v);
G[v].push_back(u);
}
int sz = UF.size(0);
if(sz == N) return "Bob";
if(sz == 1 || sz == N-1){
bool ok = true;
for(int i = 0; i < N;i++){
if(UF.size(i) == 1) continue;
if(G[i].size() == 2) continue;
ok = false;
}
if(ok) return "Bob";
}
return "Alice";
return res;
}
int main(void) {
cin.tie(0); ios::sync_with_stdio(false);
//solve<ll>(0);
cout << fixed << setprecision(12) << solve<string>() << endl;
return 0;
}
kei