結果
| 問題 |
No.977 アリス仕掛けの摩天楼
|
| ユーザー |
okuraofvegetabl
|
| 提出日時 | 2020-01-31 21:35:23 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 6,039 bytes |
| コンパイル時間 | 1,700 ms |
| コンパイル使用メモリ | 173,176 KB |
| 実行使用メモリ | 9,216 KB |
| 最終ジャッジ日時 | 2024-09-17 07:20:07 |
| 合計ジャッジ時間 | 2,989 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | WA * 26 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
// #define int long long
#define pb push_back
#define mp make_pair
#define eps 1e-9
#define INF 2000000000 //2e9
#define LLINF 1000000000000000ll // 1e15
#define fi first
#define sec second
#define all(x) (x).begin(),(x).end()
#define sq(x) ((x)*(x))
#define dmp(x) cerr << #x << ": " << x << endl;
template<class T> void chmin(T& a,const T& b){if(a>b)a=b;}
template<class T> void chmax(T& a,const T& b){if(a<b)a=b;}
template<class T> using MaxHeap = priority_queue<T>;
template<class T> using MinHeap = priority_queue<T,vector<T>,greater<T>>;
template<class T> vector<T> vect(int len,T elem){ return vector<T>(len,elem); }
template<class T,class U>
ostream& operator << (ostream& os,const pair<T,U>& p){
os << p.fi << ',' << p.sec; return os;
}
template<class T,class U>
istream& operator >> (istream& is,pair<T,U>& p){
is >> p.fi >> p.sec; return is;
}
template<class T>
ostream& operator << (ostream &os,const vector<T> &vec){
for(int i=0;i<vec.size();i++){
os << vec[i];
if(i+1<vec.size())os << ' ';
}
return os;
}
template<class T>
istream& operator >> (istream &is,vector<T>& vec){
for(int i=0;i<vec.size();i++)is >> vec[i];
return is;
}
void fastio(){
cin.tie(0);
ios::sync_with_stdio(0);
cout<<fixed<<setprecision(20);
}
namespace Math{
template<int MOD> // if inv is needed, this shold be prime.
struct ModInt{
ll val;
ModInt():val(0ll){}
ModInt(const ll& v):val(((v%MOD)+MOD)%MOD){}
bool operator==(const ModInt& x)const{return val==x.val;}
bool operator!=(const ModInt& x)const{return !(*this==x);}
bool operator<(const ModInt& x)const{return val<x.val;}
bool operator>(const ModInt& x)const{return val>x.val;}
bool operator>=(const ModInt& x)const{return !(*this<x);}
bool operator<=(const ModInt& x)const{return !(*this>x);}
ModInt& operator+=(const ModInt& x){if((val+=x.val)>=MOD)val-=MOD;return *this;}
ModInt& operator-=(const ModInt& x){if((val+=MOD-x.val)>=MOD)val-=MOD;return *this;}
ModInt& operator*=(const ModInt& x){(val*=x.val)%=MOD;return *this;}
ModInt operator+(const ModInt& x)const{return ModInt(*this)+=x;}
ModInt operator-(const ModInt& x)const{return ModInt(*this)-=x;}
ModInt operator*(const ModInt& x)const{return ModInt(*this)*=x;}
friend istream& operator>>(istream&i,ModInt& x){ll v;i>>v;x=v;return i;}
friend ostream& operator<<(ostream&o,const ModInt& x){o<<x.val;return o;}
};
template<int MOD>
ModInt<MOD> pow(ModInt<MOD> a,ll x){
ModInt<MOD> res = ModInt<MOD>(1ll);
while(x){
if(x&1)res *= a;
x >>= 1;
a = a*a;
}
return res;
}
constexpr int MOD = 1e9+7;
using mint = ModInt<MOD>;
vector<mint> inv,fac,facinv;
// notice: 0C0 = 1
ModInt<MOD> nCr(int n,int r){
assert(!(n<r));
assert(!(n<0||r<0));
return fac[n]*facinv[r]*facinv[n-r];
}
void init(int SIZE){
fac.resize(SIZE+1);
inv.resize(SIZE+1);
facinv.resize(SIZE+1);
fac[0] = inv[1] = facinv[0] = mint(1ll);
for(int i=1;i<=SIZE;i++)fac[i]=fac[i-1]*mint(i);
for(int i=2;i<=SIZE;i++)inv[i]=mint(0ll)-mint(MOD/i)*inv[MOD%i];
for(int i=1;i<=SIZE;i++)facinv[i]=facinv[i-1]*inv[i];
return;
}
template<class T>
int digit(T x){
int res = 0;
while(x){
x /= T(10);
res++;
}
return res;
}
}
namespace DS{
template<class T>
struct RangeSum{
vector<T> vec;
RangeSum(){}
RangeSum(vector<T> elems):vec(elems){
for(int i=1;i<vec.size();i++){
vec[i] += vec[i-1];
}
}
T sum(int l,int r){
if(l>r)return T(0);
if(l==0)return vec[r];
else return vec[r]-vec[l-1];
}
};
template<class T>
struct BIT{
int N;
vector<T> bit;
BIT(int N):N(N){
bit = vector<T>(N+1,T(0));
}
void add(int i,T x){
i++;
while(i<=N){
bit[i]+=x;
i+=i&-i;
}
return;
}
T sum(int i){
i++;
T res = T(0);
while(i>0){
res+=bit[i];
i-=i&-i;
}
return res;
}
T sum(int l,int r){// [l,r]
assert(l<=r);
if(l==0)return sum(r);
else return sum(r)-sum(l-1);
}
};
template<class T>
struct SlideMin{
vector<T> v;
deque<int> deq;
SlideMin(vector<T> &v):v(v){}
void add(int id){
while(!deq.empty()&&v[deq.back()]>=v[id])deq.pop_back();
deq.push_back(id);
}
T get(int id){ // [id,added]
while(!deq.empty()&&deq.front()<id)deq.pop_front();
assert(!deq.empty());
return v[deq.front()];
}
};
template<class T>
struct SlideMax{
vector<T> v;
deque<int> deq;
SlideMax(vector<T> &v):v(v){}
void add(int id){
while(!deq.empty()&&v[deq.back()]<=v[id])deq.pop_back();
deq.push_back(id);
}
T get(int id){ // [id,added]
while(!deq.empty()&&deq.front()<id)deq.pop_front();
assert(!deq.empty());
return v[deq.front()];
}
};
}
namespace Util{
template<class T>
vector<pair<T,int>> runLength(vector<T> v){
vector<pair<T,int>> res;
for(int i=0;i<v.size();i++){
if(res.empty()||res.back().first!=v[i])res.push_back(make_pair(v[i],1));
else res.back().second++;
}
return res;
}
template<class T>
void compress(vector<T> &v){
sort(v.begin(),v.end());
v.erase(unique(v.begin(),v.end()),v.end());
}
}
int N;
vector<int> G[100100];
bool used[100100];
void dfs(int v){
used[v] = true;
for(int i=0;i<G[v].size();i++){
int u = G[v][i];
if(!used[u])dfs(u);
}
}
signed main(){
fastio();
int N;
cin >> N;
for(int i=0;i<N-1;i++){
int u,v;
cin >> u >> v;
G[u].pb(v);
G[v].pb(u);
}
int cnt = 0;
memset(used,false,sizeof(used));
for(int i=0;i<N;i++){
if(!used[i]){
cnt++;
dfs(i);
}
}
cout << cnt << endl;
if(cnt==1)cout << "Bob" << endl;
else cout << "Alice" << endl;
return 0;
}
okuraofvegetabl