結果
問題 | No.1424 Ultrapalindrome |
ユーザー |
|
提出日時 | 2022-04-22 17:04:03 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,207 bytes |
コンパイル時間 | 4,399 ms |
コンパイル使用メモリ | 258,044 KB |
最終ジャッジ日時 | 2025-01-28 19:37:26 |
ジャッジサーバーID (参考情報) |
judge1 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 18 WA * 11 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>using namespace std;using namespace atcoder;typedef long long ll;typedef long double ld;#define REP(i, n) for (int i = 0; i < (n); ++i)#define REPR(i, n) for (int i = n - 1; i >= 0; --i)#define FOR(i, m, n) for (int i = m; i < n; ++i)#define FORR(i, m, n) for (int i = m; i >= n; --i)#define ALL(v) (v).begin(),(v).end()#define ALLR(v) (v).rbegin(),(v).rend()#define fi first#define se second#define PB push_back#define EB emplace_backtemplate<typename T> using PQ = priority_queue<T>;template<typename T> using QP = priority_queue<T,vector<T>,greater<T>>;template<typename T>void debug(const T &v,ll h,ll w){for(ll i=0;i<h;i++){for(ll j=0;j<w;j++)cout<<v[i][j]<<" \n"[j==w-1];}};template<typename T>void debug(const T &v,ll n){for(ll i=0;i<n;i++)cout<<v[i]<<" \n"[i==n-1];};template<typename T>void debug(const vector<T>&v){debug(v,v.size());}template<typename T>void debug(const vector<vector<T>>&v){for(auto &vv:v)debug(vv,vv.size());}template<typename T>void debug(stack<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}template<typename T>void debug(queue<T> st){while(!st.empty()){cout<<st.front()<<" ";st.pop();}cout<<endl;}template<typename T>void debug(deque<T> st){while(!st.empty()){cout<<st.front()<<" ";st.pop_front();}cout<<endl;}template<typename T>void debug(PQ<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}template<typename T>void debug(QP<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}template<typename T>void debug(const set<T>&v){for(auto z:v)cout<<z<<" ";cout<<endl;}template<typename T>void debug(const multiset<T>&v){for(auto z:v)cout<<z<<" ";cout<<endl;}template<typename T,size_t size>void debug(const array<T, size> &a){for(auto z:a)cout<<z<<" ";cout<<endl;}template<typename T,typename V>void debug(const map<T,V>&v){for(auto z:v)cout<<"["<<z.first<<"]="<<z.second<<",";cout<<endl;}template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }int popcount(ll x){return __builtin_popcountll(x);};int poplow(ll x){return __builtin_ctzll(x);};int pophigh(ll x){return 63 - __builtin_clzll(x);};const ll INF=1LL<<60;const int inf=(1<<30)-1;// const int mod=1e9+7;const int mod=998244353;int dx[8]={1,0,-1,0,-1,-1,1,1};int dy[8]={0,1,0,-1,-1,1,-1,1};using mint=modint998244353;// using mint=modint1000000007;int main(){cin.tie(0);ios::sync_with_stdio(false);int n;cin >> n;vector<vector<int>> e(n);vector<int> h(n);for (int i = 0; i < n-1; i++){int a,b;cin >> a >> b;a--,b--;e[a].push_back(b);e[b].push_back(a);h[a]++,h[b]++;}vector<int> d(n);auto dfs=[&](auto &&dfs,int cur,int pre=-1)->void{for(auto to:e[cur]){if(to==pre) continue;d[to]=d[cur]+1;dfs(dfs,to,cur);}};REP(i,n){if(h[i]==1){dfs(dfs,i);break;}}map<int,int> mp;FOR(i,1,n) if(h[i]==1) mp[d[i]]++;cout << (mp.size()==1?"Yes":"No") << endl;}