結果
問題 | No.1424 Ultrapalindrome |
ユーザー | kiyoshi0205 |
提出日時 | 2021-03-12 21:33:01 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,173 bytes |
コンパイル時間 | 3,090 ms |
コンパイル使用メモリ | 203,652 KB |
実行使用メモリ | 16,248 KB |
最終ジャッジ日時 | 2024-10-14 11:43:26 |
合計ジャッジ時間 | 5,689 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 | 2 ms
5,248 KB |
testcase_01 | WA | - |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | WA | - |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | WA | - |
testcase_09 | AC | 138 ms
11,244 KB |
testcase_10 | AC | 123 ms
11,272 KB |
testcase_11 | AC | 79 ms
8,680 KB |
testcase_12 | AC | 116 ms
10,788 KB |
testcase_13 | AC | 25 ms
5,376 KB |
testcase_14 | AC | 88 ms
9,320 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 63 ms
8,124 KB |
testcase_17 | AC | 80 ms
8,956 KB |
testcase_18 | AC | 50 ms
7,128 KB |
testcase_19 | AC | 83 ms
9,036 KB |
testcase_20 | AC | 16 ms
5,248 KB |
testcase_21 | AC | 48 ms
7,892 KB |
testcase_22 | AC | 33 ms
6,220 KB |
testcase_23 | AC | 8 ms
5,248 KB |
testcase_24 | AC | 12 ms
5,248 KB |
testcase_25 | AC | 11 ms
5,248 KB |
testcase_26 | AC | 104 ms
10,184 KB |
testcase_27 | WA | - |
testcase_28 | AC | 42 ms
12,632 KB |
testcase_29 | WA | - |
testcase_30 | AC | 93 ms
16,124 KB |
testcase_31 | WA | - |
ソースコード
#pragma GCC target("avx") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include<bits/stdc++.h> // #include<ext/pb_ds/assoc_container.hpp> // #include<ext/pb_ds/tree_policy.hpp> // #include<ext/pb_ds/tag_and_trait.hpp> // using namespace __gnu_pbds; // #include<boost/multiprecision/cpp_int.hpp> // namespace multiprecisioninteger = boost::multiprecision; // using cint=multiprecisioninteger::cpp_int; using namespace std; using ll=long long; using datas=pair<ll,ll>; using ddatas=pair<long double,long double>; using tdata=pair<ll,datas>; using vec=vector<ll>; using mat=vector<vec>; using pvec=vector<datas>; using pmat=vector<pvec>; // using llset=tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>; #define For(i,a,b) for(i=a;i<(ll)b;++i) #define bFor(i,b,a) for(i=b,--i;i>=(ll)a;--i) #define rep(i,N) For(i,0,N) #define rep1(i,N) For(i,1,N) #define brep(i,N) bFor(i,N,0) #define brep1(i,N) bFor(i,N,1) #define all(v) (v).begin(),(v).end() #define allr(v) (v).rbegin(),(v).rend() #define vsort(v) sort(all(v)) #define vrsort(v) sort(allr(v)) #define uniq(v) vsort(v);(v).erase(unique(all(v)),(v).end()) #define endl "\n" #define eb emplace_back #define print(x) cout<<x<<endl #define printyes print("Yes") #define printno print("No") #define printYES print("YES") #define printNO print("NO") #define output(v) do{bool f=0;for(auto outi:v){cout<<(f?" ":"")<<outi;f=1;}cout<<endl;}while(0) #define matoutput(v) do{for(auto outimat:v)output(outimat);}while(0) constexpr ll mod=1000000007; // constexpr ll mod=998244353; constexpr ll inf=1LL<<60; constexpr long double eps=1e-9; const long double PI=acosl(-1); template<class T,class E> ostream& operator<<(ostream& os,const pair<T,E>& p){return os<<"("<<p.first<<","<<p.second<<")";} template<class T> ostream& operator<<(ostream& os,const vector<T>& v){ os<<"{";bool f=false; for(auto& x:v){if(f)os<<",";os<<x;f=true;} os<<"}"; return os; } template<class T> ostream& operator<<(ostream& os,const set<T>& v){ os<<"{";bool f=false; for(auto& x:v){if(f)os<<",";os<<x;f=true;} os<<"}"; return os; } template<class T,class E> ostream& operator<<(ostream& os,const map<T,E>& v){ os<<"{";bool f=false; for(auto& x:v){if(f)os<<",";os<<x;f=true;} os<<"}"; return os; } template<class T> inline bool chmax(T& a,T b){bool x=a<b;if(x)a=b;return x;} template<class T> inline bool chmin(T& a,T b){bool x=a>b;if(x)a=b;return x;} #ifdef DEBUG void debugg(){cout<<endl;} template<class T,class... Args>void debugg(const T& x,const Args&... args){cout<<" "<<x;debugg(args...);} #define debug(...) cout<<__LINE__<<" ["<<#__VA_ARGS__<<"]:",debugg(__VA_ARGS__) #else #define debug(...) (void(0)) #endif void startupcpp(){ cin.tie(0); ios::sync_with_stdio(false); cout<<fixed<<setprecision(15); } long double distance(ddatas x,ddatas y){ long double a=x.first-y.first,b=x.second-y.second; return sqrtl(a*a+b*b); } ll modinv(ll a,ll m=mod) { ll b=m,u=1,v=0,t; while(b){ t=a/b; a-=t*b; swap(a,b); u-=t*v; swap(u,v); } return (u+m)%m; } ll moddevide(ll a,ll b){return (a*modinv(b))%mod;} vec modncrlistp,modncrlistm; ll modncr(ll n,ll r){ if(n<r)return 0; ll i,size=modncrlistp.size(); if(size<=n){ modncrlistp.resize(n+1); modncrlistm.resize(n+1); if(!size){ modncrlistp[0]=modncrlistm[0]=1; size++; } For(i,size,n+1)modncrlistp[i]=modncrlistp[i-1]*i%mod; modncrlistm[n]=modinv(modncrlistp[n]); for(i=n;i>size;--i)modncrlistm[i-1]=modncrlistm[i]*i%mod; } return modncrlistp[n]*modncrlistm[r]%mod*modncrlistm[n-r]%mod; } ll modpow(ll a,ll n,ll m=mod){ if(n<0)return 0; ll res=1; while(n>0){ if(n&1)res=res*a%m; a=a*a%m; n>>=1; } return res; } ll gcd(ll a,ll b){if(!b)return abs(a);return (a%b==0)?abs(b):gcd(b,a%b);} ll lcm(ll a,ll b){return a/gcd(a,b)*b;} ll countdigits(ll n,ll k=10){ ll ans=0; while(n){n/=k;ans++;} return ans; } ll sumdigits(ll n,ll k=10){ ll ans=0; while(n){ans+=n%k;n/=k;} return ans; } vector<ll> dijkstra(pmat& g,ll first){ priority_queue<datas,pvec,greater<datas>> que; que.emplace(0,first); vector<ll> dist(g.size(),inf); while(!que.empty()){ datas x=que.top();que.pop(); if(!chmin(dist[x.second],x.first))continue; for(auto next:g[x.second]){ if(dist[next.second]<inf)continue; next.first+=x.first; que.emplace(next); } } return dist; } ll N,M,K,H,W,A,B,C,D; string s,t; ll ans; int main(){ startupcpp(); cin>>N; ll i,j; pmat g(N); rep(i,N-1){ cin>>A>>B; --A;--B; g[A].emplace_back(1,B); g[B].emplace_back(1,A); } { auto dist=dijkstra(g,0); A=max_element(all(dist))-dist.begin(); } auto v1=dijkstra(g,A); B=max_element(all(v1))-v1.begin(); auto v2=dijkstra(g,B); D=*max_element(all(v2)); rep(C,N){ if(v1[C]==D/2&&v2[C]==D-D/2)break; if(v2[C]==D/2&&v1[C]==D-D/2)break; } auto dist=dijkstra(g,C); debug(C,D,dist); set<ll> se; rep(i,N){ if(g[i].size()==1){ se.emplace(dist[i]); } } if(se.size()==1)printyes; if(se.size()==2){ if(D&1)printyes; else printno; } if(se.size()>=3)printno; }