結果
問題 | No.1424 Ultrapalindrome |
ユーザー | yuto1115 |
提出日時 | 2021-03-12 21:37:55 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 42 ms / 2,000 ms |
コード長 | 4,247 bytes |
コンパイル時間 | 2,084 ms |
コンパイル使用メモリ | 212,096 KB |
実行使用メモリ | 21,888 KB |
最終ジャッジ日時 | 2024-10-14 16:09:40 |
合計ジャッジ時間 | 3,605 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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
6,820 KB |
testcase_01 | AC | 1 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,820 KB |
testcase_05 | AC | 2 ms
6,820 KB |
testcase_06 | AC | 2 ms
6,820 KB |
testcase_07 | AC | 2 ms
6,816 KB |
testcase_08 | AC | 2 ms
6,820 KB |
testcase_09 | AC | 28 ms
7,936 KB |
testcase_10 | AC | 28 ms
7,936 KB |
testcase_11 | AC | 18 ms
6,820 KB |
testcase_12 | AC | 24 ms
7,680 KB |
testcase_13 | AC | 8 ms
6,820 KB |
testcase_14 | AC | 20 ms
6,820 KB |
testcase_15 | AC | 1 ms
6,816 KB |
testcase_16 | AC | 16 ms
6,820 KB |
testcase_17 | AC | 20 ms
6,912 KB |
testcase_18 | AC | 15 ms
6,820 KB |
testcase_19 | AC | 23 ms
6,820 KB |
testcase_20 | AC | 6 ms
6,816 KB |
testcase_21 | AC | 19 ms
6,816 KB |
testcase_22 | AC | 13 ms
6,816 KB |
testcase_23 | AC | 3 ms
6,816 KB |
testcase_24 | AC | 6 ms
6,816 KB |
testcase_25 | AC | 6 ms
6,820 KB |
testcase_26 | AC | 29 ms
7,424 KB |
testcase_27 | AC | 41 ms
9,856 KB |
testcase_28 | AC | 41 ms
21,760 KB |
testcase_29 | AC | 42 ms
21,888 KB |
testcase_30 | AC | 24 ms
10,012 KB |
testcase_31 | AC | 27 ms
10,196 KB |
ソースコード
//@formatter:off #include<bits/stdc++.h> #define overload4(_1,_2,_3,_4,name,...) name #define rep1(i,n) for (ll i = 0; i < ll(n); ++i) #define rep2(i,s,n) for (ll i = ll(s); i < ll(n); ++i) #define rep3(i,s,n,d) for(ll i = ll(s); i < ll(n); i+=d) #define rep(...) overload4(__VA_ARGS__,rep3,rep2,rep1)(__VA_ARGS__) #define rrep1(i,n) for (ll i = ll(n)-1; i >= 0; i--) #define rrep2(i,n,t) for (ll i = ll(n)-1; i >= (ll)t; i--) #define rrep3(i,n,t,d) for (ll i = ll(n)-1; i >= (ll)t; i-=d) #define rrep(...) overload4(__VA_ARGS__,rrep3,rrep2,rrep1)(__VA_ARGS__) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define popcount(x) __builtin_popcount(x) #define pb push_back #define eb emplace_back #ifdef __LOCAL #define debug(...) { cout << #__VA_ARGS__; cout << ": "; print(__VA_ARGS__); cout << flush; } #else #define debug(...) void(0) #endif #define INT(...) int __VA_ARGS__;scan(__VA_ARGS__) #define LL(...) ll __VA_ARGS__;scan(__VA_ARGS__) #define STR(...) string __VA_ARGS__;scan(__VA_ARGS__) #define CHR(...) char __VA_ARGS__;scan(__VA_ARGS__) #define DBL(...) double __VA_ARGS__;scan(__VA_ARGS__) #define LD(...) ld __VA_ARGS__;scan(__VA_ARGS__) using namespace std; using ll = long long; using ld = long double; using P = pair<int,int>; using LP = pair<ll,ll>; using vi = vector<int>; using vvi = vector<vector<int>>; using vl = vector<ll>; using vvl = vector<vector<ll>>; using vd = vector<double>; using vvd = vector<vector<double>>; using vs = vector<string>; using vc = vector<char>; using vvc = vector<vector<char>>; using vb = vector<bool>; using vvb = vector<vector<bool>>; using vp = vector<P>; using vvp = vector<vector<P>>; template<class S,class T> istream& operator>>(istream &is,pair<S,T> &p) { return is >> p.first >> p.second; } template<class S,class T> ostream& operator<<(ostream &os,const pair<S,T> &p) { return os<<'{'<<p.first<<","<<p.second<<'}'; } template<class T> istream& operator>>(istream &is,vector<T> &v) { for(T &t:v){is>>t;} return is; } template<class T> ostream& operator<<(ostream &os,const vector<T> &v) { os<<'[';rep(i,v.size())os<<v[i]<<(i==int(v.size()-1)?"":","); return os<<']'; } template<class T> void vecout(const vector<T> &v,char div='\n') { rep(i,v.size()) cout<<v[i]<<(i==int(v.size()-1)?'\n':div);} template<class T> bool chmin(T& a,T b) {if(a > b){a = b; return true;} return false;} template<class T> bool chmax(T& a,T b) {if(a < b){a = b; return true;} return false;} void scan(){} template <class Head, class... Tail> void scan(Head& head, Tail&... tail){ cin >> head; scan(tail...); } template<class T> void print(const T& t){ cout << t << '\n'; } template <class Head, class... Tail> void print(const Head& head, const Tail&... tail){ cout<<head<<' '; print(tail...); } template<class... T> void fin(const T&... a) { print(a...); exit(0); } const string yes[] = {"no","yes"}; const string Yes[] = {"No","Yes"}; const string YES[] = {"NO","YES"}; const int inf = 1001001001; const ll linf = 1001001001001001001; //@formatter:on int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); INT(n); vvi G(n); vi deg(n); rep(_, n - 1) { INT(a, b); a--, b--; G[a].pb(b); G[b].pb(a); deg[a]++; deg[b]++; } if (n == 2) fin("Yes"); int r = -1; rep(i, n) if (deg[i] > 1) r = i; assert(r != -1); int len = -1; auto dfs = [&](auto &dfs, int u, int p) -> int { vi ls; for (int v : G[u]) { if (v == p) continue; ls.pb(dfs(dfs, v, u)); } if (ls.size() == 0) return 0; if (ls.size() == 1) return (ls[0] >= 0 ? ls[0] + 1 : -1); if (any_of(all(ls), [&](int i) { return i == -1; })) fin("No"); if (ls.size() == 2) { int now = ls[0] + ls[1] + 2; if (len != -1 and len != now) fin("No"); len = now; return (ls[0] == ls[1] ? ls[0] + 1 : -1); } else { sort(all(ls)); if (ls[0] != ls.back()) fin("No"); int now = (ls[0] + 1) * 2; if (len != -1 and len != now) fin("No"); len = now; return now / 2; } }; dfs(dfs, r, -1); fin("Yes"); }