結果
問題 | No.2319 Friends+ |
ユーザー |
|
提出日時 | 2023-08-09 18:49:56 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 2,925 ms / 3,000 ms |
コード長 | 3,991 bytes |
コンパイル時間 | 4,353 ms |
コンパイル使用メモリ | 263,484 KB |
最終ジャッジ日時 | 2025-02-16 00:25:20 |
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 |
---|---|
sample | AC * 2 |
other | AC * 45 |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> #define SELECTER(_1,_2,_3,SELECT,...) SELECT #define rep1(i,n) for(int i=0;i<(int)n;++i) #define rep2(i,a,n) for(int i=(int)a;i<(int)n;++i) #define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__) #define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT #define rrep1(i,n) for(int i=(int)n-1;i>=0;--i) #define rrep2(i,a,n) for(int i=(int)n-1;i>=(int)a;--i) #define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define fi first #define se second #define PrintR LogOutput #ifdef _DEBUG #define Log(...) LogOutput(__VA_ARGS__) #else #define Log(...) #endif using namespace std; using namespace atcoder; using ll=long long; using pii=pair<int,int>; using pll=pair<long long,long long>; using pdd=pair<long double,long double>; using veci=vector<int>; using vecpii=vector<pair<int,int>>; using vecll=vector<long long>; using vecpll=vector<pair<long long,long long>>; using vecpdd=vector<pair<long double,long double>>; using vecs=vector<string>; using vecb=vector<bool>; using vecd=vector<double>; using tp=tuple<int,int,int>; using tpll=tuple<ll,ll,ll>; using mint=modint998244353; using mint10=modint1000000007; template<typename T, typename S> istream& operator>>(istream& in, pair<T, S>& a){return in >> a.first >> a.second;} template<typename T, typename S> ostream& operator<<(ostream& out, const pair<T, S>& a){return out << a.first << ' ' << a.second;} ostream& operator<<(ostream& out, const mint& a){return out << a.val();} ostream& operator<<(ostream& out, const mint10& a){return out << a.val();} ostream& operator<<(ostream& out, const modint& a){return out << a.val();} template<typename T> ostream& operator<<(ostream& out, const vector<T>& d){for(int i = 0 ; i < d.size() ; ++i) out << d[i] << (i == d.size() - 1 ? "" : " "); return out;} template<typename T, typename S> pair<T, S> operator+(const pair<T, S>& a, const pair<T, S>& b){return {a.fi + b.fi, a.se + b.se};} template<typename T, typename S> pair<T, S> operator-(const pair<T, S>& a, const pair<T, S>& b){return {a.fi - b.fi, a.se - b.se};} template<class T> inline bool chmax(T& a,T b){if(a<b) {a=b;return true;} return false;} template<class T> inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;} bool Judge(int i, int j, int h, int w){return i < 0 || j < 0 || i >= h || j >= w;} constexpr ll INF=numeric_limits<ll>::max() / 4; constexpr ll MOD=998244353; const int vi[] = {0, 1, 0, -1}, vj[] = {1, 0, -1, 0}; template<typename... Args> void LogOutput(Args&&... args){ stringstream ss; ((ss << args << ' '), ...); cout << ss.str().substr(0, ss.str().length() - 1) << endl; } template<typename T> void LogOutput(vector<vector<T>>& data){for(auto d : data) LogOutput(d);} int main(){ ios::sync_with_stdio(false); std::cin.tie(nullptr); int n, m;cin>>n>>m; veci p(n); rep(i, n) cin>>p[i], p[i]--; vecpii e(m); veci deg(n, 0); rep(i, m){ int b, c;cin>>b>>c; b--, c--; e[i] = {b, c}; deg[b]++; deg[c]++; } int sq = sqrt(n) + 1; vector<veci> g(n), g2(n); vector<map<int, int>> mp(n); rep(i, m){ auto [u, v] = e[i]; if(deg[u] < sq){ if(deg[v] >= sq) mp[p[u]][v]++; g[u].push_back(v); } if(deg[v] < sq){ if(deg[u] >= sq) mp[p[v]][u]++; g[v].push_back(u); } if(deg[u] >= sq && deg[v] >= sq){ g2[u].push_back(v); g2[v].push_back(u); } } int q;cin>>q; rep(qi, q){ int x, y;cin>>x>>y; x--, y--; if(p[x] == p[y]){ cout<<"No"<<endl; continue; } bool u = false; if(deg[x] < sq){ for(int nv : g[x]) if(p[nv] == p[y]){ u = true; break; } if(u){ for(int nv : g[x]) if(deg[nv] >= sq){ mp[p[x]][nv]--; if(mp[p[x]][nv] == 0) mp[p[x]].erase(nv); mp[p[y]][nv]++; } } }else{ for(int nv : g2[x]) if(p[nv] == p[y]){ u = true; break; } if(mp[p[y]].count(x)) u = true; } if(u){ cout<<"Yes"<<endl; p[x] = p[y]; }else cout<<"No"<<endl; } }