結果

問題 No.1983 [Cherry 4th Tune C] 南の島のマーメイド
ユーザー mikammikam
提出日時 2022-08-28 21:53:38
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 497 ms / 4,000 ms
コード長 4,215 bytes
コンパイル時間 4,871 ms
コンパイル使用メモリ 270,604 KB
実行使用メモリ 47,460 KB
最終ジャッジ日時 2024-10-15 18:51:08
合計ジャッジ時間 21,277 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
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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 AC 3 ms
5,248 KB
testcase_02 AC 3 ms
5,248 KB
testcase_03 AC 3 ms
5,248 KB
testcase_04 AC 3 ms
5,248 KB
testcase_05 AC 3 ms
5,248 KB
testcase_06 AC 3 ms
5,248 KB
testcase_07 AC 3 ms
5,248 KB
testcase_08 AC 14 ms
5,248 KB
testcase_09 AC 18 ms
5,248 KB
testcase_10 AC 19 ms
5,248 KB
testcase_11 AC 21 ms
5,248 KB
testcase_12 AC 24 ms
5,248 KB
testcase_13 AC 298 ms
14,688 KB
testcase_14 AC 346 ms
17,772 KB
testcase_15 AC 353 ms
19,296 KB
testcase_16 AC 214 ms
13,824 KB
testcase_17 AC 336 ms
19,048 KB
testcase_18 AC 267 ms
19,392 KB
testcase_19 AC 311 ms
25,364 KB
testcase_20 AC 290 ms
18,368 KB
testcase_21 AC 308 ms
20,372 KB
testcase_22 AC 346 ms
23,944 KB
testcase_23 AC 486 ms
28,292 KB
testcase_24 AC 485 ms
28,388 KB
testcase_25 AC 487 ms
28,324 KB
testcase_26 AC 486 ms
28,408 KB
testcase_27 AC 497 ms
28,284 KB
testcase_28 AC 483 ms
28,388 KB
testcase_29 AC 490 ms
28,436 KB
testcase_30 AC 483 ms
28,272 KB
testcase_31 AC 490 ms
28,392 KB
testcase_32 AC 490 ms
28,384 KB
testcase_33 AC 2 ms
5,248 KB
testcase_34 AC 312 ms
13,440 KB
testcase_35 AC 381 ms
41,472 KB
testcase_36 AC 365 ms
19,712 KB
testcase_37 AC 2 ms
5,248 KB
testcase_38 AC 293 ms
5,248 KB
testcase_39 AC 394 ms
47,460 KB
testcase_40 AC 366 ms
24,596 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <atcoder/all>
using namespace atcoder;
#include <bits/stdc++.h>
using namespace std;
// #include <boost/multiprecision/cpp_int.hpp>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for (int i = (int)(a); i <= (int)(b); i++)
#define all(v) v.begin(),v.end()
#define inc(x,l,r) ((l)<=(x)&&(x)<(r)) 
#define Unique(x) sort(all(x)), x.erase(unique(all(x)), x.end())
typedef long long ll;
#define int ll
using ld = long double;
using vi = vector<int>;
using vs = vector<string>;
using P = pair<int,int>;
using vp = vector<P>;
// using Bint = boost::multiprecision::cpp_int;
template<typename T> using priority_queue_greater = priority_queue<T, vector<T>, greater<T>>;
template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){rep(i,v.size())os<<v[i]<<(i+1!=v.size()?" ":"");return os;}
template<typename T> istream &operator>>(istream& is,vector<T> &v){for(T &in:v)is>>in;return is;}
template<class... T> void _IN(T&... a){(cin>> ... >> a);}
template<class T> void _OUT(T& a){cout <<a<< '\n';}
template<class T,class... Ts> void _OUT(const T&a, const Ts&... b){cout<< a;(cout<<...<<(cout<<' ',b));cout<<'\n';}
#define INT(...) int __VA_ARGS__; _IN(__VA_ARGS__)
#define STR(...) string __VA_ARGS__; _IN(__VA_ARGS__)
#define pcnt __builtin_popcountll
int ceil(int x,int y){return x/y+!!(x%y);}
int abs(int x,int y){return abs(x-y);}
bool ins(string s,string t){return s.find(t)!=string::npos;}
P operator+ (const P &p, const P &q){ return P{p.first+q.first,p.second+q.second};}
P operator- (const P &p, const P &q){ return P{p.first-q.first,p.second-q.second};}
template<typename T1,typename T2> ostream &operator<< (ostream &os, const pair<T1,T2> &p){os << p.first <<" "<<p.second;return os;}
ostream &operator<< (ostream &os, const modint1000000007 &m){os << m.val();return os;}
istream &operator>> (istream &is, modint1000000007 &m){ll in;is>>in;m=in;return is;}
ostream &operator<< (ostream &os, const modint998244353 &m){os << m.val();return os;}
istream &operator>> (istream &is, modint998244353 &m){ll in;is>>in;m=in;return is;}
template<typename T1,typename T2> bool chmax(T1 &a, const T2 b) {if (a < b) {a = b; return true;} else return false; }
template<typename T1,typename T2> bool chmin(T1 &a, const T2 b) {if (a > b) {a = b; return true;} else return false; }
void yesno(bool ok,string y="Yes",string n="No"){ cout<<(ok?y:n)<<endl;}
int di[]={-1,0,1,0,-1,-1,1,1};
int dj[]={0,1,0,-1,-1,1,-1,1};
const int INF = 8e18;
//using mint = modint1000000007;
//using mint = modint998244353;
template< typename G >
struct LowLink {
    const G &g;
    vector< int > used, ord, low;
    vector< int > articulation;//切断点
    vector< pair< int, int > > bridge;//橋
    
    LowLink(const G &g) : g(g) {}
    
    int dfs(int idx, int k, int par) {
        used[idx] = true;
        ord[idx] = k++;
        low[idx] = ord[idx];
        bool is_articulation = false;
        int cnt = 0;
        for(auto &to : g[idx]) {
            if(!used[to]) {
                ++cnt;
                k = dfs(to, k, idx);
                low[idx] = min(low[idx], low[to]);
                is_articulation |= ~par && low[to] >= ord[idx];
                if(ord[idx] < low[to]) bridge.emplace_back(minmax(idx, (int) to));
            } else if(to != par) {
                low[idx] = min(low[idx], ord[to]);
            }
        }
        is_articulation |= par == -1 && cnt > 1;
        if(is_articulation) articulation.push_back(idx);
        return k;
    }
    
    virtual void build() {
        used.assign(g.size(), 0);
        ord.assign(g.size(), 0);
        low.assign(g.size(), 0);
        int k = 0;
        for(int i = 0; i < g.size(); i++) {
            if(!used[i]) k = dfs(i, k, -1);
        }
    }
};
signed main() {
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);

    INT(n,m,q);
    vector<vi> G(n);
    rep(i,m){
        INT(u,v);
        --u;--v;
        G[u].push_back(v);
        G[v].push_back(u);
    }

    LowLink<vector<vi>> L(G);
    L.build();
    dsu uf(n);
    for(auto &[u,v]:L.bridge)uf.merge(u,v);

    while(q--){
        INT(x,y);
        --x;--y;
        yesno(uf.same(x,y));
    }
    return 0;
}
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