#716976 (C++17) No.1744 Selfish Spies 1 (à la Princess' Perfectionism)

提出ソース

結果

問題	No.1744 Selfish Spies 1 (à la Princess' Perfectionism)
ユーザー	otera
提出日時	2021-11-17 03:54:17
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	53 ms / 5,000 ms
コード長	6,725 bytes
コンパイル時間	3,285 ms
コンパイル使用メモリ	242,720 KB
実行使用メモリ	18,292 KB
最終ジャッジ日時	2024-12-21 14:42:09
合計ジャッジ時間	5,155 ms
ジャッジサーバーID （参考情報）	judge4 / judge1

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	2 ms 5,248 KB
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	AC	2 ms 5,248 KB
testcase_06	AC	2 ms 5,248 KB
testcase_07	AC	2 ms 5,248 KB
testcase_08	AC	2 ms 5,248 KB
testcase_09	AC	2 ms 5,248 KB
testcase_10	AC	2 ms 5,248 KB
testcase_11	AC	2 ms 5,248 KB
testcase_12	AC	2 ms 5,248 KB
testcase_13	AC	3 ms 5,248 KB
testcase_14	AC	3 ms 5,248 KB
testcase_15	AC	3 ms 5,248 KB
testcase_16	AC	4 ms 5,248 KB
testcase_17	AC	4 ms 5,248 KB
testcase_18	AC	5 ms 5,248 KB
testcase_19	AC	2 ms 5,248 KB
testcase_20	AC	2 ms 5,248 KB
testcase_21	AC	2 ms 5,248 KB
testcase_22	AC	2 ms 5,248 KB
testcase_23	AC	2 ms 5,248 KB
testcase_24	AC	12 ms 6,376 KB
testcase_25	AC	4 ms 5,248 KB
testcase_26	AC	3 ms 5,248 KB
testcase_27	AC	6 ms 5,248 KB
testcase_28	AC	51 ms 18,276 KB
testcase_29	AC	6 ms 5,248 KB
testcase_30	AC	6 ms 5,248 KB
testcase_31	AC	6 ms 5,248 KB
testcase_32	AC	6 ms 5,248 KB
testcase_33	AC	50 ms 18,292 KB
testcase_34	AC	47 ms 18,252 KB
testcase_35	AC	53 ms 18,148 KB
testcase_36	AC	53 ms 18,140 KB
testcase_37	AC	51 ms 18,200 KB
testcase_38	AC	50 ms 17,924 KB

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ソースコード

raw source code

/**
 *    author:  otera
 *    created: 17.11.2021 03:10:52 
**/
#include<bits/stdc++.h>
#include<atcoder/maxflow>
#include<atcoder/scc>
using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using uint = unsigned;
#define repa(i, n) for(int i = 0; i < n; ++ i)
#define repb(i, a, b) for(int i = a; i < b; ++ i)
#define repc(i, a, b, c) for(int i = a; i < b; i += c)
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, repc, repb, repa)(__VA_ARGS__)
#define rep1a(i, n) for(int i = 0; i <= n; ++ i)
#define rep1b(i, a, b) for(int i = a; i <= b; ++ i)
#define rep1c(i, a, b, c) for(int i = a; i <= b; i += c)
#define rep1(...) overload4(__VA_ARGS__, rep1c, rep1b, rep1a)(__VA_ARGS__)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define per1(i,n) for(int i=n;i>=1;i--)
typedef pair<int, int> P;
typedef pair<ll, ll> LP;
#define pb push_back
#define eb emplace_back
#define fr first
#define sc second
#define all(c) c.begin(),c.end()
#define lb(c, x) distance((c).begin(), lower_bound(all(c), (x)))
#define ub(c, x) distance((c).begin(), upper_bound(all(c), (x)))
#define Sort(a) sort(all(a))
#define Rev(a) reverse(all(a))
#define Uniq(a) sort(all(a));a.erase(unique(all(a)),end(a))
#define si(c) (int)(c).size()
inline ll popcnt(ull a){ return __builtin_popcountll(a); }
#define tpow(n) (1LL<<(n))
#define unless(A) if(!(A))
ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }
ll intpow(ll a, ll b, ll m) {ll ans = 1; while(b){ if(b & 1) (ans *= a) %= m; (a *= a) %= m; b /= 2; } return ans; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)
#define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__)
#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)
#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)
#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)
#define LD(...) ld __VA_ARGS__;in(__VA_ARGS__)
#define vec(type,name,...) vector<type>name(__VA_ARGS__)
#define VEC(type,name,size) vector<type>name(size);in(name)
#define vv(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))
#define VV(type,name,h,w) vector<vector<type>>name(h,vector<type>(w));in(name)
#define vvv(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))
template <class T> using vc = vector<T>;
template <class T> using vvc = vector<vc<T>>;
template <class T> using vvvc = vector<vvc<T>>;
template <class T> using vvvvc = vector<vvvc<T>>;
template <class T> using pq = priority_queue<T>;
template <class T> using pqg = priority_queue<T, vector<T>, greater<T>>;
template<class T> void scan(T& a){ cin >> a; }
template<class T> void scan(vector<T>& a){ for(auto&& i : a) scan(i); }
void in(){}
template <class Head, class... Tail> void in(Head& head, Tail&... tail){ scan(head); in(tail...); }
void print(){ cout << ' '; }
template<class T> void print(const T& a){ cout << a; }
template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ cout << ' '; print(*i); } }
int out(){ cout << '\n'; return 0; }
template<class T> int out(const T& t){ print(t); cout << '\n'; return 0; }
template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); cout << ' '; out(tail...); return 0; }
#define CHOOSE(a) CHOOSE2 a
#define CHOOSE2(a0,a1,a2,a3,a4,x,...) x
#define debug_1(x1) cout<<#x1<<": "<<x1<<endl
#define debug_2(x1,x2) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<endl
#define debug_3(x1,x2,x3) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<endl
#define debug_4(x1,x2,x3,x4) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<endl
#define debug_5(x1,x2,x3,x4,x5) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<", "#x5<<": "<<x5<<endl
#ifdef DEBUG
#define debug(...) CHOOSE((__VA_ARGS__,debug_5,debug_4,debug_3,debug_2,debug_1,~))(__VA_ARGS__)
#define dump(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); }
#else
#define debug(...)
#define dump(...)
#endif

#define int long long

int n, m;

void calc(vvc<int> g, vc<int> check, vc<int>& can) {
    queue<int> que;
    assert(si(check) == si(can));
    rep(i, n + m) {
        if(!check[i]) {
            que.push(i);
            can[i] = 1;
        }
    }
    while(que.size()) {
        int v = que.front(); que.pop();
        for(int nv: g[v]) {
            if(!can[nv]) {
                can[nv] = 1;
                que.push(nv);
            }
        }
    }
}

void solve() {
    in(n, m);
    INT(l);
    vc<int> a(l), b(l);
    vvc<int> g(n + m), rg(n + m);
    rep(i, l) {
        in(a[i], b[i]);
        -- a[i], -- b[i];
        g[a[i]].eb(b[i] + n);
        rg[b[i] + n].eb(a[i]);
    }
    atcoder::mf_graph<int> mfg(n + m + 2);
    int s = n + m, t = n + m + 1;
    rep(i, n) {
        mfg.add_edge(s, i, 1);
    }
    rep(j, m) {
        mfg.add_edge(j + n, t, 1);
    }   
    rep(i, l) {
        mfg.add_edge(a[i], b[i] + n, 1);
    }
    mfg.flow(s, t);
    atcoder::scc_graph sccg(n + m);
    rep(i, l) {
        sccg.add_edge(a[i], b[i] + n);
    }
    auto edges = mfg.edges();
    vc<int> matched(n + m);
    for(auto e: edges) {
        if(e.from == s || e.to == t || e.flow == 0) continue;
        int x = e.from, y = e.to;
        sccg.add_edge(y, x);
        matched[x] = matched[y] = 1;
        g[y].eb(x);
        rg[x].eb(y);
    }
    vc<int> can_reach_from_unmatched(n + m);
    vc<int> can_reach_to_unmatched(n + m);
    calc(g, matched, can_reach_from_unmatched);
    calc(rg, matched, can_reach_to_unmatched);
    rep(i, n + m) {
        if(!matched[i]) {
            can_reach_from_unmatched[i] = can_reach_to_unmatched[i] = 1;
        }
    }
    
    auto li = sccg.scc();
    vc<int> num(n + m);
    int now = 0;
    vc<int> sz(si(li));
    for(auto vs: li) {
        sz[now] = si(vs);
        for(int v: vs) {
            num[v] = now;
        } 
        ++ now;
    }
    rep(i, l) {
        if(can_reach_to_unmatched[a[i]]) {
            out("Yes");
        } else if(can_reach_from_unmatched[a[i]]) {
            out("Yes");
        } else if(num[a[i]] != num[b[i] + n]) {
            out("Yes");
        } else {
            if(sz[num[a[i]]] == 2) out("No");
            else out("Yes");
        }
    }
} 

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    // cout << fixed << setprecision(20);
    // INT(t); rep(i, t)solve();
    solve();
    return 0;
}

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結果

テストケース

ソースコード