#870145 (C++17) No.2301 Namorientation

提出ソース

結果

問題	No.2301 Namorientation
ユーザー	siganai
提出日時	2023-05-19 08:04:26
言語	C++17 (gcc 13.2.0 + boost 1.83.0)
結果	AC
実行時間	170 ms / 3,000 ms
コード長	6,838 bytes
コンパイル時間	2,276 ms
コンパイル使用メモリ	211,500 KB
実行使用メモリ	20,360 KB
最終ジャッジ日時	2023-08-22 17:12:27
合計ジャッジ時間	16,603 ms
ジャッジサーバーID （参考情報）	judge14 / judge13

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 4,380 KB
testcase_01	AC	2 ms 4,380 KB
testcase_02	AC	2 ms 4,376 KB
testcase_03	AC	2 ms 4,380 KB
testcase_04	AC	2 ms 4,380 KB
testcase_05	AC	1 ms 4,380 KB
testcase_06	AC	1 ms 4,376 KB
testcase_07	AC	2 ms 4,376 KB
testcase_08	AC	2 ms 4,376 KB
testcase_09	AC	2 ms 4,380 KB
testcase_10	AC	2 ms 4,380 KB
testcase_11	AC	1 ms 4,380 KB
testcase_12	AC	79 ms 12,608 KB
testcase_13	AC	73 ms 11,676 KB
testcase_14	AC	167 ms 18,876 KB
testcase_15	AC	93 ms 13,656 KB
testcase_16	AC	135 ms 16,736 KB
testcase_17	AC	85 ms 12,940 KB
testcase_18	AC	140 ms 17,084 KB
testcase_19	AC	68 ms 11,328 KB
testcase_20	AC	137 ms 16,940 KB
testcase_21	AC	93 ms 13,544 KB
testcase_22	AC	69 ms 16,484 KB
testcase_23	AC	67 ms 16,108 KB
testcase_24	AC	57 ms 14,068 KB
testcase_25	AC	48 ms 17,608 KB
testcase_26	AC	61 ms 20,360 KB
testcase_27	AC	166 ms 18,956 KB
testcase_28	AC	168 ms 19,008 KB
testcase_29	AC	170 ms 19,076 KB
testcase_30	AC	162 ms 18,964 KB
testcase_31	AC	168 ms 18,900 KB

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ソースコード

raw source code

#line 1 "main.cpp"
//#pragma GCC target("avx")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>

#ifdef LOCAL
#include <debug.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pii = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vpii = vector<pii>;
using vpll = vector<pll>;
using vs = vector<string>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
#define overload4(_1, _2, _3, _4, name, ...) name
#define overload3(a,b,c,name,...) name
#define rep1(n) for (ll UNUSED_NUMBER = 0; UNUSED_NUMBER < (n); ++UNUSED_NUMBER)
#define rep2(i, n) for (ll i = 0; i < (n); ++i)
#define rep3(i, a, b) for (ll i = (a); i < (b); ++i)
#define rep4(i, a, b, c) for (ll i = (a); i < (b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep1(n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep2(i,n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep3(i,a,b) for(ll i = (b) - 1;i >= (a);i--)
#define rrep4(i,a,b,c) for(ll i = (a) + ((b)-(a)-1) / (c) * (c);i >= (a);i -= c)
#define rrep(...) overload4(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define all1(i) begin(i) , end(i)
#define all2(i,a) begin(i) , begin(i) + a
#define all3(i,a,b) begin(i) + a , begin(i) + b
#define all(...) overload3(__VA_ARGS__, all3, all2, all1)(__VA_ARGS__)
#define sum(...) accumulate(all(__VA_ARGS__),0LL)
template<class T> bool chmin(T &a, const T &b){ if(a > b){ a = b; return 1; } else return 0; }
template<class T> bool chmax(T &a, const T &b){ if(a < b){ a = b; return 1; } else return 0; }
template<class T> auto min(const T& a){ return *min_element(all(a)); }
template<class T> auto max(const T& a){ return *max_element(all(a)); }
template<class... Ts> void in(Ts&... t);
#define INT(...) int __VA_ARGS__; in(__VA_ARGS__)
#define LL(...) ll __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, size) vector<type> name(size); in(name)
#define VV(type, name, h, w) vector<vector<type>> name(h, vector<type>(w)); in(name)
ll intpow(ll a, ll b){ ll ans = 1; while(b){if(b & 1) ans *= a; a *= a; b /= 2;} return ans;}
ll modpow(ll a, ll b, ll p){ ll ans = 1; a %= p;if(a < 0) a += p;while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
ll GCD(ll a,ll b) { if(a == 0 || b == 0) return 0; if(a % b == 0) return b; else return GCD(b,a%b);}
ll LCM(ll a,ll b) { if(a == 0) return b; if(b == 0) return a;return a / GCD(a,b) * b;}
namespace IO{
#define VOID(a) decltype(void(a))
struct setting{ setting(){cin.tie(nullptr); ios::sync_with_stdio(false);fixed(cout); cout.precision(12);}} setting;
template<int I> struct P : P<I-1>{};
template<> struct P<0>{};
template<class T> void i(T& t){ i(t, P<3>{}); }
void i(vector<bool>::reference t, P<3>){ int a; i(a); t = a; }
template<class T> auto i(T& t, P<2>) -> VOID(cin >> t){ cin >> t; }
template<class T> auto i(T& t, P<1>) -> VOID(begin(t)){ for(auto&& x : t) i(x); }
template<class T, size_t... idx> void ituple(T& t, index_sequence<idx...>){
    in(get<idx>(t)...);}
template<class T> auto i(T& t, P<0>) -> VOID(tuple_size<T>{}){
    ituple(t, make_index_sequence<tuple_size<T>::value>{});}
#undef VOID
}
#define unpack(a) (void)initializer_list<int>{(a, 0)...}
template<class... Ts> void in(Ts&... t){ unpack(IO :: i(t)); }
#undef unpack
static const double PI = 3.1415926535897932;
template <class F> struct REC {
    F f;
    REC(F &&f_) : f(forward<F>(f_)) {}
    template <class... Args> auto operator()(Args &&...args) const { return f(*this, forward<Args>(args)...); }};
constexpr int mod = 1000000007;
//constexpr int mod = 998244353;
#line 2 "library/graph/graph-template.hpp"
template <typename T> 
struct Edge {
	int from, to;
	T cost;
	Edge() = default;
	Edge(int _to, T _cost) : from(-1), to(_to), cost(_cost) {}
	Edge(int _from, int _to, T _cost) : from(_from), to(_to), cost(_cost) {}
	bool operator < (const Edge &a) const { return cost < a.cost; }
	bool operator > (const Edge &a) const { return cost > a.cost; }
    Edge &operator = (const int &x) {
        to = x;
        return *this;
    }
    operator int() const { return to; }
    friend ostream operator<<(ostream &os, Edge &edge) { return os << edge.to; }
};
 
template <typename T>
using Edges = vector<Edge<T>>;
template <typename T>
using Wgraph = vector<Edges<T>>;
using Ugraph = vector<vector<int>>;
Ugraph uinput(int N, int M = -1, bool is_directed = false, int origin = 1) {
    Ugraph g(N);
    if (M == -1) M = N - 1;
    while(M--) {
        int a,b;
        cin >> a >> b;
        a -= origin, b -= origin;
        g[a].push_back(b);
        if(!is_directed) g[b].push_back(a);
    }
    return g;
}
template <typename T>
Wgraph<T> winput(int N, int M = -1, bool is_directed = false,int origin = 1) {
    Wgraph<T> g(N);
    if (M == -1) M = N - 1;
    while(M--) {
        int a,b;
        T c;
        cin >> a >> b >> c;
        a -= origin, b -= origin;
        g[a].emplace_back(b,c);
        if(!is_directed) g[b].emplace_back(a,c);
    }
    return g;
}
#line 87 "main.cpp"
int main() {
    INT(n);
    Wgraph<int> g(n);
    vi V(n);
    rep(i,n) {
        INT(a,b);
        a--,b--;
        g[a].emplace_back(b,i);
        g[b].emplace_back(a,~i);
        V[a]++;
        V[b]++;
    }
    vi st;
    vi used(n);
    vi ans(n);
    rep(i,n) if(V[i] == 1) st.emplace_back(i);
    while(!st.empty()) {
        int now = st.back();
        st.pop_back();
        used[now] = 1;
        for(auto &nex:g[now]) {
            if(V[nex] > 1) {
                V[nex]--;
                if(nex.cost < 0) ans[~nex.cost] = 1;
                if(V[nex] == 1) st.emplace_back(nex);
            }
        }
    }
    rep(i,n) {
        if(!used[i]) {
            int now = i;
            V[now] = 1;
            while(!used[now]) {
                used[now] = 1;
                for(auto &nex:g[now]) {
                    if(V[nex] == 2) {
                        if(nex.cost < 0) ans[~nex.cost] = 1;
                        V[nex]--;
                        now = nex;
                        break;
                    }
                }
            }
            for(auto &nex:g[now]) {
                if(nex == i) {
                    if(nex.cost < 0) ans[~nex.cost] = 1;
                }
            }
        }
    }
    rep(i,n) {
        cout << (ans[i] ? "<-" : "->") << '\n';
    }
}

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結果

テストケース

ソースコード