結果

問題 No.1023 Cyclic Tour
ユーザー kcvlexkcvlex
提出日時 2020-04-10 23:01:54
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 5,844 bytes
コンパイル時間 1,609 ms
コンパイル使用メモリ 139,660 KB
実行使用メモリ 26,644 KB
最終ジャッジ日時 2024-09-15 23:39:32
合計ジャッジ時間 14,277 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
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
5,376 KB
testcase_02 WA -
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 131 ms
17,152 KB
testcase_05 AC 131 ms
17,152 KB
testcase_06 AC 146 ms
18,944 KB
testcase_07 AC 134 ms
17,920 KB
testcase_08 AC 117 ms
15,616 KB
testcase_09 AC 114 ms
15,360 KB
testcase_10 AC 104 ms
15,104 KB
testcase_11 AC 125 ms
16,128 KB
testcase_12 AC 119 ms
15,232 KB
testcase_13 AC 113 ms
14,464 KB
testcase_14 WA -
testcase_15 AC 124 ms
14,848 KB
testcase_16 AC 254 ms
22,912 KB
testcase_17 AC 247 ms
23,424 KB
testcase_18 AC 259 ms
23,808 KB
testcase_19 AC 238 ms
23,040 KB
testcase_20 AC 288 ms
25,856 KB
testcase_21 AC 295 ms
26,112 KB
testcase_22 AC 273 ms
24,832 KB
testcase_23 AC 275 ms
25,216 KB
testcase_24 AC 274 ms
24,704 KB
testcase_25 WA -
testcase_26 WA -
testcase_27 AC 258 ms
25,216 KB
testcase_28 AC 253 ms
24,320 KB
testcase_29 AC 229 ms
23,296 KB
testcase_30 AC 260 ms
24,960 KB
testcase_31 AC 236 ms
24,064 KB
testcase_32 AC 251 ms
24,704 KB
testcase_33 WA -
testcase_34 AC 264 ms
24,576 KB
testcase_35 AC 280 ms
25,984 KB
testcase_36 AC 274 ms
25,472 KB
testcase_37 AC 243 ms
24,960 KB
testcase_38 AC 227 ms
23,424 KB
testcase_39 AC 261 ms
24,704 KB
testcase_40 AC 256 ms
24,576 KB
testcase_41 AC 246 ms
24,576 KB
testcase_42 WA -
testcase_43 WA -
testcase_44 WA -
testcase_45 AC 123 ms
19,712 KB
testcase_46 AC 119 ms
19,712 KB
testcase_47 AC 128 ms
21,248 KB
testcase_48 AC 262 ms
26,596 KB
testcase_49 AC 249 ms
25,352 KB
testcase_50 AC 264 ms
26,640 KB
testcase_51 AC 263 ms
26,632 KB
testcase_52 AC 264 ms
26,644 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 <limits>
#include <initializer_list>
#include <utility>
#include <bitset>
#include <tuple>
#include <type_traits>
#include <functional>
#include <string>
#include <array>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <iterator>
#include <algorithm>
#include <complex>
#include <random>
#include <numeric>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <regex>
#include <cassert>
#include <cstddef>
#define endl codeforces
#define ALL(v) std::begin(v), std::end(v)
#define ALLR(v) std::rbegin(v), std::rend(v)
using ll = std::int64_t;
using ull = std::uint64_t;
using pii = std::pair<int, int>;
using tii = std::tuple<int, int, int>;
using pll = std::pair<ll, ll>;
using tll = std::tuple<ll, ll, ll>;
template <typename T> using vec = std::vector<T>;
template <typename T> using vvec = vec<vec<T>>;
template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }
template <typename T> const T& clamp(const T &t, const T &low, const T &high) { return std::max(low, std::min(high, t)); }
template <typename T> void chclamp(T &t, const T &low, const T &high) { return t = clamp(t, low, high); }
template <typename T> T make_v(T init) { return init; }
template <typename T, typename... Tail> auto make_v(T init, std::size_t s, Tail... tail) { auto v = std::move(make_v(init, tail...)); return vec<decltype(v)>(s, v); }
template <typename T, std::size_t Head, std::size_t ...Tail> struct multi_dem_array { using type = std::array<typename multi_dem_array<T, Tail...>::type, Head>; };
template <typename T, std::size_t Head> struct multi_dem_array<T, Head> { using type = std::array<T, Head>; };
template <typename T, std::size_t ...Args> using mdarray = typename multi_dem_array<T, Args...>::type;
namespace init__ { struct InitIO { InitIO() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << std::fixed << std::setprecision(30); } } init_io; }

namespace graph {

using Node = ll;
using Weight = ll;
using Edge = std::pair<Node, Weight>;

template <bool Directed>
struct Graph : public vvec<Edge> {
    using vvec<Edge>::vvec;

    void add_edge(Node f, Node t, Weight w = 1) {
        (*this)[f].emplace_back(t, w);
        if (!Directed) (*this)[t].emplace_back(f, w);
    }

    Graph<Directed> build_inv() const {
        Graph<Directed> ret(this->size());
        for (Node i = 0; i < this->size(); i++) {
            for (const Edge &e : (*this)[i]) {
                Node j;
                Weight w;
                std::tie(j, w) = e;
                if (!Directed && j < i) continue;
                ret.add_edge(j, i, w);
            }
        }

        return ret;
    }
};

template <typename Iterator>
class dst_iterator {
    Iterator ite;

public:
    dst_iterator(Iterator ite) : ite(ite) { }

    bool operator ==(const dst_iterator<Iterator> &oth) const {
        return ite == oth.ite;
    }

    bool operator !=(const dst_iterator<Iterator> &oth) const {
        return !(*this == oth);
    }

    bool operator <(const dst_iterator<Iterator> &oth) const {
        return ite < oth.ite;
    }

    bool operator >(const dst_iterator<Iterator> &oth) const {
        return ite > oth.ite;
    }

    bool operator <=(const dst_iterator<Iterator> &oth) const {
        return ite <= oth.ite;
    }

    bool operator >=(const dst_iterator<Iterator> &oth) const {
        return ite >= oth.ite;
    }

    const Node& operator *() {
        return ite->first;
    }

    const Node& operator *() const {
        return ite->first;
    }

    dst_iterator operator ++() {
        ++ite;
        return ite;
    }
};

class dst_iteration {
    using ite_type = vec<Edge>::const_iterator;
    const vec<Edge> &edges;

public:
    dst_iteration(const vec<Edge> &edges) : edges(edges) { }

    auto begin() const {
        return dst_iterator<ite_type>(edges.cbegin());
    }

    auto end() const {
        return dst_iterator<ite_type>(edges.cend());
    }
};

dst_iteration dst(const vec<Edge> &edges) {
    return dst_iteration(edges);
}

}

struct Solver {
    ll n, m;
    graph::Graph<true> g;
    vec<ll> label;
    std::map<pll, ll> st;

    Solver(ll n, ll m) : n(n), m(m), g(n), label(n) {
        std::map<pll, ll> st;
        while (m--) {
            ll a, b, c;
            std::cin >> a >> b >> c;
            a--; b--;
            g.add_edge(a, b);
            if (c == 1) g.add_edge(b, a);
            if (a > b) std::swap(a, b);
            st[pll(a, b)]++;
        }
    }

    bool dfs(ll cur, ll pre, ll l) {
        label[cur] = l;
        for (ll nxt : graph::dst(g[cur])) if (nxt != pre) {
            if (label[nxt] == l) return true;
            if (label[nxt]) continue;
            if (dfs(nxt, cur, l)) return true;
        }
        label[cur] = -l;
        return false;
    }

    bool solve() {
        for (auto &&e : st) if (2 <= e.second) return true;
        for (ll i = 0; i < n; i++) if (!label[i]) {
            bool res = dfs(i, -1, i + 1);
            if (res) return true;
        }
        return false;
    }
};

int main() {
    ll n, m;
    std::cin >> n >> m;
    Solver solver(n, m);
    std::cout << (solver.solve() ? "Yes" : "No") << '\n';
    return 0;
}
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