結果

問題 No.1207 グラフX
ユーザー sten_sansten_san
提出日時 2023-04-22 19:43:44
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 189 ms / 2,000 ms
コード長 3,559 bytes
コンパイル時間 2,522 ms
コンパイル使用メモリ 213,804 KB
実行使用メモリ 23,936 KB
最終ジャッジ日時 2024-04-24 22:24:36
合計ジャッジ時間 12,453 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
(要ログイン)

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 133 ms
17,352 KB
testcase_01 AC 157 ms
17,484 KB
testcase_02 AC 134 ms
17,380 KB
testcase_03 AC 127 ms
17,364 KB
testcase_04 AC 134 ms
17,492 KB
testcase_05 AC 185 ms
23,680 KB
testcase_06 AC 185 ms
23,936 KB
testcase_07 AC 189 ms
23,936 KB
testcase_08 AC 109 ms
11,428 KB
testcase_09 AC 115 ms
13,880 KB
testcase_10 AC 166 ms
20,352 KB
testcase_11 AC 175 ms
23,808 KB
testcase_12 AC 105 ms
12,360 KB
testcase_13 AC 63 ms
5,504 KB
testcase_14 AC 137 ms
16,740 KB
testcase_15 AC 114 ms
13,504 KB
testcase_16 AC 58 ms
6,144 KB
testcase_17 AC 92 ms
11,012 KB
testcase_18 AC 72 ms
11,180 KB
testcase_19 AC 89 ms
8,192 KB
testcase_20 AC 132 ms
17,024 KB
testcase_21 AC 11 ms
5,376 KB
testcase_22 AC 104 ms
11,008 KB
testcase_23 AC 101 ms
12,408 KB
testcase_24 AC 61 ms
10,316 KB
testcase_25 AC 141 ms
16,852 KB
testcase_26 AC 100 ms
13,336 KB
testcase_27 AC 147 ms
15,276 KB
testcase_28 AC 122 ms
13,940 KB
testcase_29 AC 121 ms
15,132 KB
testcase_30 AC 67 ms
7,808 KB
testcase_31 AC 55 ms
5,376 KB
testcase_32 AC 54 ms
8,444 KB
testcase_33 AC 59 ms
8,064 KB
testcase_34 AC 120 ms
13,364 KB
testcase_35 AC 12 ms
5,376 KB
testcase_36 AC 113 ms
13,928 KB
testcase_37 AC 103 ms
11,456 KB
testcase_38 AC 29 ms
5,376 KB
testcase_39 AC 64 ms
8,732 KB
testcase_40 AC 41 ms
5,376 KB
testcase_41 AC 77 ms
8,192 KB
testcase_42 AC 2 ms
5,376 KB
testcase_43 AC 1 ms
5,376 KB
testcase_44 AC 2 ms
5,376 KB
testcase_45 AC 126 ms
17,476 KB
testcase_46 AC 133 ms
17,220 KB
testcase_47 AC 127 ms
17,348 KB
testcase_48 AC 123 ms
17,348 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 <bits/stdc++.h>
using namespace std;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return vector(arg, init);
    else return vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename Container>
auto distance(const Container &c, decltype(begin(c)) iter) {
    return distance(begin(c), iter);
}

template <typename RIter, typename Compare = less<typename iterator_traits<RIter>::value_type>>
auto isort(RIter first, RIter last, Compare comp = Compare()) {
    vector<int> i(distance(first, last));
    iota(begin(i), end(i), 0);
    sort(begin(i), end(i), [&](auto x, auto y) {
        return comp(*(first + x), *(first + y));
    });
    return i;
}

template <typename, template <typename> typename, typename = void_t<>>
struct detect : false_type {};
template <typename T, template <typename> typename Check>
struct detect<T, Check, void_t<Check<T>>> : true_type {};
template <typename T, template <typename> typename Check>
constexpr inline bool detect_v = detect<T, Check>::value;

template <typename T>
using has_member_sort = decltype(declval<T>().sort());

template <typename Container, typename Compare = less<typename Container::value_type>>
auto sorted(Container c, Compare comp = Compare()) {
    if constexpr (detect_v<Container, has_member_sort>) {
        c.sort(comp);
        return c;
    }
    else {
        sort(begin(c), end(c), comp);
        return c;
    }
}

template <typename Container, typename Compare = equal_to<typename Container::value_type>>
auto uniqued(Container c, Compare comp = Compare()) {
    c.erase(unique(begin(c), end(c), comp), end(c));
    return c;
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

template <typename F>
constexpr auto fix(F &&f) noexcept {
    return [f = std::tuple<F>(std::forward<F>(f))](auto &&...args) mutable {
        return std::get<0>(f)(fix(std::get<0>(f)), std::forward<decltype(args)>(args)...);
    };
}

#include <atcoder/dsu>
#include <atcoder/modint>
using mint = atcoder::modint1000000007;

int main() {
    int n, m, x; cin >> n >> m >> x;

    atcoder::dsu dsu(n);

    auto g = vec<array<int, 2>>(uns, n, 0);
    for (int i = 0; i < m; ++i) {
        int x, y, z; cin >> x >> y >> z; --x; --y;

        if (!dsu.same(x, y)) {
            g[x].push_back({ y, z });
            g[y].push_back({ x, z });
            dsu.merge(x, y);
        }
    }

    auto sub = vec<int>(uns, n);
    fix([&](auto f, int v, int p = -1) -> int {
        sub[v] = 1;
        for (auto [u, _] : g[v]) {
            if (u == p) {
                continue;
            }
            sub[v] += f(u, v);
        }
        return sub[v];
    })(0);

    mint ans = 0;

    fix([&](auto f, int v, int p = -1, int z = -1) -> void {
        if (0 <= p) {
            ans += mint(x).pow(z) * sub[v] * (n - sub[v]);
        }

        for (auto [u, w] : g[v]) {
            if (u == p) {
                continue;
            }
            f(u, v, w);
        }
    })(0);

    cout << ans.val() << endl;
}

0