結果

問題 No.2598 Kadomatsu on Tree
ユーザー 👑 AngrySadEightAngrySadEight
提出日時 2023-12-19 17:21:01
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,834 bytes
コンパイル時間 6,459 ms
コンパイル使用メモリ 225,200 KB
実行使用メモリ 35,148 KB
最終ジャッジ日時 2024-09-27 17:13:20
合計ジャッジ時間 23,437 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
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 2 ms
6,816 KB
testcase_01 AC 2 ms
6,812 KB
testcase_02 AC 2 ms
6,940 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 2 ms
6,940 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,944 KB
testcase_07 AC 2 ms
6,944 KB
testcase_08 AC 2 ms
6,944 KB
testcase_09 AC 2 ms
6,940 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,944 KB
testcase_12 AC 2 ms
6,944 KB
testcase_13 AC 7 ms
6,944 KB
testcase_14 AC 8 ms
6,940 KB
testcase_15 AC 6 ms
6,940 KB
testcase_16 AC 7 ms
6,944 KB
testcase_17 AC 5 ms
6,940 KB
testcase_18 AC 7 ms
6,940 KB
testcase_19 AC 8 ms
6,944 KB
testcase_20 AC 5 ms
6,940 KB
testcase_21 AC 5 ms
6,940 KB
testcase_22 AC 6 ms
6,944 KB
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
testcase_32 WA -
testcase_33 WA -
testcase_34 WA -
testcase_35 WA -
testcase_36 WA -
testcase_37 WA -
testcase_38 WA -
testcase_39 WA -
testcase_40 WA -
testcase_41 WA -
testcase_42 WA -
testcase_43 WA -
testcase_44 WA -
testcase_45 WA -
testcase_46 WA -
testcase_47 WA -
testcase_48 WA -
testcase_49 WA -
testcase_50 WA -
testcase_51 WA -
testcase_52 WA -
testcase_53 WA -
testcase_54 WA -
testcase_55 AC 35 ms
6,940 KB
testcase_56 WA -
testcase_57 AC 58 ms
8,228 KB
testcase_58 AC 330 ms
22,504 KB
testcase_59 AC 327 ms
22,768 KB
testcase_60 WA -
testcase_61 WA -
testcase_62 WA -
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 #

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
#include <atcoder/all>
#include <bitset>
#include <cassert>
#include <cmath>
#include <ctime>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int, int>
#define pil pair<int, ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int, int>>
#define vpll vector<pair<ll, ll>>
#define vvpii vector<vector<pair<int, int>>>
#define vvpll vector<vector<pair<ll, ll>>>

using mint = modint998244353;

template <typename T>
void debug(T e) {
    cerr << e << endl;
}

template <typename T>
void debug(vector<T> &v) {
    rep(i, v.size()) { cerr << v[i] << " "; }
    cerr << endl;
}

template <typename T>
void debug(vector<vector<T>> &v) {
    rep(i, v.size()) {
        rep(j, v[i].size()) { cerr << v[i][j] << " "; }
        cerr << endl;
    }
}

template <typename T>
void debug(vector<pair<T, T>> &v) {
    rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; }
}

template <typename T>
void debug(set<T> &st) {
    for (auto itr = st.begin(); itr != st.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(multiset<T> &ms) {
    for (auto itr = ms.begin(); itr != ms.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(map<T, T> &mp) {
    for (auto itr = mp.begin(); itr != mp.end(); itr++) {
        cerr << itr->first << " " << itr->second << endl;
    }
}

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << H << " ";
    debug_out(T...);
}

void dfs(vector<vector<ll>> &graph, vector<bool> &isvisited, vector<ll> &prev,
         vector<ll> &dp, ll v) {
    isvisited[v] = true;
    ll dp_val = 1;
    for (ll i = 0; i < graph[v].size(); i++) {
        if (isvisited[graph[v][i]]) {
            continue;
        }
        prev[graph[v][i]] = v;
        dfs(graph, isvisited, prev, dp, graph[v][i]);
        dp_val += dp[graph[v][i]];
    }
    dp[v] = dp_val;
}

int main() {
    ll N;
    cin >> N;
    vector<ll> U(N - 1);
    vector<ll> V(N - 1);
    for (ll i = 0; i < N - 1; i++) {
        cin >> U[i] >> V[i];
        U[i]--;
        V[i]--;
    }
    vector<vector<ll>> graph(N, vector<ll>(0));
    for (ll i = 0; i < N - 1; i++) {
        graph[U[i]].push_back(V[i]);
        graph[V[i]].push_back(U[i]);
    }
    vector<ll> A(N);
    for (ll i = 0; i < N; i++) {
        cin >> A[i];
    }
    // 根つき木を適当にとり,部分木のサイズを求める
    vector<ll> dp(N, 0);
    vector<bool> isvisited(N, false);
    vector<ll> prev(N, -1);
    dfs(graph, isvisited, prev, dp, 0);

    ll ans = 0;
    for (ll i = 0; i < N; i++) {
        ll plus = 0;
        ll minus = 0;

        ll rem = N - 1;
        for (ll j = 0; j < graph[i].size(); j++) {
            if (prev[i] != graph[i][j]) {
                rem -= dp[graph[i][j]];
            }
        }
        for (ll j = 0; j < graph[i].size(); j++) {
            ll subsize = dp[graph[i][j]];
            if (prev[i] == graph[i][j]) {
                subsize = rem;
            }
            if (A[i] < A[graph[i][j]]) {
                plus += subsize;
            }
            if (A[i] > A[graph[i][j]]) {
                minus += subsize;
            }
        }
        for (ll j = 0; j < graph[i].size(); j++) {
            ll subsize = dp[graph[i][j]];
            if (prev[i] == graph[i][j]) {
                subsize = rem;
            }
            if (A[i] < A[graph[i][j]]) {
                ans += subsize * (plus - subsize);
                plus -= subsize;
            }
            if (A[i] > A[graph[i][j]]) {
                ans += subsize * (minus - subsize);
                minus -= subsize;
            }
        }
        // debug_out(i, plus, minus, ans);
    }
    cout << ans << endl;
}
0