QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#235959#5502. Dazzling MountainfroxyyWA 7ms75580kbC++202.2kb2023-11-03 14:10:092023-11-03 14:10:09

Judging History

你现在查看的是最新测评结果

  • [2023-11-03 14:10:09]
  • 评测
  • 测评结果:WA
  • 用时:7ms
  • 内存:75580kb
  • [2023-11-03 14:10:09]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define FOR(i, l, r) for(int i = (l); i <= (r); ++i)
#define REP(i, n) FOR(i, 0, (n) - 1)
#define rep(i, a, b) for(int i = a; i < (b); ++i)

#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define ssize(x) int(x.size())

#define pb push_back
#define fi first
#define se second
#define ld long double

typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef pair<ld, ld> pd;

using LL=long long;

#ifdef DEBUG
auto &operator<<(auto &o, pair<auto, auto> p) {
    return o << "()" << p.first << ", " << p.second <<")";
}
auto operator<<(auto &o, auto x)-> decltype(x.end(), o) {
    o << "{";int i = 0;
    for(auto e : x) o << ", "+!i++<<e;
    return o <<"}";
}
#define debug(x...) cerr << "["#x"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(x)
#else
#define debug(...) {}
#endif

const int MAXN = 1e6 + 7;
vector<int> G[MAXN];
int subtree[MAXN];
set<int> s[MAXN];

void init(int n) {
    for (int i = 1; i <= n; i++) {
        subtree[i] = 0;
        s[i].clear();

        if(!G[i].empty())
            G[i].clear();
    }
}

void DFS_subtree(int v, int p) {
    subtree[v] = 1;

    for (auto u : G[v]) {
        if (u != p) {
            DFS_subtree(u, v);
            subtree[v] += subtree[u];
        }
    }
}

void DFS(int v, int p) {
    bool ok = false;

    for (auto u : G[v]) {
        if (u == p) continue;


        DFS(u, v);

        if (!ok) {
            ok = true;
            s[v] = s[u];
        }
        else {
            for (auto i : s[v]) {
                if (s[u].find(i) == s[u].end()) {
                    s[v].erase(i);
                }
            }
        }
    }

    s[v].insert(subtree[v]);
}

void solve() {
    int n;
    cin >> n;

    init(n);

    for (int i = 0; i < n-1; i++) {
        int a, b;
        cin >> a >> b;
        G[a].pb(b);
        G[b].pb(a);
    }

    DFS_subtree(1, 1);

    DFS(1, 1);

    for (auto i : s[1]) {
        cout << i << ' ' ;
    }
    cout << '\n';
}


int main() {
    cin.tie(0)->sync_with_stdio(0);

    int z;
    cin >> z;
    while(z--) {
        solve();
    }
}

详细

Test #1:

score: 0
Wrong Answer
time: 7ms
memory: 75580kb

input:

1
9
1 2
2 3
3 4
3 5
2 6
6 7
7 8
7 9

output:

1 3 8 9 

result:

wrong answer 1st lines differ - expected: '4', found: '1 3 8 9 '