Submission #721006

#	Time	Username	Problem	Language	Result	Execution time	Memory
721006		Pring	Unique Cities (JOI19_ho_t5)	C++14	4 / 100	787 ms	274432 KiB

joi2019_ho_t5

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define endl '\n'
typedef pair<int, int> pii;

const int MXN = 2005;
int n, m, dis[MXN][MXN], color[MXN];
vector<int> edge[MXN];

void DFS(int root, int id, int parent, int depth) {
    dis[root][id] = depth;
    for (auto &i : edge[id]) {
        if (i == parent) continue;
        DFS(root, i, id, depth + 1);
    }
}

int solve(int id) {
    int ans = 0;
    bitset<MXN> b;
    vector<int> v(n, -1);
    for (int i = 0; i < n; i++) {
        if (i == id) continue;
        int &x = v[dis[id][i]];
        if (x == -2) continue;
        if (x == -1) x = i;
        else {
            x = -2;
        }
    }
    for (int i = 0; i < n; i++) {
        if (v[i] >= 0) {
            b[color[v[i]]] = true;
        }
    }
    return b.count();
}

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int x, y;
    cin >> n >> m;
    for (int i = 1; i < n; i++) {
        cin >> x >> y;
        edge[--x].push_back(--y);
        edge[y].push_back(x);
    }
    for (int i = 0; i < n; i++) {
        cin >> color[i];
        DFS(i, i, -1, 0);
    }
    for (int i = 0; i < n; i++) cout << solve(i) << endl;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t5.cpp: In function 'long long int solve(long long int)':
joi2019_ho_t5.cpp:21:9: warning: unused variable 'ans' [-Wunused-variable]
   21 |     int ans = 0;
      |         ^~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 32
• Subtask 3: 0 / 32
• Subtask 4: 0 / 32