oj.uz

Submission #567856

# Submission time Handle Problem Language Result Execution time Memory
567856 2022-05-24T09:31:04 Z stevancv Village (BOI20_village) C++14
0 / 100
 2 ms 2644 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
using namespace std;
const int N = 1e5 + 2;
const ll mod = 1e9 + 7;
vector<int> adj[N];
int ans[N], sol;
void Dfs(int s, int e) {
    for (auto u : adj[s]) {
        if (u == e) continue;
        Dfs(u, s);
        if (ans[u] == u) {
            swap(ans[u], ans[s]);
            sol += 2;
        }
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin >> n;
    for (int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for (int i = 1; i <= n; i++) ans[i] = i;
    Dfs(1, 0);
    if (ans[1] == 1) {
        swap(ans[1], ans[adj[1][0]]);
        sol += 2;
    }
    cout << sol << en;
    for (int i = 1; i <= n; i++) cout << ans[i] << sp;
    cout << en;
    return 0;

}

Subtask #1
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 38.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2644 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -