oj.uz

Submission #969438

# Submission time Handle Problem Language Result Execution time Memory
969438 2024-04-25T07:06:15 Z vjudge1 Cities (BOI16_cities) C++17
0 / 100
 4 ms 5212 KB 
#include<iostream>
#include<vector>
using namespace std;

int parent[100007];
int ans;
int u,v;
vector<int> vec[100007];
void dfs(int x,int ori)
{
    // cout << x << ' ';
    for(auto i:vec[x]){
        if(i==ori) continue;
        dfs(i,x);
    }
    if(parent[x]==x){
        ans+=2;
        if(ori) swap(parent[x],parent[ori]);
        else {
            swap(parent[x],parent[vec[x][0]]);
            // cout << x <<  ' ' << vec[x][0];
        }
    }
}
int main()
{
    int n; cin >> n;
    for(int i=1;i<n;++i){
        cin >> u >> v;
        vec[u].push_back(v);
        vec[v].push_back(u);
    }
    for(int i=1;i<=n;++i) parent[i]=i;
    dfs(1,0);
    // cout << '\n';
    cout << ans << endl;
    for(int i=1;i<=n;i++) cout << parent[i] << " ";
}

/*
5
1 2
2 3
3 4
4 5
*/

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 4 ms 5212 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 5212 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 5208 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 5212 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -