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Submission #318357

# Submission time Handle Problem Language Result Execution time Memory
318357 2020-11-01T12:18:50 Z georgerapeanu Pastiri (COI20_pastiri) C++11
0 / 100
 517 ms 38740 KB 
#include <bits/stdc++.h>

using namespace std;

const int NMAX = 500005;

int n,k;
vector<int> graph[NMAX + 5];
queue<int> q;

int dist[NMAX + 5];

int main(){

    scanf("%d %d",&n,&k);

    for(int i = 1;i < n;i++){
        int a,b;
        scanf("%d %d",&a,&b);
        graph[a].push_back(b);
        graph[b].push_back(a);
    }

    for(int i = 1;i <= k;i++){
        int nod;
        scanf("%d",&nod);
        q.push(nod);
        dist[nod] = 1;
    }

    vector<int> ans;

    while(q.empty() == false){
        int nod = q.front();
        q.pop();

        bool root = true;

        for(auto it:graph[nod]){
            if(dist[it] == 0){
                dist[it] = dist[nod] + 1;
                q.push(it);
                root = false;
            }
            else if(dist[it] == dist[nod] + 1){
                root = false;
            }
        }

        if(root){
            ans.push_back(nod);
        }
    }

    printf("%d\n",(int)ans.size());
    for(auto it:ans){
        printf("%d ",it);
    }

    return 0;
}

Compilation message

pastiri.cpp: In function 'int main()':
pastiri.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |     scanf("%d %d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~~
pastiri.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |         scanf("%d %d",&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~~
pastiri.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |         scanf("%d",&nod);
      |         ~~~~~^~~~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 192 ms 36324 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 12396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 12140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 51.0

# Verdict Execution time Memory Grader output
1 Incorrect 517 ms 38740 KB Output isn't correct
2 Halted 0 ms 0 KB -