oj.uz

Submission #692453

# Submission time Handle Problem Language Result Execution time Memory
692453 2023-02-01T12:57:32 Z MateiKing80 Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 21 ms 476 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;
vector<int>v[513];
vector<int>ord;

void dfs (int nod, int tata)
{
    ord.push_back(nod);
    for (int i=0;i<v[nod].size();i++)
    {
        if (v[nod][i] == tata)
            continue;
        dfs(v[nod][i], nod);
    }
}

int findEgg(int n, vector < pair < int, int > > bridges)
{
    for (int i=0;i<n-1;i++)
    {
        v[bridges[i].first].push_back(bridges[i].second);
        v[bridges[i].second].push_back(bridges[i].first);
    }

    dfs(1, 0);

    int l=1, r=n;
    while (l < r)
    {
        int mid = (l + r) / 2;

        vector<int>acm;
        for (int i=0; i<mid; i++)
            acm.push_back(ord[i]);

        if (query(acm))
            r = mid;
        else
            l = mid + 1;
    }

    int ans = ord[r-1];
    for (int i=1; i<=n; i++)
        v[i].clear();
    ord.clear();
    return ans;
}

Compilation message

eastereggs.cpp: In function 'void dfs(int, int)':
eastereggs.cpp:11:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int i=0;i<v[nod].size();i++)
      |                  ~^~~~~~~~~~~~~~

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Number of queries: 4
2 Correct 1 ms 208 KB Number of queries: 4
3 Correct 1 ms 208 KB Number of queries: 4
4 Correct 2 ms 208 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 476 KB Number of queries: 8
2 Correct 11 ms 356 KB Number of queries: 9
3 Correct 15 ms 356 KB Number of queries: 9
4 Correct 13 ms 336 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 336 KB Number of queries: 9
2 Correct 14 ms 336 KB Number of queries: 9
3 Correct 19 ms 360 KB Number of queries: 9
4 Correct 21 ms 468 KB Number of queries: 9