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Submission #1116802

# Submission time Handle Problem Language Result Execution time Memory
1116802 2024-11-22T12:06:43 Z Sofiatpc Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 20 ms 672 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;

const int MAXN = 520;
vector<int> adj[MAXN], v;

void dfs(int s, int p){
    v.push_back(s);
    for(int viz : adj[s])
        if(viz != p)dfs(viz,s);
}

int findEgg (int n, vector < pair < int, int > > bridges)
{
    for(int i = 1; i <= n; i++)adj[i].clear();
    v.clear();

    for(int i = 0; i < n-1; i++){
        adj[bridges[i].first].push_back(bridges[i].second);
        adj[bridges[i].second].push_back(bridges[i].first);
    }

    dfs(1,0);

    int l = 0, r = n-1;
    while(l != r){
        int mid = (l+r)/2;

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

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

    return v[l];
}

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 336 KB Number of queries: 4
2 Correct 2 ms 336 KB Number of queries: 4
3 Correct 2 ms 336 KB Number of queries: 4
4 Correct 2 ms 336 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 592 KB Number of queries: 8
2 Correct 14 ms 500 KB Number of queries: 9
3 Correct 20 ms 584 KB Number of queries: 9
4 Correct 17 ms 336 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 672 KB Number of queries: 9
2 Correct 14 ms 500 KB Number of queries: 9
3 Correct 18 ms 336 KB Number of queries: 9
4 Correct 17 ms 592 KB Number of queries: 9