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Submission #1096885

# Submission time Handle Problem Language Result Execution time Memory
1096885 2024-10-05T10:39:22 Z 0pt1mus23 Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 15 ms 748 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;
const int sze = 600;
vector<int> graph[sze];
vector<int> path;

void dfs(int node,int par=-1){
    path.push_back(node);
    for(auto v:graph[node]){
        if(v==par){
            continue;
        }
        dfs(v,node);
    }
}

int findEgg(int n, vector<pair<int,int>> edges){
    path.clear();
    for(int i=0;i<=n;i++){
        graph[i].clear();
    }
    for(auto v:edges){
        graph[v.first].push_back(v.second);
        graph[v.second].push_back(v.first);
    }
    dfs(1);
    int l =0;
    int r = n-2;
    vector<int> lst;
    int ans = path.back();
    while(l<=r){
        int mid = (l+r)/2;
        lst.clear();
        for(int i=0;i<=mid;i++){
            lst.push_back(path[i]);
        }
        if(query(lst)){
            ans=lst.back();
            r = mid-1;
        }
        else{
            l = mid+1;
        }
    }
    return ans;
}

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 356 KB Number of queries: 4
2 Correct 1 ms 344 KB Number of queries: 4
3 Correct 1 ms 344 KB Number of queries: 4
4 Correct 0 ms 344 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Number of queries: 8
2 Correct 6 ms 504 KB Number of queries: 9
3 Correct 11 ms 340 KB Number of queries: 9
4 Correct 15 ms 344 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Number of queries: 9
2 Correct 8 ms 344 KB Number of queries: 9
3 Correct 9 ms 344 KB Number of queries: 9
4 Correct 13 ms 748 KB Number of queries: 9