oj.uz

Submission #743600

# Submission time Handle Problem Language Result Execution time Memory
743600 2023-05-17T14:20:18 Z AndrijaM Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 16 ms 372 KB 
#include <bits/stdc++.h>
#include "grader.h"
 
using namespace std;
 
vector<int>g[513];
vector<int>a;
 
void dfs(int node,int par)
{
    a.push_back(node);
    for(auto idx:g[node])
    {
        if(idx!=par)
        dfs(idx,node);
    }
}
 
int findEgg (int n, vector < pair < int, int > > b)
{
    for (int i = 1; i <= n; i++) g[i].clear();
	a.clear();
    for(auto idx:b)
    {
        g[idx.first].push_back(idx.second);
        g[idx.second].push_back(idx.first);
    }
    dfs(1,-1);
    int l=1;
    int r=n;
    while(l<r)
    {
        int mid=l+(r-l)/2;
        if(query(vector<int>(a.begin(),a.begin()+mid)))r=mid;
        else
        {
            l=mid+1;
        }
    }
    return a[l-1];
}

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 1 ms 208 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Number of queries: 8
2 Correct 10 ms 352 KB Number of queries: 9
3 Correct 15 ms 348 KB Number of queries: 9
4 Correct 15 ms 336 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 372 KB Number of queries: 9
2 Correct 13 ms 336 KB Number of queries: 9
3 Correct 16 ms 344 KB Number of queries: 9
4 Correct 15 ms 336 KB Number of queries: 9