Submission #883847

#	Time	Username	Problem	Language	Result	Execution time	Memory
883847		AndrijaM	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	11 ms	1000 KiB

eastereggs

#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 ax:g[node])
    {
        if(ax==par)continue;
        dfs(ax,node);
    }
}

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

• Subtask 1: 40 / 40
• Subtask 2: 40 / 40
• Subtask 3: 20 / 20