Submission #464806

#	Time	Username	Problem	Language	Result	Execution time	Memory
464806		okaragul	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	1 ms	456 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

vector<vector<int>> g;
vector<int> ord;

void dfs(int v, int p){
    ord.push_back(v);
    for(auto &ch:g[v]) if(ch!=p) dfs(ch, v);
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    g.assign(N, vector<int>()); ord.clear();
    for(int i = 1; i < N; i++){
        auto &[a, b]=bridges[i-1];
        g[a-1].push_back(b-1);
        g[b-1].push_back(a-1);
    }
    dfs(0, -1);
    int l=1, r=N;
    while(l<r){
        int mid=(l+r)/2;
        
        vector<int> tmp;
        for(int i = 0; i < mid; i++) tmp.push_back(ord[i]);

        if(!query(tmp)) l=mid+1;
        else r=mid;
    }
    return l;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20