Submission #1137812

#	Time	Username	Problem	Language	Result	Execution time	Memory
1137812		mariam197	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	8 ms	684 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
//#include "grader.cpp"

using namespace std;
vector<int> adj[520];
vector<int> vec;
void dfs(int node,int p){
        vec.push_back(node);
        for(auto child: adj[node]){
            if(child!=p)
                dfs(child,node);
        }
}
int ask(int mid){
    vector<int> a;
    for(int i=0;i<=mid;i++){
        a.push_back(vec[i]);
    }
    return query(a);
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
    for(pair<int,int> i: bridges){
        adj[i.first].push_back(i.second);
        adj[i.second].push_back(i.first);
    }
    dfs(1,-1);
    int l=0,r=N-1;
    while(l<r){
        int mid=(l+r)/2;
        if(ask(mid)){
            r=mid;
        }
        else{
            l=mid+1;
        }
    }
    for(int i=0;i<=N;i++) adj[i].clear();
    return vec[l];
}

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