Submission #975438

#	Time	Username	Problem	Language	Result	Execution time	Memory
975438		Error404	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	12 ms	1004 KiB

eastereggs

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

using namespace std;
#define pb push_back
#define pl pair<ll,int>
#define ll long long
#define f first
#define s second
#define pi pair<int,int>

const int MAX = 514;
vector<int>nodes;
vector<int>g[MAX];


void dfs(int u, int p){
    nodes.pb(u);
    for(int i : g[u]){
        if(i==p) continue;
        dfs(i,u);
    }
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
    for(int i = 1;  i<=N; i++) g[i].clear();
    nodes.clear();
    for(pi i: bridges){
        g[i.f].pb(i.s);
        g[i.s].pb(i.f);
    }
    dfs(1,0);

    int l = 0, r=N-1;


    while(l<r){
        int m = (l+r+1)/2;
        bool ans  = query(vector<int>(nodes.begin(), nodes.begin()+m));
        if(ans){
            r  = m-1;
        }
        else l = m;
    }
    //cout << "fsdfd"<< endl;
    return nodes[l];
}

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