Submission #199174

#	Time	Username	Problem	Language	Result	Execution time	Memory
199174		Bagritsevich_Stepan	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	35 ms	632 KiB

eastereggs

#include<bits/stdc++.h>
#include "grader.h"
using namespace std;
 
vector < int > q, g[10000];
 
void dfs(int v, int pr = -1){
    q.push_back(v);
    for(int to : g[v]){
        if(to != pr){
            dfs(to, v);
        }
    }
}
 
int findEgg(int N, vector < pair < int, int > > bridges){
    q.clear();
    for(int i = 1; i <= N; i++){
        g[i].clear();
    }
    for(auto it : bridges){
        g[it.first].push_back(it.second);
        g[it.second].push_back(it.first);
    }
    dfs(1);
    int l = 1, r = N;
    while(l < r){
        int mid = (r + l) >> 1;
        if(query(vector < int >(q.begin(), q.begin() + mid))){
            r = mid;
        }
        else{
            l = mid + 1;
        }
    }
    return q[l - 1];
}

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