Submission #1198714

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198714		JungPS	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	8 ms	504 KiB

eastereggs

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

using namespace std;

vector<int> vec[520];
vector<int> vec2;
void dfs(int x,int p){
    vec2.push_back(x);
    for(auto i:vec[x]){
        if(i==p) continue;
        dfs(i,x);
    }
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
    for(int i=1;i<=N;++i) vec[i].clear();
    vec2.clear();
    for(auto i:bridges){
        vec[i.first].push_back(i.second);
        vec[i.second].push_back(i.first);
    }
    dfs(1,-1);
    int l=1,r=N;
    while(l<r){
        int mid=(l+r)>>1;
        vector<int> tmp;
        for(int i=0;i<mid;++i) tmp.push_back(vec2[i]);
        if(query(tmp)) r=mid;
        else l=mid+1;
    }
    return vec2[l-1];
}

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