Submission #1099554

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099554		Choco	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	1 ms	760 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
#define ll long long
using namespace std;
vector<vector<int>>v(520);
vector<int>order;
vector<bool>check(520,0);
void dfs(int i){
    check[i]=1;
    order.push_back(i);
    for(auto j: v[i])
    if(!check[j])
    dfs(j);
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
    for(int i=0;i<513;i++){
    v[i].clear();
    check[i]=0;
    }
    order.clear();
    for(int i=0;i<N-1;i++){
        int x=bridges[i].first;
        int y=bridges[i].second;
        v[i].push_back(y);
        v[y].push_back(x);
    }
    dfs(1);
    int l=0,r=N-1;
    while(l!=r){
        ll mid=(l+1+r)/2;
        if(query(vector<int>(order.begin(),order.begin()+mid)))
        r=mid-1;
        else
        l=mid;
    }
    return order[l];
}

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