Submission #49397

#	Time	Username	Problem	Language	Result	Execution time	Memory
49397		georgerapeanu	Easter Eggs (info1cup17_eastereggs)	C++11	66 / 100	154 ms	1152 KiB

eastereggs

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

using namespace std;

vector<int> G[600];
vector<int> nodes;


void linearize(int node,int father){
    nodes.push_back(node);
    for(auto it:G[node]){
        if(it != father){
            linearize(it,node);
            nodes.push_back(node);
        }
    }
}

vector<int> que;
bool ok(int le,int ri){
    que.clear();
    for(int i = le;i <= ri;i++){
        que.push_back(nodes[i]);
    }
    sort(que.begin(),que.end());
    que.resize(unique(que.begin(),que.end()) - que.begin());
    return query(que);
}

int findEgg (int N, vector < pair < int, int > > bridges){
    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);
    }

    linearize(1,0);

    int lo = 0,hi = (int)nodes.size() - 1;
    while(hi - lo > 0){
        int mid = (lo + hi) / 2;
        if(ok(lo,mid)){
            hi = mid;
        }
        else{
            lo = mid + 1;
        }
    }
    return nodes[lo];
}

• Subtask 1: 26.4 / 40
• Subtask 2: 26.4 / 40
• Subtask 3: 13.2 / 20