Submission #49401

#	Time	Username	Problem	Language	Result	Execution time	Memory
49401		georgerapeanu	Easter Eggs (info1cup17_eastereggs)	C++11	81 / 100	12 ms	600 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;
map< vector<int> , int > Map;
bool done = 0;


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());
    if(Map.count(que)){
        return Map[que];
    }
    return Map[que] = query(que);
}

int findEgg (int N, vector < pair < int, int > > bridges){
    Map.clear();
    if(!done){
        nodes.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);
        }

        linearize(1,0);

        done = 1;
    }

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

Compilation message (stderr)

eastereggs.cpp: In function 'bool ok(int, int)':
eastereggs.cpp:35:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     return Map[que] = query(que);

• Subtask 1: 32 / 40
• Subtask 2: 34 / 40
• Subtask 3: 15 / 20