Submission #97631

#	Time	Username	Problem	Language	Result	Execution time	Memory
97631		KLPP	Easter Eggs (info1cup17_eastereggs)	C++14	0 / 100	52 ms	47524 KiB

eastereggs

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

using namespace std;
typedef pair<int,int> pii;
vector<int> nei[1000000];
int findEgg (int N, vector < pair < int, int > > bridges)
{
	int n=N;
	for(int i=0;i<n;i++)nei[i].clear();
	for(int i=0;i<bridges.size();i++){
		nei[bridges[i].first-1].push_back(bridges[i].second-1);
		nei[bridges[i].second-1].push_back(bridges[i].first-1);
	}
	pii dist[n];
	for(int i=0;i<n;i++)dist[i].first=-1,dist[i].second=i;
	queue<int> q;
	q.push(0);
	dist[0].first=0;
	while(!q.empty()){
		int u=q.front();q.pop();
		for(int i=0;i<nei[u].size();i++){
			int v=nei[u][i];
			if(dist[v].first==-1){
				dist[v].first=dist[u].first+1;
				q.push(v);
			}
		}
	}
	sort(dist,dist+n);
	//for(int i=0;i<n;i++)cout<<dist[i].second<<endl;
	int lo=-1;
	int hi=n-1;
	while(hi-lo>1){
		int mid=(hi+lo)/2;
		vector<int> v;
		for(int i=0;i<=mid;i++)v.push_back(dist[i].second+1);
		if(query(v)){
			hi=mid;
		}else lo=mid;
	}
	return hi+1;
}

Compilation message (stderr)

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:11:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<bridges.size();i++){
              ~^~~~~~~~~~~~~~~
eastereggs.cpp:22:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<nei[u].size();i++){
               ~^~~~~~~~~~~~~~

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