Submission #67923

#	Time	Username	Problem	Language	Result	Execution time	Memory
67923		hamzqq9	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	41 ms	572 KiB

eastereggs

#include<bits/stdc++.h>
#include "grader.h"
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define umax(x,y) x=max(x,y)
#define umin(x,y) x=min(x,y)
#define ll long long
#define ii pair<int,int>
#define iii pair<int,ii>
#define sz(x) ((int) x.size())
#define orta ((bas+son)>>1)
#define all(x) x.begin(),x.end()
#define dbgs(x) cerr<<(#x)<<" --> "<<(x)<<" "
#define dbg(x) cerr<<(#x)<<" --> "<<(x)<<endl;getchar()
#define pw(x) (1<<(x))
#define inf 1000000000000000000
#define MOD 1000000007
#define MAX 555
#define LOG 22
using namespace std;

int cursz,now,mark[MAX];
vector<int> send;
bool init;
vector<int> v[MAX];

void find_path(int node,int ata) {

	if(now==cursz/2) return ;

	send.pb(node);

	now+=!mark[node];

	for(int i:v[node]) {

		if(i==ata) continue ;

		find_path(i,node);

	}

}

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

	for(int i=1;i<=N;i++) mark[i]=0;

	if(!init) {

		for(int i=0;i<N-1;i++) {

			v[bridges[i].st].pb(bridges[i].nd);
			v[bridges[i].nd].pb(bridges[i].st);

		}
	
		init=true;

	}

	cursz=N;

	while(cursz>1) {

		now=0;

		find_path(1,0);

		if(!query(send)) {

			for(int i:send) mark[i]=1;

			cursz-=cursz/2;

		}
		else {

			cursz=cursz/2;

			for(int i=1;i<=N;i++) mark[i]++;

			for(int i:send) mark[i]--;

		}

		send.clear();

	}

	for(int i=1;i<=N;i++) if(!mark[i]) return i;


}

Compilation message (stderr)

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:96:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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