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Submission #67923

# Submission time Handle Problem Language Result Execution time Memory
67923 2018-08-15T14:18:36 Z hamzqq9 Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 41 ms 572 KB 
#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

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
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Number of queries: 4
2 Correct 3 ms 308 KB Number of queries: 4
3 Correct 3 ms 512 KB Number of queries: 4
4 Correct 3 ms 512 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 528 KB Number of queries: 8
2 Correct 20 ms 528 KB Number of queries: 9
3 Correct 35 ms 568 KB Number of queries: 9
4 Correct 29 ms 568 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 568 KB Number of queries: 9
2 Correct 22 ms 572 KB Number of queries: 9
3 Correct 28 ms 572 KB Number of queries: 9
4 Correct 27 ms 572 KB Number of queries: 9