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Submission #61595

# Submission time Handle Problem Language Result Execution time Memory
61595 2018-07-26T07:50:36 Z DrumpfTheGodEmperor Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 47 ms 708 KB 
#include <bits/stdc++.h>
#include "grader.h"
#define pb push_back
#define fi first
#define se second
#define bw(i,r,l) for (int i=r-1;i>=l;i--)
#define fw(i,l,r) for (int i=l;i<r;i++)
#define fa(i,x) for (auto i:x)
using namespace std;
const int N=600;
vector<int> vec,G[N],ask;
void dfs(int u,int p) {
	vec.pb(u);
	fa (v,G[u]) if (v!=p) dfs(v,u);
}
int findEgg(int n,vector<pair<int,int>> bridges) {
	vec.clear();
	fw (i,1,n+1) G[i].clear();
	fa (i,bridges) {
		G[i.fi].pb(i.se);
		G[i.se].pb(i.fi);
	}
	dfs(1,0);
	int l=0,r=n-1;
	while (l<r) {
		int mid=(l+r)/2;
		ask.clear();
		fw (i,0,mid+1) ask.pb(vec[i]);
		if (query(ask)) r=mid;
		else l=mid+1;
	}
	return vec[l];
}

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 248 KB Number of queries: 4
2 Correct 3 ms 436 KB Number of queries: 4
3 Correct 3 ms 436 KB Number of queries: 4
4 Correct 3 ms 436 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 512 KB Number of queries: 8
2 Correct 17 ms 540 KB Number of queries: 9
3 Correct 22 ms 544 KB Number of queries: 9
4 Correct 16 ms 568 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 568 KB Number of queries: 9
2 Correct 36 ms 572 KB Number of queries: 9
3 Correct 34 ms 572 KB Number of queries: 9
4 Correct 20 ms 708 KB Number of queries: 9