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Submission #243005

# Submission time Handle Problem Language Result Execution time Memory
243005 2020-06-30T07:18:24 Z minhcool Easter Eggs (info1cup17_eastereggs) C++17
100 / 100
 26 ms 2960 KB 
#include<bits/stdc++.h>
#include "grader.h"
using namespace std;
 
#define fi first
#define se second
#define pb push_back
 
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;
 
vector<int> euler;
vector<int> Adjlist[100005];
 
void dfs(int u, int p){
	euler.pb(u);
	for(int i = 0; i < Adjlist[u].size(); i++){
		int v = Adjlist[u][i];
		if(v == p) continue;
		dfs(v, u);
	}
}
 
int findEgg(int N, vector<ii> bridges){
    for(int i = 1; i <= N; i++) Adjlist[i].clear();
	for(int i = 0; i < bridges.size(); i++){
		Adjlist[bridges[i].fi].pb(bridges[i].se);
		Adjlist[bridges[i].se].pb(bridges[i].fi);
	}
	dfs(1, 1);
	int l = 0, r = N - 1;
	while(l != r){
		int mid = (l + r) >> 1;
		vector<int> nodes;
		nodes.clear();
		for(int i = 0; i <= mid; i++) nodes.pb(euler[i]);
		if(query(nodes)) r = mid;
		else l = mid + 1;
	}
	return euler[l];
}

Compilation message

eastereggs.cpp: In function 'void dfs(int, int)':
eastereggs.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < Adjlist[u].size(); i++){
                 ~~^~~~~~~~~~~~~~~~~~~
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:27:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < bridges.size(); i++){
                 ~~^~~~~~~~~~~~~~~~

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2688 KB Number of queries: 4
2 Correct 7 ms 2688 KB Number of queries: 4
3 Correct 7 ms 2688 KB Number of queries: 4
4 Correct 6 ms 2752 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 2816 KB Number of queries: 8
2 Correct 20 ms 2816 KB Number of queries: 9
3 Correct 26 ms 2960 KB Number of queries: 9
4 Correct 24 ms 2936 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 2928 KB Number of queries: 9
2 Correct 23 ms 2936 KB Number of queries: 9
3 Correct 25 ms 2940 KB Number of queries: 9
4 Correct 24 ms 2936 KB Number of queries: 9