oj.uz

Submission #990276

# Submission time Handle Problem Language Result Execution time Memory
990276 2024-05-30T06:00:59 Z xnqs Easter Eggs (info1cup17_eastereggs) C++17
0 / 100
 1 ms 600 KB 
// omfg why would you use namespace std in a header file like are you ok?????????

#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
//#include "grader.h"

int findEgg(int n, std::vector<std::pair<int,int>> bridges);
int query(std::vector<int> islands);

int gs;

void dfs(int k, int p, const std::vector<std::vector<int>>& adj_list, std::vector<int>& tour) {
	tour.emplace_back(k);
	for (const auto& i : adj_list[k]) {
		if (i!=p) {
			dfs(i,k,adj_list,tour);
			tour.emplace_back(k);
		}
	}
}

int findEgg(int n, std::vector<std::pair<int,int>> bridges) {
	std::vector<std::vector<int>> adj_list;
	std::vector<int> tour;
	gs = n;
	adj_list.resize(gs+1);
	for (const auto& [a, b] : bridges) {
		adj_list[a].emplace_back(b);
		adj_list[b].emplace_back(a);
	}
	
	dfs(1,0,adj_list,tour);

	int l = 0, r = tour.size()-1;
	int ret = 0;
	while (l<=r) {
		int m = (l+r)/2;
		std::vector<int> tmp;
		for (int i = 0; i <= m; i++) {
			tmp.emplace_back(tour[i]);
		}
		if (query(tmp)) {
			ret = m;
			r = m-1;
		}
		else {
			l = m+1;
		}
	}

	ret = tour[ret];
	return ret;
}

Subtask #1
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -