oj.uz

답안 #1095265

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1095265 2024-10-01T17:02:15 Z idiotcomputer Easter Eggs (info1cup17_eastereggs) C++11
0 / 100
 1 ms 600 KB 
#include "grader.h"
#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pb push_back
#define sz(x) (int) (x).size()

const int mxN = 520;
vector<int> adj[mxN];
vector<int> ord;
//int res = 0;
//int k;
/*
bool query(vector<int> &cur){
	res++;
	for (int c : cur) if (c == k) return 1;
	return 0;
}*/

void dfs(int node, int p, int ss){
	if (sz(ord) >= ss) return;
	ord.pb(node);
	for (int c : adj[node]){
		if (c != p) dfs(c,node,ss);
	}
}

int findEgg(int n, vector<pair<int,int>> bridges){
	for (int i = 0; i < n-1; i++){
		adj[bridges[i].f-1].pb(bridges[i].s-1);
		adj[bridges[i].s-1].pb(bridges[i].f-1);
	}

	int l = -1;
	int r = n-1;
	int cur;
	while (r-l>1){
		cur = (l+r)/2;
		dfs(0,-1,cur+1);
		if (query(ord)) r = cur;
		else l = cur;
		ord.clear();
	}	
	dfs(0,-1,r+1);
	return ord[r];
}	

/*
int main() {
	//ios_base::sync_with_stdio(false);
	//cin.tie(NULL);

	int n;
	cin >> n >> k;
	k--;

	vector<pair<int,int>> b(n-1);
	for (int i = 0; i < n-1; i++) cin >> b[i].f >> b[i].s;
	
	cout << findEgg(n,b)+1 << " " << res << '\n';
	return 0;
}
*/

Subtask #1
0 / 40.0

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 Grader output
1 Runtime error 0 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1 ms 600 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -