Submission #360349

#	Time	Username	Problem	Language	Result	Execution time	Memory
360349		amunduzbaev	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	23 ms	620 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
 
#ifndef EVAL
#include "grader.cpp"
#endif
 
#define pb push_back
#define ff first
#define ss second
#define sz(x) (int)x.size()
#define pii pair<int, int>
 
using namespace std;
 
const int NN = 513;
vector<int> edges[NN];
vector<int> vv;
int nn;
 
void dfs(int u, int p = -1){
	vv.pb(u);
	for(auto x:edges[u]){
		if(x == p) continue;
		dfs(x, u);
	}
}

int findEgg (int N, vector < pair < int, int > > bb){
	for(int i=0;i<NN;i++) edges[i].clear();
	for(auto x:bb){
		edges[x.ff].pb(x.ss);
		edges[x.ss].pb(x.ff);
	}
	vv.clear();
	dfs(1);
	int l = 0, r = sz(vv)-1;
	
	while(l < r){
		int m = (l + r)>>1;
		vector<int> tt;
		for(int i=0;i<=m;i++) tt.pb(vv[i]);
		if(query(tt)) r = m;
		else l = m+1;
	}
	return vv[l];
}

• Subtask 1: 40 / 40
• Subtask 2: 40 / 40
• Subtask 3: 20 / 20