Submission #61595

#	Time	Username	Problem	Language	Result	Execution time	Memory
61595		DrumpfTheGodEmperor	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	47 ms	708 KiB

eastereggs

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