Submission #1162712

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1162712	2025-03-06 14:52:34	cnn008	Easter Eggs (info1cup17_eastereggs)	C++20	87 / 100	8 ms	512 KiB

eastereggs

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#include "grader.h"
#include <bits/stdc++.h>
using namespace std;
vector <int> g[515],e;
void dfs(int u, int p){
  e.push_back(u);
  for(auto v:g[u]) if(v!=p) dfs(v,u);
}
int findEgg(int n, vector <pair <int,int> > bridges){
  for(int i=1; i<=n; i++) g[i].clear();
  e.clear();
  for(auto [u,v]:bridges){
    g[u].push_back(v);
    g[v].push_back(u);
  }
  dfs(1,0);
  int l=1,r=n,ans=0;
  while(l<=r){
    int mid=(l+r)>>1;
    vector <int> cur;
    for(int i=0; i<mid; i++) cur.push_back(e[i]);
    if(query(cur)) ans=mid,r=mid-1;
    else l=mid+1;
  }
  return e[ans-1];
}
 
 
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• Subtask 1: 32 / 40
• Subtask 2: 40 / 40
• Subtask 3: 15 / 20