Submission #721981

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
721981	2023-04-11 09:45:46	pere_gil	Thousands Islands (IOI22_islands)	C++17	22.75 / 100	43 ms	9020 KiB

islands

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#include "islands.h"
#include "bits/stdc++.h"
using namespace std;
#define ii pair<int,int>
const int MAX_N=1e5+5;
int piv=-1;
vector<int> path,res;
vector<pair<int,ii>> adj[MAX_N];
vector<bool> vis(MAX_N,false);
void dfs(int u, int pa){
  if(piv!=-1) return;
  vis[u]=true;
  if((!u && adj[u].size()>=2) || (u && adj[u].size()>=3)){
    piv=u;
    int a=-1,b=-1,c=-1,d=-1;
    for(auto v: adj[u]){
      if(v.first==pa) continue;
      if(a==-1)
        a=v.second.first,b=v.second.second;
      else{
        c=v.second.first,d=v.second.second;
        break;
      }
    }
    res=path;
 
 
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• Subtask 1: 0 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 21 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45