Submission #1256928

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256928		noyancanturk	Island Hopping (JOI24_island)	C++20	100 / 100	3 ms	424 KiB

island

#include "island.h"

#include<bits/stdc++.h>
using namespace std;

#define pb push_back

namespace {
  int isroot[501];
  vector<pair<int,int>>ans;
  int parent[501];
  int find(int i){
    if(i==parent[i])return i;
    return parent[i]=find(parent[i]);
  }
  void unite(int i,int j){
    parent[find(i)]=find(j);
  }
}

void solve(int n, int L) {
  for(int i=1;i<=n;i++)parent[i]=i;
  for(int i=2;i<=n;i++){
    int res=query(i,1);
    if(res<i){
      ans.pb({res,i});
      unite(i,res);
    }else isroot[i]=1;
  }
  for(int i=2;i<=n;i++){
    if(isroot[i])continue;
    for(int k=2;k<=n-1;k++){
      int res=query(i,k);
      if(res<i&&find(i)!=find(res)){
        unite(i,res);
        ans.pb({res,i});
      }else break;
    }
  }
  for(auto[x,y]:ans) answer(x,y);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 7 / 7
• Subtask 4: 9 / 9
• Subtask 5: 13 / 13
• Subtask 6: 15 / 15
• Subtask 7: 22 / 22
• Subtask 8: 28 / 28