Submission #1038981

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038981		Unforgettablepl	Island Hopping (JOI24_island)	C++17	100 / 100	7 ms	684 KiB

island

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


void solve(int N,int L){
	vector<vector<int>> adj(N+1);
	function<bool(int,int,int)> reachable = [&](int x,int p,int tar){
		if(x==tar)return true;
		for(int&i:adj[x])if(i!=p)if(reachable(i,x,tar))return true;
		return false;
	};
	for(int i=1;i<=N;i++){
		for(int j=1;j<N;j++){
			auto t = query(i,j);
			if(t>=i)break;
			if(reachable(i,-1,t))break;
			adj[i].emplace_back(t);
			adj[t].emplace_back(i);
			answer(i,t);
		}
	}
}

• 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