Submission #1222093

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222093		thelegendary08	Beech Tree (IOI23_beechtree)	C++17	9 / 100	180 ms	57388 KiB

beechtree

#include "beechtree.h"
#include<bits/stdc++.h>
#define int long long
#define f0r(i,n) for(int i = 0; i<n; i++)
#define pb push_back
#define mp make_pair
#define vi vector<int>
#define mii map<int,int>
#define pii pair<int,int>
#define vpii vector<pii>
#define FOR(i, k, n) for(int i = k; i<n; i++)
#define vb vector<bool>
using namespace std;
vector<vi>adj, colset;
vi dep, sts, die, diesum;
int dfs(int node){
	int cur = 1;
	for(auto u : adj[node]){
		dep[u] = dep[node] + 1;
		cur += dfs(u);
	}
	sts[node] = cur;
	return cur;
}
int d2(int node){
	int cur = die[node];
	for(auto u : adj[node]){
		cur += d2(u);
	}
	diesum[node] = cur;
	return cur;
}
std::vector<signed> beechtree(signed N, signed M, std::vector<signed> P, std::vector<signed> C)
{
	vector<signed>ans(N);
	FOR(i, 1, N)ans[i] = 1;
	colset.clear(); colset.resize(N); adj.clear(); adj.resize(N); 
	dep.clear(); dep.resize(N); sts.clear(); sts.resize(N); die.clear(); die.resize(N); diesum.clear(); diesum.resize(N);
	FOR(i, 1, N){
		adj[P[i]].pb(i);
	}
	
	f0r(i, N){
		set<int>tmp;
		for(auto u : adj[i]){
			tmp.insert(C[u]); colset[i].pb(C[u]);
		}
		if(tmp.size() != colset[i].size()){
			die[i] = 1;
		}
	}
	dfs(0);
	d2(0);
	vpii w;
	f0r(i, N){
		w.pb(mp(colset[i].size(), -i));
	}
	sort(w.rbegin(), w.rend());
	/*
	f0r(i, N){
		cout<<w[i].first<<' '<<w[i].second<<'\n';
	}
	*/
	bool ok = 1;
	if(w[0].second != 0)ok = 0;
	set<int>vis;
	f0r(i, M){
		vis.insert(i + 1);
	}
	f0r(i, N){
		set<int>ne;
		for(auto u : colset[-w[i].second]){
			if(!vis.count(u))ok = 0;
			ne.insert(u);
		}
		/*
		for(auto u : vis)cout<<u<<' ';
		cout<<'\n';
		for(auto u : ne)cout<<u<<' ';
		cout<<'\n';
		*/
		if(!ok)break;
		vis = ne;
	}
	if(ok)ans[0] = 1;
	f0r(i, N){
		if(diesum[i] != 0)ans[i] = 0;
	}
    return ans;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 5
• Subtask 3: 9 / 9
• Subtask 4: 0 / 8
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 12
• Subtask 8: 0 / 17
• Subtask 9: 0 / 12