Submission #152379

#	Time	Username	Problem	Language	Result	Execution time	Memory
152379		Breno_XD	Poklon (COCI17_poklon7)	C++14	96 / 120	1075 ms	20376 KiB

poklon

#include <bits/stdc++.h>
using namespace std;
#define x first
#define y second

const int MAXN = 1000010;
int n, aans, bans;
int nivel[MAXN];
queue<pair<int,int> > fila;

struct nodes{

	int l,r;

};

nodes node[MAXN];

void dfs(int f, int p){

	// cout << "Demonstracao: " << f << "    " << p << endl;

	nivel[f] = nivel[p] + 1;

	if(node[f].r < 0) fila.push(make_pair(abs(node[f].r) , nivel[f]+1));		
	else dfs(node[f].r, f);

	if(node[f].l < 0) fila.push(make_pair(abs(node[f].l) , nivel[f]+1));
	else dfs(node[f].l, f);

}


int main(){

	// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

	cin >> n;

	for(int i=1; i<=n; i++) cin >> node[i].l >> node[i].r;

	nivel[0] = -1;
	dfs(1,0);

	while(!fila.empty()){

		pair<int,int> atual = fila.front();
		fila.pop();

		//Vamos compara ans e atual.x

		// cout << "Atual: " << atual.x << "   " << atual.y << endl;
		// cout << "Ans:   " << aans << "   " << bans << endl; 

		//Primeiro verificamos o último bit
		int tam = 32-__builtin_clz(atual.x) + atual.y;
		int tamans = 32-__builtin_clz(aans) + bans;

		if(tamans != tam){

			if(tamans < tam){

				// cout << "Atualizei tamdiff\n";
				aans = atual.x;
				bans = atual.y;

			}

		}else{

			tam = 31-__builtin_clz(atual.x);
			tamans = 31-__builtin_clz(aans);

			int size = min(tam, tamans);

			for(int i=size; i>=0; i--){

				// cout << "i: " << i << endl;
				// cout << "Tam: " << tam << "    tamans: " << tamans << endl; 

				bool ok = (atual.x&(1<<tam));
				bool okans = (aans&(1<<tamans));

				if(ok && !okans){
					//cout << "Atualizei tamiguais\n";
					aans = atual.x;
					bans = atual.y;
					break;
				}
				if(!ok && okans) break;

				tam--;
				tamans--;

			}

		}

	}

	bool verifica = false;
	for(int i=30; i>=0; i--){

		if((aans&(1<<i))) verifica = true;

		if(!verifica) continue;

		bool bit = (aans&(1<<i));

		cout << bit;

	}

	for(int i=1; i<=bans; i++){

		cout << 0;

	}

	cout << "\n";

}

• Subtask 1: 96 / 120