Submission #867535

#	Time	Username	Problem	Language	Result	Execution time	Memory
867535		pizzamoeger	popa (BOI18_popa)	C++14	100 / 100	51 ms	676 KiB

popa

#include <bits/stdc++.h>
#include "popa.h"
#define ll long long
 
using namespace std;
 
int quuu(int a, int b, int c, int d, int N) {
  assert(a >= 0 && a < N);
  assert(b >= 0 && b < N);
  if (a > b) swap(a, b);
  assert(c >= 0 && c < N);
  assert(d >= 0 && d < N);
  if (c > d) swap(c, d);
  return query(a, b, c, d);
}
 
int solve(int N, int* Left, int* Right) {
	vector<int> parent (N, -1);
	
	for (int i = 0; i < N; i++) {
		Left[i] = -1;
		Right[i] = -1;
	}
 
	int rl = 0;
	for (int i = 1; i < N; i++) {
		int v = rl;
		while(parent[v] != -1 && quuu(i, i, i, v, N) == 1) {
			v = parent[v];
		}
 
		if (parent[v] == -1) {
			if (quuu(i, i, i, v, N)) {
				parent[v] = i;
				Left[i] = v;
				rl = i;
			} else {
				parent[i] = v;
				Left[i] = Right[v];
				Right[v] = i;
				rl = i;
			}
		} else {
			parent[i] = v;
			Left[i] = Right[v];
			Right[v] = i;
			rl = i;
		}
	}
 
	int root = rl;
	while (parent[root] != -1) root = parent[root];
	return root;
}
 
/*signed main() {
	const int N = 6;
	int* Left = new int[N];
	int* Right = new int[N];
	int ret = solve(N, Left, Right);
	cerr << ret;
 
	for (int i = 0; i < N; i++) {
		cout << Left[i] << " " << Right[i] << "\n";
	}
 
	return 0;
}*/

• Subtask 1: 37 / 37
• Subtask 2: 24 / 24
• Subtask 3: 39 / 39