Submission #585942

#	Time	Username	Problem	Language	Result	Execution time	Memory
585942		Vanilla	Mechanical Doll (IOI18_doll)	C++17	100 / 100	137 ms	13636 KiB

doll

#include <bits/stdc++.h>
#include "doll.h"
using namespace std;
const int maxn = 2e5 + 2;
int state [maxn * 2]; 
vector<int> x(2 * maxn), y(2 * maxn);
int n, k, depth, ct;

int dfs(int l, int r) {
	if (l >= n) return -1;
  if (r - l > 1) {
    int mid = (l + r) / 2, u = ct++;
    y[u] = dfs(l, mid);
    x[u] = dfs(mid, r);
    return -u-1;
  }
  return 1;
}
 
void create_circuit(int m, vector<int> a) {
  a.push_back(0);
  n = a.size();
  vector<int> c(m + 1, -1);
  for (int i = 0; i < 30; i++){
    if ((1 << i) >= n) {
      depth = i;
      break;
    }
  }
  k = (1 << depth);
  dfs(0, k);
  for (int i: a) {
    int node = 0;
    while (node >= 0) {
      int &next = state[node] ? y[node]: x[node];
      state[node]^=1;
      if (next >= 0) next = i, node = -1;
      node = -next-1;
    }
  }
  x.resize(ct);
  y.resize(ct);
  answer(c, x, y);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 18 / 18
• Subtask 6: 56 / 56