Submission #76579

#	Time	Username	Problem	Language	Result	Execution time	Memory
76579		Xylofo	Mechanical Doll (IOI18_doll)	C++14	100 / 100	155 ms	11100 KiB

doll

#include <bits/stdc++.h>
#include "doll.h"
using namespace std;
#define rep(i,a,b) for(int i = a; i<b; ++i)
using vi = vector<int>;

void create_circuit(int m, vi a) {
  a.push_back(0);
  int n = a.size();
  int nn = (n+1)/2;
  vi x(nn),y(nn);
  auto add = [&](int e1, int e2) {
    y.push_back(-e1-1);
    x.push_back(-e2-1);
  };
  int l = 0, r = nn;
  while(r-l != 1) {
    for(; l+1 < r; l+=2) add(l, l+1);
    if(l < r) add(l++, -1);
    r = x.size();
  }
  rep(i,0,r) {
    if(x[i] == 0) x[i] = -r;
    if(y[i] == 0) y[i] = -r;
  }
  vi c(m+1, -r);
  int cnt = 0;
  int node = 0;
  vi state(x.size(), 0);
  int stCount = 0;
  while(cnt < n) {
    if(node < 0) {
      node = -node-1;
      state[node] = 1-state[node];
      stCount += 2*state[node]-1;
      int& nxt = state[node] ? x[node] : y[node];
      if(node < nn) {
        if(cnt < n-1 || stCount == 0)
          nxt = a[cnt++];
      }
      node = nxt;
    }
    else node = c[node];
  }
  // rep(i,0,m+1) cout << i << " " << c[i] << endl;
  // rep(i,0,r) cout << -(i+1) << " " << x[i] << " " << y[i] << endl;
  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