Submission #1240718

#	Time	Username	Problem	Language	Result	Execution time	Memory
1240718		nikd	Mechanical Doll (IOI18_doll)	C++20	43 / 100	59 ms	13232 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;

void create_circuit(int M, std::vector<int> A) {
  vector<vector<int>> next(M+1);
  next[0].push_back(A[0]);
  int n = A.size();
  for(int i = 0; i<n-1; i++){
    next[A[i]].push_back(A[i+1]);
  }
  next[A[n-1]].push_back(0);
  int s = 0;
  vector<int> c(M+1);
  vector<int> x, y;
  for(int i = 0; i<=M; i++){
    if(next[i].empty()) c[i] = 0;
    else if(next[i].size() == 1) c[i] = next[i][0];
    else{
      c[i] = -(++s);
      int ns = 1;
      while(ns < next[i].size()) ns <<= 1;
      for(int jj = 0; jj<ns; jj++){
        x.push_back(0);
        y.push_back(0);
      }
      int idx = 0;
      auto build = [&](auto&& build, int curr, int pow2, int md)->void{
        int md1 = md;
        int md2 = md+pow2;  
        pow2 <<= 1;
        if(next[i].size()<= pow2){
          int dlt = pow2-next[i].size();
          x[curr-1] = ((md1 < dlt ? c[i] : next[i][md1-dlt]));          
          y[curr-1] = ((md2 < dlt ? c[i] : next[i][md2-dlt]));          
        }
        else{
          x[curr-1] = (-(++s));
          y[curr-1] = (-(++s));
          build(build, -x[curr-1], pow2, md1);
          build(build, -y[curr-1], pow2, md2);
        }
      };
      build(build, -c[i], 1, 0);
    }
  }
  answer(c, x, y);
  //answer(C, X, Y);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9 / 18
• Subtask 6: 28 / 56