Submission #97329

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
97329	2019-02-15 08:58:07	E869120	Mechanical Doll (IOI18_doll)	C++14	100 / 100	156 ms	14100 KiB

doll

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#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
struct Node {
  int ty, l, r;
};
int N, cnts = 2; Node G[500009];
void create_circuit(int M, std::vector<int> A) {
  N = A.size(); N++;
  int dep = 0; for (int i = 0; i < 22; i++) { int Z = (1 << i); if (Z >= N) { dep = i; break; } }
  
  for (int i = 0; i < 500009; i++) G[i] = Node{0, -1, -1};
  
  vector<int>T; T.push_back(1);
  for (int i = dep - 1; i >= 1; i--) {
    int A = (N + (1 << i) - 1) / (1 << i); vector<int> TT;
    int AL = 0, AR = A - 1; if (A % 2 == 1) { AL++; AR++; }
    for (int j = AL; j <= AR; j++) {
      if (j % 2 == 0) {
        G[T[j / 2]].l = cnts; TT.push_back(cnts); cnts++;
      }
      else {
        G[T[j / 2]].r = cnts; TT.push_back(cnts); cnts++;
      }
    }
    T = TT;
  }
 
 
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Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:41:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   else if (i < A.size()) I = A[i];
      |            ~~^~~~~~~~~~

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