Submission #75292

#	Time	Username	Problem	Language	Result	Execution time	Memory
75292		KieranHorgan	Mechanical Doll (IOI18_doll)	C++17	37 / 100	167 ms	12920 KiB

doll

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

vector<int> A, X, Y, C;
int dep[200];
int nextTrigger = -1;
int solve(vector<int> a, int d) {
  if(a.size() == 1) return a[0];
  int trigger = nextTrigger--;
  vector<int> b;
  dep[d]++;
  for(int i = 0; i < a.size(); i+=2)
    b.push_back(a[i]);
  int l = solve(b, d+1);
  b.clear();
  for(int i = 1; i < a.size(); i+=2)
    b.push_back(a[i]);
  int r = solve(b, d+1);
  b.clear();

  if(-(trigger+1) >= X.size())
    X.resize(-(trigger)), Y.resize(-(trigger));
  X[-(trigger+1)] = l;
  Y[-(trigger+1)] = r;
  return trigger;
}

void create_circuit(int M, vector<int> A_) {
  A = A_;
  int N = A.size();
  while(__builtin_popcount(A.size()+1) != 1) {
    A.push_back(-1);
  }
  A.push_back(0);
  C.assign(M+1, -1);

  solve(A, 1);
  // cerr << nextTrigger << endl;
  // for(int i = 1; dep[i]; i++)
    // cerr << i << ": " << dep[i] << endl;
// 
  // cerr << N << " " << X.size() << endl;

  answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'int solve(std::vector<int>, int)':
doll.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |   for(int i = 0; i < a.size(); i+=2)
      |                  ~~^~~~~~~~~~
doll.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |   for(int i = 1; i < a.size(); i+=2)
      |                  ~~^~~~~~~~~~
doll.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   if(-(trigger+1) >= X.size())
      |      ~~~~~~~~~~~~~^~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:31:7: warning: unused variable 'N' [-Wunused-variable]
   31 |   int N = A.size();
      |       ^

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