Submission #75262

#	Time	Username	Problem	Language	Result	Execution time	Memory
75262		KieranHorgan	Mechanical Doll (IOI18_doll)	C++17	0 / 100	1 ms	256 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
 
pair<int, int> exits[400005];
vector<int> X, Y;
int nodeIdx = 1;
void build(vector<int> cur) {
  int curNode = nodeIdx++;
  if(cur.size() == 1) {
    if(cur[0] < 0) {
      if(cur[0] == -(1<<30)) cur[0] = 1;
      exits[curNode] = {-cur[0], 0};
      return;
    }
    if(cur[0] == (1<<30)) cur[0] = -1;
    exits[curNode] = {cur[0], -1};
    return;
  }
 
  vector<int> nextCur;
  for(int i = 0; i < cur.size(); i+=2) {
    nextCur.push_back(cur[i]);
  }
  build(nextCur);
  nextCur.clear();
 
  exits[curNode] = {-(curNode+1), -(nodeIdx)};
  for(int i = 1; i < cur.size(); i+=2) {
    nextCur.push_back(cur[i]);
  }
  build(nextCur);
  nextCur.clear();
}
 
void create_circuit(int M, vector<int> A) {
  int N = A.size();
  while(__builtin_popcount(A.size()) != 1) {
    A.push_back(1<<30);
  }
  vector<int> C(M + 1);
  C[0] = -1;
  for (int i = 1; i <= M; ++i) {
    C[i] = -1;
  }
 
  vector<int> cur;
  for(int i = 0; i < A.size(); i++) {
    cur.push_back(A[i]);
  }
  cur.back() = -cur.back();
 
  build(cur);
 
  for(int i = 1; i < nodeIdx; i++) {
    X.push_back(exits[i].first);
    Y.push_back(exits[i].second);
    // cerr << i << ": " << X.back() << " " << Y.back() << endl;
  }

  // cerr << N << " -> " << X.size() << "   (" << N + log2(N) << ")" << endl;
  // double score;
  // if(X.size() <= N + log2(N)) score = 100;
  // else if(X.size() > 2*N) score = 0;
  // else score = 100*(0.5 + 0.4 * ( (2*N - X.size()) / (N - log2(N)) ) * ( (2*N - X.size()) / (N - log2(N)) ));
  // cerr << "Score: " << score << endl;
  
  answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'void build(std::vector<int>)':
doll.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   for(int i = 0; i < cur.size(); i+=2) {
      |                  ~~^~~~~~~~~~~~
doll.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   for(int i = 1; i < cur.size(); i+=2) {
      |                  ~~^~~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:48:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   for(int i = 0; i < A.size(); i++) {
      |                  ~~^~~~~~~~~~
doll.cpp:37:7: warning: unused variable 'N' [-Wunused-variable]
   37 |   int N = A.size();
      |       ^

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