Submission #72685

#	Time	Username	Problem	Language	Result	Execution time	Memory
72685		memikakizaki	Hidden Sequence (info1cup18_hidden)	C++14	100 / 100	13 ms	628 KiB

hidden

#include "grader.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> findSequence(int n) {
  int cnt_small = 0, small = 0;
  vector<int> tmp;
  while(cnt_small <= n / 2) {
    tmp.push_back(0);
    if(!isSubsequence(tmp))
      break;
    ++cnt_small;
  }
  if(cnt_small == n / 2 + 1) {
    cnt_small = 0;
    tmp.clear();
    small = 1;
    while(cnt_small <= n / 2) {
      tmp.push_back(1);
      if(!isSubsequence(tmp))
        break;
      ++cnt_small;
    }
  }

  int l_larges = 0, r_larges = n - cnt_small;
  vector<int> ans;

  for(int sect = 0; sect <= cnt_small; sect++) {
    bool valid = true;
    while(valid && r_larges) {
      vector<int> query_vec;
      if(cnt_small - sect + l_larges <= sect + r_larges) {
        for(int i = 0; i < l_larges + 1; i++)
          query_vec.push_back(small ^ 1);
        for(int i = 0; i < cnt_small - sect; i++)
          query_vec.push_back(small);
        if(isSubsequence(query_vec)) {
          ans.push_back(small ^ 1);
          ++l_larges;
          --r_larges;
        } else
          valid = false;
      } else {
        for(int i = 0; i < sect + 1; i++)
          query_vec.push_back(small);
        for(int i = 0; i < r_larges; i++)
          query_vec.push_back(small ^ 1);
        if(!isSubsequence(query_vec)) {
          ans.push_back(small ^ 1);
          ++l_larges;
          --r_larges;
        } else
          valid = false;
      }
    }
    if(sect != cnt_small)
      ans.push_back(small);
  }

  return ans;
}

Compilation message (stderr)

grader.cpp: In function 'int main()':
grader.cpp:28:43: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
     fprintf (fifo_out, "%d\n", ans.size ());
                                ~~~~~~~~~~~^
grader.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<ans.size () && i < N; i++)
                   ~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 80 / 80