Submission #967460

#	Time	Username	Problem	Language	Result	Execution time	Memory
967460		LucaIlie	Hidden Sequence (info1cup18_hidden)	C++17	59 / 100	51 ms	700 KiB

hidden

#include <iostream>
#include <vector>
#include "grader.h"
 
using namespace std;
 
vector <int> vans;
vector <int> seq;
 
bool ask( int nr0, int nr1, int s ) {
    int i;
 
    seq.clear();
 
    if ( nr0 + nr1 == 0 )
        return 1;
 
    for ( i = 0; i < nr1; i++ )
        seq.push_back( 1^s );
    for ( i = 0; i < nr0; i++ )
        seq.push_back( 0^s );
 
    return isSubsequence( seq );
}
 
void add( int b, int x ) {
    int i;
 
    for ( i = 0; i < x; i++ )
        vans.push_back( b );
}
 
vector <int> findSequence( int n ) {
    int nr0, nr1, s, zero, ram0, i;
 
  
  	int l = 1, r = n + 1;
  	while ( r - l > 1 ) {
      int mid = (l + r) / 2;
      if ( ask( mid, 0, 0 ) )
        l = mid;
      else
        r = mid;
    }
  	nr0 = l;
    if ( nr0 > n / 2 ) {
        nr1 = nr0;
        nr0 = n - nr0;
        s = 1;
    } else {
        nr1 = n - nr0;
        s = 0;
    }
 
    ram0 = nr0;
    for ( i = 1; i <= nr1; i++ ) {
        zero = 0;
        while ( zero <= ram0 && ask( zero, i, s ) )
            zero++;
        zero--;
 
        add( s, ram0 - zero );
        ram0 = zero;
        add( !s, 1 );
    }
    add( s, ram0 );
 
    return vans;
}

Compilation message (stderr)

grader.cpp: In function 'int main()':
grader.cpp:28:26: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   28 |     fprintf (fifo_out, "%d\n", ans.size ());
      |                         ~^     ~~~~~~~~~~~
      |                          |              |
      |                          int            std::vector<int>::size_type {aka long unsigned int}
      |                         %ld
grader.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=0; i<ans.size () && i < N; i++)
      |                   ~^~~~~~~~~~~~

• Subtask 1: 15 / 20
• Subtask 2: 44 / 80