Submission #518726

#	Time	Username	Problem	Language	Result	Execution time	Memory
518726		LucaIlie	Hidden Sequence (info1cup18_hidden)	C++17	0 / 100	62 ms	276 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;

    nr0 = 0;
    while ( nr0 <= n / 2 + 1 && ask( nr0, 0, 0 ) )
        nr0++;
    nr0--;
    if ( nr0 == n / 2 + 1 ) {
        while ( !ask( 0, n - nr0, 0 ) )
            nr0++;
        nr1 = nr0;
        nr0 = n - nr0;
        s = 1;
    } else {
        nr1 = n - nr0;
        s = 0;
    }

    ram0 = nr0;
    for ( i = 1; i <= nr1; i++ ) {
        if ( i <= nr1 / 2 ) {
            zero = 0;
            while ( zero <= nr0 && ask( zero, i, s ) )
                zero++;
            zero--;

            add( s, ram0 - zero );
            ram0 = zero;
            add( !s, 1 );
        } else {
            zero = 0;
            while ( ram0 <= nr0 && ask( i, zero, !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: 0 / 20
• Subtask 2: 0 / 80