Submission #770094

#	Time	Username	Problem	Language	Result	Execution time	Memory
770094		Andrei	Hidden Sequence (info1cup18_hidden)	C++17	100 / 100	7 ms	304 KiB

hidden

#include <bits/stdc++.h>

#include "grader.h"

using namespace std;

vector <int> aux;

int cntPref[2];
int cntSuff[2];

vector <int> ans;

vector <int> findSequence(int n)
{
    aux.push_back(1);
    while(cntSuff[1]<=n/2)
    {
        if(isSubsequence(aux)==1)
            cntSuff[1]++;
        else
            break;
        aux.push_back(1);
    }

    if(cntSuff[1]==n/2+1)
    {
        aux={0};
        while(true)
        {
            if(isSubsequence(aux)==1)
                cntSuff[0]++;
            else
                break;
            aux.push_back(0);
        }

        cntSuff[1]=n-cntSuff[0];
    }
    else
    {
        cntSuff[0]=n-cntSuff[1];
    }

    while((int)ans.size()<n)
    {
        if(cntPref[0]+1+cntSuff[1]<cntPref[1]+1+cntSuff[0])
        {
            aux.clear();
            for(int i=1; i<=cntPref[0]+1; i++)
                aux.push_back(0);
            for(int i=1; i<=cntSuff[1]; i++)
                aux.push_back(1);

            if(isSubsequence(aux)==1)
                ans.push_back(0);
            else
                ans.push_back(1);
        }
        else
        {
            aux.clear();
            for(int i=1; i<=cntPref[1]+1; i++)
                aux.push_back(1);
            for(int i=1; i<=cntSuff[0]; i++)
                aux.push_back(0);

            if(isSubsequence(aux)==1)
                ans.push_back(1);
            else
                ans.push_back(0);
        }

        cntPref[ans.back()]++;
        cntSuff[ans.back()]--;
    }

    return ans;
}

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: 20 / 20
• Subtask 2: 80 / 80