Submission #154039

#	Time	Username	Problem	Language	Result	Execution time	Memory
154039		mohamedsobhi777	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"

using namespace std;

std::string guess_sequence(int N) {
    string ret = "";
    string chs = "ABXY";

    if( pres("XY") )
    {
        if(pres("X"))ret = "X" , chs = "ABY";
        else ret = "Y" , chs = "ABX";
    }
    else
    {
        if(pres("A"))ret = "A" , chs = "BXY";
        else ret = "B" , chs ="AXY";
    }

    for(int i = 1;i<N;i++)
    {
        bool ok = 0;
        for(int j = 0;j<2;j++)
        {
            string ask = ret;
            ask+=chs[j];
            if( press( ask ) ==i+1 )
            {
                ret+=chs[j];
                ok = 1;
                break;
            }
        }
        if(ret.size()==i)
            ret+=chs[2];
    }
    return ret;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:9: error: 'pres' was not declared in this scope; did you mean 'press'?
    9 |     if( pres("XY") )
      |         ^~~~
      |         press
combo.cpp:34:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |         if(ret.size()==i)
      |            ~~~~~~~~~~^~~