Submission #203891

#	Time	Username	Problem	Language	Result	Execution time	Memory
203891		V003	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int n)
{
    char c[4]={'A', 'B', 'X', 'Y'};
    string s="";
    int x;
    if(press("AB">=1)) x=(press("A"))!=1;
    else x=2+(press("X")<1);
    s+=c[x];
    if(n==1)
        return s;
    swap(c[x], c[3]);
    for(int i=1; i<n-1; i++)
    {
        x=press(s+c[0]+c[0]+s+c[0]+c[1]+s+c[0]+c[2]+s+c[1]);
        if(x==i+1) s+=c[1];
        if(x==i+2) s+=c[0];
        if(x==i) s+=c[2];
    }
    if(press(s+c[0]+s+c[1])==n)
    {
        if(press(s+c[0])==n)
            s+=c[0];
        else
            s+=c[1];
    }
    else
        s+=c[2];
   return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:18: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    9 |     if(press("AB">=1)) x=(press("A"))!=1;
      |              ~~~~^~~
combo.cpp:9:18: error: could not convert '(((const char*)"AB") >= ((const char*)1))' from 'bool' to 'std::string' {aka 'std::__cxx11::basic_string<char>'}