Submission #132097

#	Time	Username	Problem	Language	Result	Execution time	Memory
132097		Tuk1352	Combo (IOI18_combo)	C++11	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>

using namespace std;

int press(string p)
{
    int r;
    cout << p << endl;
    cin >> r;
    return r;
}

string guess_sequence(int N)
{
    int r;
    string s1, s2, s3, s4, s, S;
    map <int, char> Ma;
    Ma[0] = 'A';
    Ma[1] = 'B';
    Ma[2] = 'X';
    Ma[3] = 'Y';
    s = "AB";
    r = press(s);
    if (r >= 1)
    {
        s = "A";
        r = press(s);
        if (r == 0)
        {
            Ma[1] = 'A';
            Ma[0] = 'B';
            S = "B";
        }
        else
        {
            S = "A";
        }
    }
    else
    {
        s = "X";
        r = press(s);
        if (r == 1)
        {
            Ma[0] = 'X';
            Ma[2] = 'A';
            S = "X";
        }
        else
        {
            Ma[0] = 'Y';
            Ma[3] = 'A';
            S = "Y";
        }
    }
    for (int i = 1; i < N-1; i++)
    {
        s1 = S + Ma[1];
        s2 = S + Ma[2] + Ma[1];
        s3 = S + Ma[2] + Ma[2];
        s4 = S + Ma[2] + Ma[3];
        s = s1 + s2 + s3 + s4;
        r = press(s);
        if (r == S.length())
        {
            S += Ma[3];
        }
        else if (r == S.length() + 1)
        {
            S += Ma[1];
        }
        else
        {
            S += Ma[2];
        }
    }
    s = S + Ma[1];
    r = press(s);
    if (r == N)
    {
        S += Ma[1];
        return S;
    }
    s = S + Ma[2];
    r = press(s);
    if (r == N)
    {
        S += Ma[2];
        return S;
    }
    S += Ma[3];
    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:64:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         if (r == S.length())
      |             ~~^~~~~~~~~~~~~
combo.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         else if (r == S.length() + 1)
      |                  ~~^~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccFAYdAj.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/ccz99byk.o:combo.cpp:(.text+0x270): first defined here
collect2: error: ld returned 1 exit status