Submission #832695

#	Time	Username	Problem	Language	Result	Execution time	Memory
832695		kamelfanger83	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <vector>
#include <string>

using namespace std;

string guess_sequence(int N){
    bool f = press("ab"), s = press("ax");
    string res;
    if (f && s) res = "a";
    else if (f) res = "b";
    else if (s) res = "x";
    else res = "y";
    vector<string> lchars;
    for (auto c : {'a', 'b', 'x', 'y'}) if (c != res[0]) lchars.push_back("" + c);
    while (res.size() < N){
        int ans = press(res + lchars[0] + lchars[0] + res + lchars[0] + lchars[1] + res + lchars[1] + lchars[0]);
        if (ans == res.size()) res += lchars[2];
        if (ans == res.size() + 1) {
            int sans = press(res + lchars[1] + lchars[1]);
            if (sans == res.size()) res += lchars[0] + lchars[2];
            if (sans == res.size() + 1) res += lchars[1] + lchars[2];
            else res += lchars[1] + lchars[1];
        }
        else {
            int sans = press(res + lchars[0] + lchars[0]);
            if (sans == res.size()) res += lchars[1] + lchars[0];
            if (sans == res.size() + 1) res += lchars[0] + lchars[1];
            else res += lchars[0] + lchars[0];
        }
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:14: error: 'press' was not declared in this scope
    8 |     bool f = press("ab"), s = press("ax");
      |              ^~~~~
combo.cpp:10:14: error: 's' was not declared in this scope
   10 |     if (f && s) res = "a";
      |              ^
combo.cpp:16:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |     while (res.size() < N){
      |            ~~~~~~~~~~~^~~
combo.cpp:18:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         if (ans == res.size()) res += lchars[2];
      |             ~~~~^~~~~~~~~~~~~
combo.cpp:19:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         if (ans == res.size() + 1) {
      |             ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |             if (sans == res.size()) res += lchars[0] + lchars[2];
      |                 ~~~~~^~~~~~~~~~~~~
combo.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             if (sans == res.size() + 1) res += lchars[1] + lchars[2];
      |                 ~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |             if (sans == res.size()) res += lchars[1] + lchars[0];
      |                 ~~~~~^~~~~~~~~~~~~
combo.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             if (sans == res.size() + 1) res += lchars[0] + lchars[1];
      |                 ~~~~~^~~~~~~~~~~~~~~~~