Submission #436382

#	Time	Username	Problem	Language	Result	Execution time	Memory
436382		stoyan_malinin	Combo (IOI18_combo)	C++14	10 / 100	89 ms	444 KiB

combo

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

#include "combo.h"
#ifdef __LOCAL
#include "grader.cpp"
#endif // __LOCAL

using namespace std;

char extend(string &ans)
{
    const vector <char> options = {'A', 'B', 'X', 'Y'};

    for(char c: options)
    {
        if(ans.size()!=0 && ans[0]==c) continue;
        if(press(ans+c)==ans.size()+1) return c;
    }
}

string guess_sequence(int N)
{
    string ans = "";
    for(int i = 0;i<N;i++) ans += extend(ans);

    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'char extend(std::string&)':
combo.cpp:19:24: 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(press(ans+c)==ans.size()+1) return c;
      |            ~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:14:54: warning: control reaches end of non-void function [-Wreturn-type]
   14 |     const vector <char> options = {'A', 'B', 'X', 'Y'};
      |                                                      ^

• Subtask 1: 5 / 5
• Subtask 2: 5 / 95