Submission #144653

#	Time	Username	Problem	Language	Result	Execution time	Memory
144653		aanji	Combo (IOI18_combo)	C++14	5 / 100	2 ms	256 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;

string guess_sequence(int N)
{
    string s;
    string a="A", b="B", c="X";
    if(press("AB")) {
        if(press("A")) {
            s="A";
            a="Y";
        }
        else {
            b="Y";
            s="B";
        }
    }
    else {
        if(press("X")) {
            c="Y";
            s="X";
        }
        else s="Y";
    }
    while(s.size()<N-1) {
        int k=press(s+a+s+b+a+s+b+b+s+b+c);
        if(k==s.size()) s+=c;
        else if(k==s.size()+1) s+=a;
        else s+=b;
    }
    if(press(s+a)==s.size()+1) return s+a;
    if(press(s+b)==s.size()+1) return s+b;
    return s+c;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |     while(s.size()<N-1) {
      |           ~~~~~~~~^~~~
combo.cpp:29:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         if(k==s.size()) s+=c;
      |            ~^~~~~~~~~~
combo.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         else if(k==s.size()+1) s+=a;
      |                 ~^~~~~~~~~~~~
combo.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     if(press(s+a)==s.size()+1) return s+a;
      |        ~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     if(press(s+b)==s.size()+1) return s+b;
      |        ~~~~~~~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95