Submission #734475

#	Time	Username	Problem	Language	Result	Execution time	Memory
734475		JakobZorz	Combo (IOI18_combo)	C++14	30 / 100	80 ms	448 KiB

combo

#include "combo.h"
#include <vector>

std::string guess_sequence(int N) {
    std::vector<char> c;
    std::string prefix;
    if(press("AB") != 0) {
        if(press("A") != 0) {
            c = {'B', 'X', 'Y'};
            prefix = "A";
        } else {
            c = {'A', 'X', 'Y'};
            prefix = "B";
        }
    } else {
        if(press("X") != 0) {
            c = {'A', 'B', 'Y'};
            prefix = "X";
        } else {
            c = {'A', 'B', 'X'};
            prefix = "Y";
        }
    }
    
    while(prefix.size() != N) {
        if(press(prefix + c[0] + prefix + c[1]) > prefix.size()) {
            if(press(prefix + c[0]) > prefix.size()) {
                prefix += c[0];
            } else {
                prefix += c[1];
            }
        } else {
            prefix += c[2];
        }
    }
    
    return prefix;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:25:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     while(prefix.size() != N) {
      |           ~~~~~~~~~~~~~~^~~~
combo.cpp:26:49: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         if(press(prefix + c[0] + prefix + c[1]) > prefix.size()) {
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:27:37: 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(press(prefix + c[0]) > prefix.size()) {
      |                ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95