Submission #734474

#	Time	Username	Problem	Language	Result	Execution time	Memory
734474		JakobZorz	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"

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:4:10: error: 'vector' is not a member of 'std'
    4 |     std::vector<char> c;
      |          ^~~~~~
combo.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include "combo.h"
  +++ |+#include <vector>
    2 | 
combo.cpp:4:17: error: expected primary-expression before 'char'
    4 |     std::vector<char> c;
      |                 ^~~~
combo.cpp:8:13: error: 'c' was not declared in this scope
    8 |             c = {'B', 'X', 'Y'};
      |             ^
combo.cpp:11:13: error: 'c' was not declared in this scope
   11 |             c = {'A', 'X', 'Y'};
      |             ^
combo.cpp:16:13: error: 'c' was not declared in this scope
   16 |             c = {'A', 'B', 'Y'};
      |             ^
combo.cpp:19:13: error: 'c' was not declared in this scope
   19 |             c = {'A', 'B', 'X'};
      |             ^
combo.cpp:24:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   24 |     while(prefix.size() != N) {
      |           ~~~~~~~~~~~~~~^~~~
combo.cpp:25:27: error: 'c' was not declared in this scope
   25 |         if(press(prefix + c[0] + prefix + c[1]) > prefix.size()) {
      |                           ^