Submission #348545

#	Time	Username	Problem	Language	Result	Execution time	Memory
348545		Halogen	Combo (IOI18_combo)	C++14	30 / 100	67 ms	556 KiB

combo

#include "combo.h"

std::string guess_sequence(int N) {
	char lst[4] = {'A', 'B', 'X', 'Y'};
  std::string p = "";
  int first = 4;

	for (int j = 0; j < N; j++) {
    if (press(p + lst[0] + p + lst[1]) >= p.size() + 1) {
        if (press(p + lst[0]) == p.size() + 1) p += lst[0];
        else p += lst[1];
    }
    else if (press(p + lst[2]) == p.size() + 1) p += lst[2];
    else p += lst[3];
	}

	return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     if (press(p + lst[0] + p + lst[1]) >= p.size() + 1) {
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:10:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         if (press(p + lst[0]) == p.size() + 1) p += lst[0];
      |             ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:13:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     else if (press(p + lst[2]) == p.size() + 1) p += lst[2];
      |              ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:6:7: warning: unused variable 'first' [-Wunused-variable]
    6 |   int first = 4;
      |       ^~~~~

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