Submission #639888

#	Time	Username	Problem	Language	Result	Execution time	Memory
639888		haxorman	Combo (IOI18_combo)	C++14	0 / 100	0 ms	208 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int N) {
	string s;
	vector<string> letters = {"A", "B", "X", "Y"};
	for (string c : letters) {
		s += c;
 
		int coins = press(s);
		if (coins == s.size()) {
			break;
		}
		s.pop_back();
	}
 
	for (int i = 0; i < 4; ++i) {
		if (letters[i].back() == s.back()) {
			letters.erase(letters.begin() + i);
			break;
		}
	}

	while (s.size() < N) {
		string guess;
		guess += s + letters[0];

		if (s.size() < N - 1) {
			for (int i = 0; i < 3; ++i) {
				guess += s + letters[1] + letters[i];
			}
		}
		else {
			guess += s + letters[1];
		}
		
		//cout << s << ' ' << guess << "\n";
		int coins = press(guess);
		if (coins == s.size()) {
			s += letters[2];
		}
		else if (s.size() == N - 1) {
			guess = s + letters[0];

			coins = press(guess);
			if (coins == s.size()) {
				s += letters[1];
			}
			else {
				s += letters[0];
			}
		}
		else if (coins == s.size() + 1) {
			s += letters[0];
		}
		else {
			s += letters[1];
		}
	}
	cout << s << "\n";
	return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:12:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |   if (coins == s.size()) {
      |       ~~~~~~^~~~~~~~~~~
combo.cpp:25:18: 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 (s.size() < N) {
      |         ~~~~~~~~~^~~
combo.cpp:29:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |   if (s.size() < N - 1) {
      |       ~~~~~~~~~^~~~~~~
combo.cpp:40:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   if (coins == s.size()) {
      |       ~~~~~~^~~~~~~~~~~
combo.cpp:43:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |   else if (s.size() == N - 1) {
      |            ~~~~~~~~~^~~~~~~~
combo.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |    if (coins == s.size()) {
      |        ~~~~~~^~~~~~~~~~~
combo.cpp:54:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   else if (coins == s.size() + 1) {
      |            ~~~~~~^~~~~~~~~~~~~~~

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