Submission #585276

#	Time	Username	Problem	Language	Result	Execution time	Memory
585276		haxorman	Combo (IOI18_combo)	C++14	10 / 100	48 ms	568 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;
		for (int i = 0; i < 2; ++i) {
			guess += s + letters[i];
		}
		
		//cout << s << ' ' << guess << "\n";
		int coins = press(guess);
		if (coins == s.size()) {
			s += letters[2];
		}
		else {
			guess = s + letters[0];
			
			coins = press(guess);
			if (coins == s.size()) {
				s += letters[1];
			}
			else {
				s += letters[0];
			}
		}
	}
	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:33:13: 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 (coins == s.size()) {
      |       ~~~~~~^~~~~~~~~~~
combo.cpp:40:14: 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()) {
      |        ~~~~~~^~~~~~~~~~~

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