Submission #1008451

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008451		nickolasarapidis	Combo (IOI18_combo)	C++17	0 / 100	1 ms	344 KiB

combo

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

string guess_sequence(int N){
	string S;
	char first;

	char buttons[4] = {'A', 'B', 'X', 'Y'};

	for(int i = 0; i < 4; i++){
		if(press("" + buttons[i]) > 0){
			S.push_back(buttons[i]);
			first = buttons[i];
			break;
		}
	}

	for(int i = 0; i < 4; i++){
		if(buttons[i] != first and press(S + buttons[i]) > 0){
			S += buttons[i];
			if(S.size() < 3){
				i = 0;
			}
		}
	}

	return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:20:26: warning: 'first' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |   if(buttons[i] != first and press(S + buttons[i]) > 0){
      |      ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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