Merkkijono

/*
#include <iostream>
#include <string>
 
using namespace std;
 
int main()
{
	for (int i = 0; i < 10; i++)
	{
		string curRow = "";
 
		for (int o = 0; o < 10; o++)
		{
			int n = i + o;
			if (n > 9)
			{
				n -= 10;
			}
			curRow += to_string(n);
 
			n = o - i;
			if (n < 0)
			{
				n += 10;
			}
 
			if (n == 0)
			{
				curRow += "A ";
			}
			else if (n == 1)
			{
				curRow += "B ";
			}
			else if (n == 2)
			{
				curRow += "C ";
			}
			else if (n == 3)
			{
				curRow += "D ";
			}
			else if (n == 4)
			{
				curRow += "E ";
			}
			else if (n == 5)
			{
				curRow += "F ";
			}
			else if (n == 6)
			{
				curRow += "G ";
			}
			else if (n == 7)
			{
				curRow += "H ";
			}
			else if (n == 8)
			{
				curRow += "I ";
			}
			else if (n == 9)
			{
				curRow += "J ";
			}
		}
 
		cout << curRow << "\n";
	}
 
	int a;
	cin >> a;
 
	return 0;
}*/
//Teht�v� 5
 
#include <iostream>
#include <string>
 
using namespace std;
 
int main()
{
	string input = "";
	cin >> input;
 
	bool modifyDone = false, modified = false, deleteNext = false;
	string output = "";
	char lastChar = ' ';
	while (!modifyDone)
	{
		output = "";
		deleteNext = false;
		modified = false;
		for (unsigned int i = 0; i < input.length(); i++)
		{
			if (i != 0) {
				if (input[i] == lastChar && (deleteNext || !modified))
				{
					output.pop_back();
					deleteNext = true;
					modified = true;
				}
				else if (deleteNext)
				{
					output.pop_back();
					deleteNext = false;
					modified = true;
				}
			}
			if (input[i] != lastChar || i != input.length() - 1)
			{
				output += input[i];
			}
			lastChar = input[i];
		}
		if (!modified)
		{
			modifyDone = true;
		}
		else
		{
			input = output;
			cout << output << "\n";
		}
	}
 
	int a;
	cin >> a;
 
	return 0;
}
//Teht�v� 1

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER