Kyselyt

/*
#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)
	{
		lastChar = ' ';
		output = "";
		deleteNext = false;
		modified = false;
		for (unsigned int i = 0; i < input.length(); i++)
		{
			if (i != 0)
			{
				if (input[i] == lastChar && (!modified || deleteNext))
				{
					if (!deleteNext)
					{
						output.pop_back();
						deleteNext = true;
						modified = true;
					}
				}
				else
				{
					deleteNext = false;
					output += input[i];
					lastChar = input[i];
				}
			}
			else
			{
				lastChar = input[i];
				output += input[i];
			}
		}
		if (!modified || output.length() <= 0)
		{
			modifyDone = true;
		}
		else
		{
			input = output;
		}
	}
	cout << output << "\n";

	int a;
	cin >> a;

	return 0;
}*/
//Tehtävä 1

/*
#include <iostream>
#include <string>
#include <math.h>

using namespace std;

int main()
{
unsigned int q = 0;
cin >> q;

string input[512];
string output[512];
input[0] = "#";
output[0] = "#";

for (unsigned int i = 2; i <= q; i++)
{
unsigned int power = pow(2, i - 1);
for (unsigned int o = 0; o < power / 2; o++)
{
output[o] = input[o] + input[o];
}
for (unsigned int o = power / 2; o < power; o++)
{
output[o] = input[o - (power / 2)];
for (unsigned int p = 0; p < power / 2; p++)
{
if (output[o][p] == '#')
{
output[o] += ".";
}
else
{
output[o] += "#";
}
}
}
for (unsigned int o = 0; o < output->size(); o++)
{
input[o] = output[o];
}
}

for (int i = 0; i < pow(2, q - 1); i++)
{
cout << output[i] << "\n";
}

int a;
cin >> a;

return 0;
}*/
//Tehtävä 2


#include <iostream>
#include <string>
#include <vector>
#include <math.h>

using namespace std;

int main()
{
	unsigned int q = 0;
	cin >> q;
	for (unsigned int i = 0; i < q; i++)
	{
		unsigned long long int k = 0;
		cin >> k;

		unsigned int num = k;
		unsigned long long int n = 0;
		while (num > 0)
		{
			num = num / 10;
			n++;
		}
		unsigned long long int nums = 0;
		string numsBefore = "0";
		if (n > 1)
		{
			numsBefore = "9";
			for (unsigned long long int o = 1; o < n; o++)
			{
				if (nums + o * 9 * pow(10, o - 1) < k)
				{
					nums += o * 9 * pow(10, o - 1);
					numsBefore += "9";
				}
				else
				{
					break;
				}
			}
		}
		string::size_type sz;
		unsigned long long int output = ((k - nums) / n) + stoi(numsBefore, &sz);;

		vector<unsigned int> digits;
		unsigned long long int lK = output;
		while (lK > 0)
		{
			digits.push_back(lK % 10);
			lK /= 10;
		}
		unsigned int mod = ((k - nums) % n);

		output = digits[mod];

		cout << output << "\n";
	}

	int a;
	cin >> a;

	return 0;
}
//Tehtävä 3

/*
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main()
{
	string rows[10];
	for (int i = 0; i < 10; i++)
	{
		for (int o = 0; o < 10; o++)
		{
			int n = i + o;
			if (n > 9)
			{
				n -= 10;
			}
			rows[i] += to_string(n);

			
			n = o - i;
			if (n < 0)
			{
				n += 10;
			}

			if (n == 0)
			{
				rows[i] += "A";
			}
			else if (n == 1)
			{
				rows[i] += "B";
			}
			else if (n == 2)
			{
				rows[i] += "C";
			}
			else if (n == 3)
			{
				rows[i] += "D";
			}
			else if (n == 4)
			{
				rows[i] += "E";
			}
			else if (n == 5)
			{
				rows[i] += "F";
			}
			else if (n == 6)
			{
				rows[i] += "G";
			}
			else if (n == 7)
			{
				rows[i] += "H";
			}
			else if (n == 8)
			{
				rows[i] += "I";
			}
			else if (n == 9)
			{
				rows[i] += "J";
			}
			if (o != 9)
			{
				rows[i] += " ";
			}
		}
		cout << rows[i] << "\n";
	}

	ofstream myfile;
	myfile.open("Eppapeli.txt");
	if (myfile.is_open())
	{
		for (int i = 0; i < 10; i++)
		{
			if (i != 10 - 1)
			{
				myfile << rows[i] + "\n";
			}
			else
			{
				myfile << rows[i];
			}
		}
		myfile.close();
	}

	int a;
	cin >> a;

	return 0;
}*/
//Tehtävä 5

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER

Test 3

Group: 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi