Kyselyt

input/code.cpp: In function 'int main()':
input/code.cpp:31:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (pos = 0; pos < starts.size(); pos++)
                                   ^

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

int main()
{
	int count;
	std::vector<long> starts;

	long tmp = 90;
	long tmp2 = 10;
	starts.push_back(1);
	for (int i = 2; i < 20; i++)
	{
		starts.push_back(tmp2);
		tmp2 += i * tmp;
		tmp *= 10;
	}

	std::cin >> count;

	while (count-- > 0)
	{
		long number;

		std::cin >> number;

		int pos;
		for (pos = 0; pos < starts.size(); pos++)
		{
			if (starts[pos] > number)
			{
				pos--;
				break;
			}
		}

		long enumber = number - starts[pos];
		long innum = enumber % (pos + 1);
		long start = enumber / (pos + 1);
		long num = (long)pow(10, pos) + start;

//		std::cout << enumber << " " << num << " " << pos << " " << start << " " << innum << std::endl;

		std::ostringstream outs;
		outs << num;

		std::cout << outs.str()[innum] << std::endl;
	}

	return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED