Kyselyt

#include <iostream>
#include <string>
#include <cmath>
#include <sstream>

using namespace std;

unsigned getDigits (unsigned int value) {
    return value > 0 ? (int) log10 ((double) value) + 1 : 1;
}

int main() {
	int amount;
	cin >> amount;
	int *a = new int[amount];
	int cur;
	long index;
	int aIndex;
	int digits;
	int size;
	for (int i = 0; i < amount; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < amount; i++) {
		cur = a[i];
		index = 0;
		aIndex = 0;
		size = 0;
		stringstream ss ("0");

		while (size <= cur) {
			aIndex -= ss.str().size();
			ss.str("");
			ss << index;
			digits = getDigits(index);
			size += digits;
			aIndex += digits;
			index++;
		}

		cout << ss.str().at(aIndex) << '\n';
	}
	//while (1);
	return 0;
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 3

Group: 3

Verdict: TIME LIMIT EXCEEDED