Kyselyt

#include <iostream>
#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;
	int index;
	int size;
	int digits;
	int minus;
	for (int i = 0; i < amount; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < amount; i++) {
		cur = a[i];
		index = 0;
		size = 0;
		digits = 0;
		minus = 1;
		stringstream ss;

		for (; size <= cur; index++) {
			digits = getDigits(index);
			if (size + digits < cur) {
				minus += digits;
			}
			size += digits;
		}
		ss << index - 1;
		cout << ss.str().at(cur - minus) << '\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