Kyselyt

#include <bits/stdc++.h>

#define N (1<<19)
#define ll long long
#define ld long double
#define M 1000000007
#define INF 0x5ADFACE5
#define LINF 0x51DEEFFEC7C0DECALL
#define pii pair<int, int>
#define pll pair<long long, long long>
#define F first
#define S second

using namespace std;

int main () {
	int n;
	cin>>n;
	for (int i = 0; i < n; i++) {
		ll k;
		cin>>k;
		ll c = 0;
		ll m = 1;
		ll x = 1;
		while (c + 9 * m < k) {
			c += 9 * m;
			k -= 9 * m * x;
			m *= 10;
			x++;
		}
		k--;
		m += k / x;
		string s = to_string(m);
		cout<<s[k % x]<<endl;
	}
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER

Test 3

Group: 3

Verdict: WRONG ANSWER