Kyselyt

def initList():
	b = []

	for x in range(0, 10**7):
		b.append(str(x))

	return ''.join(b)

def genMinDict(n=18):
	mindict = []
	base = 1 
	for i in range(1, n+1):
		base = base + 9 * (10**(i-1)) * i
		mindict.append(base)
	return(mindict)

def magnitudeGet(n):

	for ii in range(0, len(md)-1):
		if(md[ii] <= n < md[ii+1]): return ii+2

#a = initList()
md = genMinDict()

for kek in range(0, int(input())):
	inp = int(input())
	if(inp < 10):
		print(inp)
		continue
	d = magnitudeGet(inp)

	base = 1
	if (d > 1):
		for i in range(1, d):
			base = base + 9 * (10**(i-1)) * i
		#print (str(base))
	i = inp 
	ans = (10**(d-1)) + (i - base)//d
	num = str(ans)
	#print (a[i] + ", " + num[((i % d)+d) % d-(base % d)])
	print(num[((i % d)+d) % d-(base % d)])

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED