Определить k цифру, если известно, что k – четное (нечетное) число

k = int(input())
if k >= 1 and k <= 180:
   if k%2 == 0:
      print(k // 2 - 1)
   elif k%2 > 0:
      print (k // 20 + 1)

b=''
for i in range(10, 100):
    b += str(i)
print(b[int(input())-1])

res = []
for k in range(1, 181):
   if k%2 == 0:
      res.append(k // 2 - 1)
   else:
      res.append(k // 20 + 1)
print(res)
 # [1, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 2, 10, 2, 11, 2, 12, 2, 13, 2, 14, 2, 15, 2, 16, 2, 17, 2, 18, 2, 19, 3, 20, 3, 21, 3, 22, 3, 23, 3, 24, 3, 25, 3, 26, 3, 27, 3, 28, 3, 29, 4, 30, 4, 31, 4, 32, 4, 33, 4, 34, 4, 35, 4, 36, 4, 37, 4, 38, 4, 39, 5, 40, 5, 41, 5, 42, 5, 43, 5, 44, 5, 45, 5, 46, 5, 47, 5, 48, 5, 49, 6, 50, 6, 51, 6, 52, 6, 53, 6, 54, 6, 55, 6, 56, 6, 57, 6, 58, 6, 59, 7, 60, 7, 61, 7, 62, 7, 63, 7, 64, 7, 65, 7, 66, 7, 67, 7, 68, 7, 69, 8, 70, 8, 71, 8, 72, 8, 73, 8, 74, 8, 75, 8, 76, 8, 77, 8, 78, 8, 79, 9, 80, 9, 81, 9, 82, 9, 83, 9, 84, 9, 85, 9, 86, 9, 87, 9, 88, 9, 89]

k = int(input())
if k%2:
    print ((k//2+10)//10)
else:      
    print((k//2+9)%10)

def c(k):
    if k%2 == 0:
        return (k // 2 - 1) % 10
    else:
        return k // 20 + 1 
 
b=''
for i in range(10, 100):
    b += str(i)
 
for k in range(1, 181):
    if b[k-1] != str(c(k)):
        print(k, b[k-1], c(k))