RoboContest

A
10
B
10
C
10
D
10
E
10
F
10
G
10
H
10
I
10
J
10
K
10
L
10
M
10
N
10
O
10
P
10
Q
10

Masala P

Xotira 16 MB Vaqt 1000 ms
14
Muallif: Oromov Akobir

Eng yaqin tub son

Sizga nn soni beriladi. nn soniga eng yaqin tub sonni chop eting. Ular 2 ta bo’lsa, ikkovini ham chop eting.

Eng yaqin son deb kiritigan son bilan absolut ayirmasi eng kichik tub songa teng bo'lgan songa aytiladi

Kiruvchi ma'lumotlar:

Bitta butun son k(1≤k≤109)k (1 \le k \le 10^9) beriladi.

Chiquvchi ma'lumotlar:

Masala javobini chiqaring.

Misollar
# input.txt output.txt
1 
12
 
11 13
2 
27
 
29
3 
80
 
79

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