MathDB

A lattice point is a coordinate pair

(a,b)

where both

a,b

are integers. What is the number of lattice points

(x,y)

that satisfy

\tfrac{x^2}{2017}+\tfrac{2y^2}{2017}<1

and

y\equiv2x\pmod{7}

?
Let

C

be the actual answer,

A

be the answer you submit, and

D=|A-C|

. Your score will be rounded up from

\max(0,25-e^{D/100})

Problem Statement