Competitions

# Functions

# Angles of triangle

The triangle is given. Find the value of its biggest angle.

#### Input

The coordinates of triangle vertices are given. The coordinates of a vertex is a pair of integers not greater than `10`

by absolute value.^{4}

#### Output

Print the value of its biggest angle in degrees with **6** decimal digits.

Input example #1

0 0 3 0 0 4

Output example #1

90.000000