# Python

```import fileinput

for line in fileinput.input():
pass
```

Fileinput will run over all lines in the input; it takes the files given as command-line arguments, or if missing, the standard input.

## Geo calculations

```def Rad2Deg(x):
return x * (180/math.pi)

"Radius of curvature in meters at specified latitude."
a = 6378.137
e2 = 0.081082 * 0.081082
# the radius of curvature of an ellipsoidal Earth in the plane of a
# meridian of latitude is given by
#
# R' = a * (1 - e^2) / (1 - e^2 * (sin(lat))^2)^(3/2)
#
# where a is the equatorial radius,
# b is the polar radius, and
# e is the eccentricity of the ellipsoid = sqrt(1 - b^2/a^2)
#
# a = 6378 km (3963 mi) Equatorial radius (surface to center distance)
# b = 6356.752 km (3950 mi) Polar radius (surface to center distance)
# e = 0.081082 Eccentricity
x = a * (1.0 - e2)
z = 1.0 - e2 * sc * sc
y = pow(z, 1.5)
r = x / y

r = r * 1000.0      # Convert to meters
return r

def EarthDistance((lat1, lon1), (lat2, lon2)):
"Distance in meters between two points specified in degrees."