albertas

"""
TASK DEFINITION:

There are street lights placed evenly every 20 meters on a straight road.
Most of the street lights are working and have the same illumination intencity.
Non-working street lights are provided as a list of their indexes.
If a street light is not working - its position can still be illuminated by neighboring lights.
Illumination is decreasing exponentially when the distance increases from a street light.
Please find an index of a street light, which has the lowest illumination. Its light bulb will be replaced.
Notes:

albertas

"""
There are street lights placed evenly every 20 meters on a straight road.
Most of the street lights are working and have the same illumination intencity.
Non-working street lights are provided as a list of their indexes.
If a street light is not working - its position can still be illuminated by neighboring lights.
Illumination is decreasing exponentially when the distance increases from a street light.
Please find an index of a street light, which has the lowest illumination. Its light bulb will be replaced.

Notes:
- The road lenght can be from 0 to 2000000m.