Thirsty Elephant

An elephant is very thirsty and needs to drink 20 liters of water to quench its thirst. However, the only available container is a small cylindrical bucket with a height of h centimeters and a base radius of r centimeters (both are integers). The volume of the bucket is calculated using the formula: \( V = \pi \times r^2 \times h \) (in cubic centimeters), where \( \pi \) is approximated as 3.14. Note that 1 liter = 1000 cubic centimeters. Your task is to determine the minimum number of buckets the elephant must drink so that the total water volume is at least 20 liters.

inputFormat

The input consists of two space-separated integers, h and r, representing the height (in centimeters) and the base radius (in centimeters) of the bucket.

outputFormat

Output a single integer representing the minimum number of buckets the elephant has to drink to reach at least 20 liters of water.

sample

10 5

26