--     Author: Rodney Shaghoulian
--     Github: github.com/RodneyShag
-- HackerRank: hackerrank.com/RodneyShag

SELECT
    ROUND(SQRT(
        POWER(MAX(LAT_N)  - MIN(LAT_N),  2)
      + POWER(MAX(LONG_W) - MIN(LONG_W), 2)
    ), 4)
FROM 
    STATION;