[HackerRank] Weather Observation Station 18

https://www.hackerrank.com/challenges/weather-observation-station-18/problem?isFullScreen=true&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen 

Weather Observation Station 18 | HackerRank

 

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Consider P1 (a, b) and  P2(a, b)  to be two points on a 2D plane.

•  a happens to equal the minimum value in Northern Latitude (LAT_N in STATION).
•  b happens to equal the minimum value in Western Longitude (LONG_W in STATION).
•  c happens to equal the maximum value in Northern Latitude (LAT_N in STATION).
•  d happens to equal the maximum value in Western Longitude (LONG_W in STATION).

Query the Manhattan Distance between points P1 and P2 and round it to a scale of 4 decimal places.

Input Format

The STATION table is described as follows:

where LAT_N is the northern latitude and LONG_W is the western longitude.

 

[My Answer]

#ABS함수로 절대값 
#ROUND함수로 소수점

SELECT 
ROUND(ABS(MAX(LAT_N) - MIN(LAT_N)) + ABS(MAX(LONG_W) - MIN(LONG_W)), 4) 
FROM STATION

 

오랜만에 본 manhattan distance... 

좌표에서의 두점 사이의 절대값을 이용한 거리 찾기 

https://ko.wikipedia.org/wiki/%EB%A7%A8%ED%95%B4%ED%8A%BC_%EA%B1%B0%EB%A6%AC

맨해튼 거리 - 위키백과, 우리 모두의 백과사전

 

오랜만에 봐서 신기...