문제 링크 https://www.acmicpc.net/problem/6850 6850번: Cows The first line of input contains a single integer, n (1 ≤ n ≤ 10000), containing the number of trees that grow on the available land. The next n lines contain the integer coordinates of each tree given as two integers x and y separated by one space (wh www.acmicpc.net 문제 Your friend to the south is interested in building fences and turning p..