백준/18869번/멀티버스 II/골드5
Problem Link: https://www.acmicpc.net/problem/18869
Problem Link: https://www.acmicpc.net/problem/18869
Problem Link: https://www.acmicpc.net/problem/1790
Problem Link: https://www.acmicpc.net/problem/2240
Problem Link: https://school.programmers.co.kr/learn/courses/30/lessons/42860
Problem Link: https://www.hackerrank.com/challenges/magic-square-forming/problem?isFullScreen=true