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문제링크 : https://www.acmicpc.net/problem/9613 제출링크 : https://www.acmicpc.net/source/19844531 CPP 소스 : https://github.com/skysign/WSAPT/blob/master/BOJ/9613%EB%B2%88%20GCD%20%ED%95%A9/9613%EB%B2%88%20GCD%20%ED%95%A9.cpp