문제
두 자연수 A, B가 주어졌을 때, A + N과 B + N의 최소공배수가 최소가 되는 자연수 N을 구하시오.
출력
첫째 줄에 N을 출력한다. 만약 답이 여러 개라면 그 중 가장 작은 것을 출력한다.
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