Educational Codeforces Round 90 (Rated for Div. 2)(A, B, C, D, E)

Educational Codeforces Round 90 (Rated for Div. 2) Donut Shops 思路 分三种状况:html a = = c / b a == c / b a==c/b这个时候两个的单价是相同的,若是 b = = 1 b == 1 b==1,也就是 a = = c a == c a==c,不管买多少数量的东西,这两个的价格都是同样的,直接输出"-1 -1
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