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说明

Battle小学的书香阁有$n$个座位，已知第一排有$k$个座位，以后每排比上一排增加$2$个座位，最后一排有几个座位？一共有几排？
试编一程序算一算。

输入格式

一行两个整数n,k($1\leq k \leq100, k\le n \le 10^{7}$)。

输出格式

312 15

37
12