n = eval(input())N = abs(n)if n < 0: a = -abs(N + 10) b = -abs(N - 10) c = -abs(N * 10)else: a = abs(N + 10) b = abs(N - 10) c = abs(N * 10)print(N, a , b, c)
同符号数学运算
原文：https://www.cnblogs.com/lzw2019114243036/p/15260342.html
