题解 | #牛牛的等差数列#
牛牛的等差数列
https://www.nowcoder.com/practice/fb9daba67b88437a9e501adf020d425e
a,b=map(int,input().split()) c=b-a+b print(c)
牛牛的等差数列
https://www.nowcoder.com/practice/fb9daba67b88437a9e501adf020d425e
a,b=map(int,input().split()) c=b-a+b print(c)
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