题解 | 构造C的歪
构造C的歪
https://www.nowcoder.com/practice/56735b3fe2fc4ed5916f5427dc787156
a,b = map(int,input().split()) print(2*b-a)
构造C的歪
https://www.nowcoder.com/practice/56735b3fe2fc4ed5916f5427dc787156
a,b = map(int,input().split()) print(2*b-a)
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