coder0687's blog

By coder0687, history, 4 weeks ago, In English

Given A, B, C, D. Find $$$\sum\limits_{i = A}^B \sum\limits_{j = C}^D i⊕j$$$

Constraints:

1 <= A <= B <= $$$10^9$$$

1 <= C <= D <= $$$10^9$$$

How to approach this, any suggestion will be helpful?

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4 weeks ago, # |
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Use these

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4 weeks ago, # |
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Here is my idea —

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