Write a function to find out how many days does it take a virus to exceed the given number?
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A virus doubles every day. There is only 1 virus in the first day. After each day, it doubles. 1st day - 1 2nd day - 2 3rd day - 4 4th day - 8 5th day - 16 You should find how many days does it take to exceed the given number. Input: 10 Output: 5 This way of growth is also called Exponential growth.