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An ordinary problem with an extraordinary(maybe) complexity! Help needed!
Suppose an array contains n elements. We want to know, for every element in the array, the position of the leftmost element that is smaller than that one.
An example:
Position: 1 2 3 4 5 6 7 The array: 20 3 10 5 1 9 100 Answer: 0 0 2 2 0 2 1
Can this problem be done in O(n)?
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en4 |
|
Tribbiani | 2017-07-12 16:22:43 | 47 | ||
| en3 |
|
Tribbiani | 2017-07-12 16:22:10 | 4 | ||
| en2 |
|
Tribbiani | 2017-07-12 16:15:09 | 39 | Tiny change: 'elements. We want ' -> 'elements. The elements is in the range $10^{9}$. We want ' | |
| en1 |
|
Tribbiani | 2017-07-12 16:10:21 | 418 | Initial revision (published) |
