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All leaked interview problems are collected from Internet.

All leaked interview problems are collected from Internet.

Given a **set** of candidate numbers (** C**)

The **same** repeated number may be chosen from ** C** unlimited number of times.

**Note:**

- All numbers (including target) will be positive integers.
- The solution set must not contain duplicate combinations.

For example, given candidate set `[2, 3, 6, 7]`

and target `7`

,

A solution set is:

[ [7], [2, 2, 3] ]

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