## Problem

Given an array of integers, return **indices** of the two numbers such that they add up to a specific target.

You may assume that each input would have *exactly* one solution, and you may not use the same element twice.

## Example

1 | Given nums = [2, 7, 11, 15], target = 9, |

## Python

1 | class Solution(object): |

## C++

1 | class Solution { |

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