Class 101

International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a"maps to ".-", "b" maps to "-...", "c" maps to "-.-.", and so on.

題目：

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.

題目大意：

給予一串數值陣列，以及一個目標值。得到兩個陣列索引位子，而該索引位子的數值相加會等於目標值。

並且給予的數值陣列只可查訪一次，不可多次查訪。