Mr. Hikiko will react with a “**No Bad**”, if you can solve this problem.

An array is a **Not Bad** array if the sum of all of its element is equal to its length. For example, this array [ 1, -1, 3] is a **Not Bad** array since the sum of its all element which is **3** is equal to its length.

This is a companion discussion topic for the original entry at https://toph.co/p/not-bad-array