Défi de programmation First Negative Index

Problème

Find the position (counting from 0) of the first negative number in the list.

Implement first_negative_index(numbers).

numbers: The list of integers.

Return the index, or -1 if there are no negative numbers.

0 ≤ length ≤ 100,000

Exemple 1

Entrée :
numbers = [4, 0, -2, -7]

Sortie attendue :
expected = 2

Entrée :
std::vector<long long> numbers = {4, 0, -2, -7};

Sortie attendue :
long long expected = 2;

Entrée :
long[] numbers = new long[] {4, 0, -2, -7};

Sortie attendue :
long expected = 2;

-2 at index 2 is the first negative value.

Exemple 2

Entrée :
numbers = [1, 2, 3]

Sortie attendue :
expected = -1

Entrée :
std::vector<long long> numbers = {1, 2, 3};

Sortie attendue :
long long expected = -1;

Entrée :
long[] numbers = new long[] {1, 2, 3};

Sortie attendue :
long expected = -1;

There are no negative numbers, so the answer is -1.

Ce défi a été adapté pour CodeUtility. Suivez l'énoncé et les contraintes ci-dessus.