Find element index or return -1

Summary

Find the first index of a target in a list, or return -1 if it isn't present.

Problem statement

Write a function find_index_or_minus_one(lst, target) that searches lst for target and returns the index of the first occurrence. If target is not present, return -1. Do not raise exceptions for missing elements.

Task

Implement a function that returns the index of the first occurrence of target in a list, or -1 when the target is not found.

Examples

Input format

A function call: find_index_or_minus_one(lst, target)

Output format

Return an integer index (or -1 if not found).

Constraints

Use linear search (O(n)). The list may contain mixed types; equality comparison should be used.

Samples