Two sensors are used to record a sequence of data points. You are given two integer arrays sensor1 and sensor2 of identical length, representing the recorded values.

Exactly one of the sensors might be faulty. A faulty sensor drops exactly one measurement from the stream. As a result, all remaining data points following the dropped value are shifted left by $1$ position, and an arbitrary value is appended to the end of that array.

Return $1$ if sensor1 is the faulty sensor, or $2$ if sensor2 is the faulty sensor. If it cannot be definitively determined which sensor is faulty, return $-1$.

Constraints:

• sensor1.length $=$ sensor2.length

• $1 \leq$ sensor1.length $\leq 100$

• $1 \leq$ sensor1[i], sensor2[i] $\leq 100$

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.