Neighborhood Burglary

You plan to rob houses in a street where each house stores a certain amount of money. The neighborhood has a security system that sets off an alarm when two adjacent houses are robbed. Return the maximum amount of cash that can be stolen without triggering the alarms.

Example:

Input: houses = [200, 300, 200, 50]
Output: 400

Explanation: Stealing from the houses at indexes 0 and 2 yields 200 + 200 = 400 dollars.