You are given an array of `prices` of different icecreams. But your wallet has `budget` dollars. Find the length of the longest contiguous subarray whose total price would be equal to your `budget`.\n\n**Example 1:**\n```\nInput: prices = [2, 5, 7, 8, 9, 18, 2, 2], budget = 14\nOutput 3\nExplanation: 2 + 5 + 7 = 14\n```

You are given an array of prices of different icecreams. But your wallet has budget dollars. Find the length of the longest contiguous subarray whose total pric