How to Solve Count Good Meals Problem
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Count Good Meals
A good meal is a meal that contains exactly two different food items with a sum of deliciousness equal to a power of two. You can pick any two different foods to make a good meal. Given an array of in...
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Understanding the Count Good Meals Problem
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Problem Statement
A good meal is a meal that contains exactly two different food items with a sum of deliciousness equal to a power of two. You can pick any two different foods to make a good meal. Given an array of integers deliciousness where deliciousness[i] is the deliciousness of the ith item of food, return the number of different good meals you can make from this list modulo 109 + 7. Note that items with different indices are considered different even if they have the same deliciousness value.
Count Good Meals
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Examples
deliciousness = [1,3,5,7,9]4The good meals are (1,3), (1,7), (3,5) and, (7,9). Their respective sums are 4, 8, 8, and 16, all of which are powers of 2.
deliciousness = [1,1,1,3,3,3,7]15The good meals are (1,1) with 3 ways, (1,3) with 9 ways, and (1,7) with 3 ways.
Constraints
1 <= deliciousness.length <= 1050 <= deliciousness[i] <= 220How Interview Coder Helps with Leetcode Problems
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