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Very large negative values are not necessary. See that an hourglass is made up of 7 digits. the sum of 'those' 7 digits can be minimum when each digit is itself minimum, i.e, -9. Hence, the minimum sum will be (7)x(-9), which equals -63. So, we can initialize minimum as -64.

## 2D Array - DS

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Very large negative values are not necessary. See that an hourglass is made up of 7 digits. the sum of 'those' 7 digits can be minimum when each digit is itself minimum, i.e, -9. Hence, the minimum sum will be (7)x(-9), which equals -63. So, we can initialize minimum as -64.