How should I practice Sort Products by Aisle With Frozen Items Last?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Instacart onsite interview problems in FastPrep.

Is Sort Products by Aisle With Frozen Items Last associated with Instacart?

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Problem · Array

Sort Products by Aisle With Frozen Items Last

Learn this problem

● Easy

InstacartFULLTIMEONSITE INTERVIEW

Problem statement

All non-frozen products before all frozen products.
Within each group, aisle number descending.
Within the same group and aisle, SKU lexicographically ascending.

The other product fields do not affect ordering.

Function

sortProductSkus(products: String[]) → String[]

Examples

Example 1

products = ["A7|Apple|1|100|7|false","A2|Bread|1|200|2|false","F100|Ice|1|300|100|true","F3|Peas|1|400|3|true"]return = ["A7","A2","F100","F3"]

Both non-frozen records come first with aisle 7 before aisle 2. Frozen aisle 100 still follows every non-frozen item.

Example 2

products = ["B|B|1|1|5|false","A|A|1|1|5|false","D|D|1|1|8|true","C|C|1|1|8|true"]return = ["A","B","C","D"]

Each pair shares its group and aisle, so SKU order breaks both ties.

Example 3

products = ["Z|Z|1|1|-2|true","X|X|1|1|0|false","Y|Y|1|1|-5|false"]return = ["X","Y","Z"]

Descending aisle order places non-frozen aisle 0 before -5; the frozen record remains last.

Constraints

1 <= products.length <= 10^5.
Every record is syntactically valid and contains a unique non-empty SKU.
String fields do not contain |.
aisle is a signed 32-bit integer, and isFrozen is true or false.