How should I practice Check Array Arithmetic Expressions?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Capital One online assessment problems in FastPrep.

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Check Array Arithmetic Expressions

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Problem statement

You are given three equal-length integer arrays a, b, and c, together with an equal-length character array signs.

Each element of signs is either '+' or '-'. Return a boolean array result of the same length, where result[i] is true exactly when applying signs[i] to a[i] and b[i] produces c[i].

If signs[i] == '+', check whether a[i] + b[i] == c[i].
If signs[i] == '-', check whether a[i] - b[i] == c[i].

Function

checkArithmeticExpressions(a: int[], signs: char[], b: int[], c: int[]) → boolean[]

Examples

Example 1

a = [3,2,-1,4]signs = ["+","-","-","+"]b = [2,7,-5,2]c = [5,5,4,2]return = [true,false,true,false]

The four checks are 3 + 2 = 5, 2 - 7 != 5, -1 - (-5) = 4, and 4 + 2 != 2.

Constraints

1 <= a.length == b.length == c.length == signs.length <= 10^5
-10^9 <= a[i], b[i], c[i] <= 10^9
Every value in signs is either '+' or '-'.
Every evaluated addition or subtraction fits a signed 32-bit integer.

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