String Expression Simplification | Dataford Interview Questions

Simplify a string expression containing multiple brackets and operands such as + and -, removing all brackets and producing the simplified result.

Implement simplify_expression(expression). The expression contains single-letter operands, +, -, parentheses, and optional spaces. Return an equivalent expression with no parentheses or spaces, preserving operand order and using explicit signs between terms.

The input is valid, contains at least one operand, and does not use unary operators. For example, a-(b-c-(d+e)) becomes a-b+c+d+e.

Constraints

1 <= len(expression) <= 10^4
Operands are single lowercase English letters.
The expression contains only lowercase letters, +, -, parentheses, and spaces.
Parentheses are balanced and operators are binary.
The expression contains at least one operand.

Function Signature

def simplify_expression(expression):

Your question is String Expression Simplification. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Simplify a string expression containing multiple brackets and operands such as + and -, removing all brackets and producing the simplified result.

The input is valid, contains at least one operand, and does not use unary operators. For example, a-(b-c-(d+e)) becomes a-b+c+d+e.

Constraints

1 <= len(expression) <= 10^4
Operands are single lowercase English letters.
The expression contains only lowercase letters, +, -, parentheses, and spaces.
Parentheses are balanced and operators are binary.
The expression contains at least one operand.

Function Signature

def simplify_expression(expression):

Your question is String Expression Simplification. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.