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Expression Validation with Nested Operators

You are given a string representation of a mathematical expression containing integers, operators ('+', '-', '*', '/'), and parentheses. Your task is to validate whether the expression is correct in terms of syntax (correct nesting of operators and parentheses). Input: A single line string containing the expression to validate. The length will be between 1 and 10000 characters. Output: 'Valid' if the expression is valid, otherwise 'Invalid'. Example: Input: (3 + (4 - 5)) * 2 Output: Valid

Key concepts

stackexpressionvalidation

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