Suppose an arithmetic expression can include three types of brackets: parentheses " (" and " )" , in square brackets " [" and " ]" and braces " {" and " }" and this can be any of three brackets order of nested (such as: ... [... {...} ... [...] ...] ... [...] ... (...) ...). The preparation of discrimination contained in the given expression appears in parentheses matching algorithm is correct (known expression for the character data elements have been deposited in the order form)

stack.c

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