HackerEarth Lexical Analyzer problem solution

YASH PAL, 31 July 202417 February 2026

In this HackerEarth Lexical Analyzer problem solution Alex has recently decided to learn about how to design compilers. As a first step he needs to find the number of different variables that are present in the given code.

So Alex will be provided N statements each of which will be terminated by a semicolon(;). Now Alex needs to find the number of different variable names that are being present in the given statement. Any string which is present before the assignment operator denotes to a variable name.

HackerEarth Lexical Analyzer problem solution

HackerEarth Lexical Analyzer problem solution.

k=int(input().strip())

l=[]

p=set()

for _ inrange(k):

    s=input().strip()

    for i in s.split("="):

        l.append(i)

    p.add(l[0])

    l=[]

print(len(p))

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