First Unique Character

File Name: first_unique_character.py ```python from stylepy import h1,h2,h3,h4,h5,h6 from collections import Counter

def first_uniq_char_brute1(s: str) -> int: count_char = {i: s.count(s[i]) for i in range(len(s)) } for index, count in count_char.items(): if count == 1: return index return -1

def first_uniq_char_brute2(s: str) -> int: count_char = Counter(s) stack = {} for i in range(len(s)): if s[i] not in stack: stack[s[i]] = i char = next((char for char, count in count_char.items() if count == 1), -1 ) return stack[char] if char in stack else -1

def first_uniq_char_optimised(s: str) -> int: result = next((i for i in range(len(s)) if s.count(s[i])==1), -1 ) return result

def first_uniq_char_optimised2(s: str) -> int: for i in range(len(s)): if s.count(s[i]) == 1: return i return -1

h1("Brute-force 1") s = 'leetcode' index = first_uniq_char_brute1(s) h3(f"first non repeating character index {index} for {s} ")

s = 'loveleetcode' index = first_uniq_char_brute1(s) h3(f"first non repeating character index {index} for {s} ")

s = 'aabb' index = first_uniq_char_brute1(s) h3(f"first non repeating character index {index} for {s} ")

h1("Brute-force 2") s = 'leetcode' index = first_uniq_char_brute2(s) h3(f"first non repeating character index {index} for {s} ")

s = 'loveleetcode' index = first_uniq_char_brute2(s) h3(f"first non repeating character index {index} for {s} ")

s = 'aabb' index = first_uniq_char_brute2(s) h3(f"first non repeating character index {index} for {s} ")

h1("Optimised") s = 'leetcode' index = first_uniq_char_optimised(s) h3(f"first non repeating character index {index} for {s} ")

s = 'loveleetcode' index = first_uniq_char_optimised(s) h3(f"first non repeating character index {index} for {s} ")

s = 'aabb' index = first_uniq_char_optimised(s) h3(f"first non repeating character index {index} for {s} ")

h1("Optimised 2 ") s = 'leetcode' index = first_uniq_char_optimised2(s) h3(f"first non repeating character index {index} for {s} ")

s = 'loveleetcode' index = first_uniq_char_optimised2(s) h3(f"first non repeating character index {index} for {s} ")

s = 'aabb' index = first_uniq_char_optimised2(s) h3(f"first non repeating character index {index} for {s} ")```