Happy Year

Next Happy Year

Challenge Difficulty: Medium | Estimated completion time: ~15 minutes

Sloth needs your help to find out the next happy year.

A Happy Year is the year with only distinct digits (no duplicates).

Create a function that takes an integer year and returns the next happy year.

Examples

happyYear(2017)
output = 2018
# 2018 is the next happy year with all numbers being different.
 
happyYear(1990)
output = 2013
# 2013 is the next happy year with all numbers being different.
 
happyYear(2021)
output = 2031
# 2031 is the next happy year with all numbers being different.

Solution

Python

def happy_year(year: int) -> int: """Find the next happy year with all distinct digits. Args: year: Starting year Returns: Next year with all unique digits """ current_year = year + 1 while True: year_string = str(current_year) if len(year_string) == len(set(year_string)): return current_year current_year += 1 if __name__ == "__main__": print(happy_year(2017)) # 2018 print(happy_year(1990)) # 2013 print(happy_year(2021)) # 2031

Output