Python Exercises: Next number containing only distinct digits

Last update on April 24 2025 12:34:44 (UTC/GMT +8 hours)

91. Next Distinct-Digit Number Finder

Write a Python program that accepts an integer number with distinct digits and displays the next number containing only distinct digits.

Sample Data:
12345) -> 12346
(99999) -> 102345
(100) -> 102

Sample Solution-1:

Python Code:

def test(n):
	n += 1
	if len(set(str(n))) == len(str(n)):
		return n
	return test(n)
n = 12345
print("Original number:", n)
print("Next number containing only distinct digits!") 
print(test(n))
n = 99999
print("Original number:", n)
print("Next number containing only distinct digits!") 
print(test(n))
n = 1
print("Original number:", n)
print("Next number containing only distinct digits!") 
print(test(n))
n = 100
print("Original number:", n)
print("Next number containing only distinct digits!") 
print(test(n))

Sample Output:

Original number: 12345
Next number containing only distinct digits!
12346
Original number: 99999
Next number containing only distinct digits!

Flowchart:

Sample Solution-2:

Python Code:

def test(n):    
    while True:
        n += 1
        x = sorted(str(n))
        temp = sorted(set(str(n)))
        if x == temp:
            return n
        
n = 12345
print("Original number:", n)
print("Next number containing only distinct digits!")
print(test(n))
n = 99999
print("Original number:", n)
print("Next number containing only distinct digits!")
print(test(n))
n = 1
print("Original number:", n)
print("Next number containing only distinct digits!")
print(test(n))
n = 100
print("Original number:", n)
print("Next number containing only distinct digits!")
print(test(n))

Sample Output:

Original number: 12345
Next number containing only distinct digits!
12346
Original number: 99999
Next number containing only distinct digits!
102345
Original number: 1
Next number containing only distinct digits!
2
Original number: 100
Next number containing only distinct digits!
102

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to accept an integer with distinct digits and compute the next number that contains only distinct digits, then print the result.
• Write a Python function that, given a number, iteratively increments it until a number with all distinct digits is found, and returns that number.
• Write a Python script to test the function with several numbers and print the next distinct-digit number for each input.
• Write a Python program to prompt the user for an integer with distinct digits and output the next number with distinct digits, with error handling.

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Python Code Editor:

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