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Problem: Find The K-th Lucky Number
Medium
30 min
Explore techniques to identify the k-th lucky number made up only of digits 4 and 7 using bitwise manipulation. Learn to analyze problem constraints and implement an efficient Python solution to handle large inputs.
Statement
A number is called lucky if it comprises only the digits k.
Constraints:
k
Examples
Understand the problem
Figure it out!
Try it yourself
Similar Problems
Reverse Bits
Find the Longest Substring Having Vowels in Even Counts
Longest Subarray With Maximum Bitwise AND
Count Triplets That Can Form Two Arrays of Equal XOR
Sum of All Subset XOR Totals
Minimum Number of K Consecutive Bit Flips
Minimum One Bit Operations to Make Integers Zero
Triples with Bitwise AND Equal To Zero
Power of Two
Hamming Distance
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Problem
Ask
Submissions
Problem: Find The K-th Lucky Number
Medium
30 min
Explore techniques to identify the k-th lucky number made up only of digits 4 and 7 using bitwise manipulation. Learn to analyze problem constraints and implement an efficient Python solution to handle large inputs.
Statement
A number is called lucky if it comprises only the digits k.
Constraints:
k
Examples
Understand the problem
Figure it out!
Try it yourself
Similar Problems
Reverse Bits
Find the Longest Substring Having Vowels in Even Counts
Longest Subarray With Maximum Bitwise AND
Count Triplets That Can Form Two Arrays of Equal XOR
Sum of All Subset XOR Totals
Minimum Number of K Consecutive Bit Flips
Minimum One Bit Operations to Make Integers Zero
Triples with Bitwise AND Equal To Zero
Power of Two
Hamming Distance