Available question text
Count how many times the digit '1' appears in all integers from 0 to n; the challenge is to derive an O(log n) solution by analyzing each digit position's contribution using place-value decomposition.
Related questions
Continue with questions that share topics or the same question type.
- Check if Number Has Equal Digit Count and Digit Value
Coding
- Find Number of Islands with One Edit Allowed
Coding
- Form Smallest Number From Two Digit Arrays
Coding
- Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Walk through Kadane's algorithm and explain the O(n) approach.
Coding
Sources · 1 reference
These records explain where the question appears. A company tag or candidate report does not guarantee a future interview question.
Hello Interview · 1 record
No company association
Leetcode 233. Number of Digit One
Interview date not specified · 0 source reports
Source snapshot: Nov 12, 2026
View source