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How to Solve Number of Integers With Popcount-Depth Equal to K I Problem
Master the Number of Integers With Popcount-Depth Equal to K I LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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LeetCode ProblemNumber of Integers With Popcount-Depth Equal to K I
You are given two integers n and k. For any positive integer x, define the following sequence: This sequence will eventually reach the value 1. The popcount-depth of x is defined as the smallest integer d >= 0 such that pd = 1. For example, if x = 7 (binary representation "111"). Then, the sequence is: 7 → 3 → 2 → 1, so the popcount-depth of 7 is 3. Your task is to determine the number of integers in the range [1, n] whose popcount-depth is exactly equal to k. Return the number of such integers.
MathDynamic ProgrammingCombinatorics
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Problem Breakdown
Understanding the Number of Integers With Popcount-Depth Equal to K I Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given two integers n and k. For any positive integer x, define the following sequence: This sequence will eventually reach the value 1. The popcount-depth of x is defined as the smallest integer d >= 0 such that pd = 1. For example, if x = 7 (binary representation "111"). Then, the sequence is: 7 → 3 → 2 → 1, so the popcount-depth of 7 is 3. Your task is to determine the number of integers in the range [1, n] whose popcount-depth is exactly equal to k. Return the number of such integers.
HardProblem #3621
LeetCodeNumber of Integers With Popcount-Depth Equal to K I
Related Topics
MathDynamic ProgrammingCombinatorics
How Phantom Code Helps
Get real-time assistance for Number of Integers With Popcount-Depth Equal to K I problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
n = 4, k = 1
Output
2
# Example 2
Input
n = 7, k = 2
Output
3
Constraints
1 <= n <= 1015
0 <= k <= 5
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Solve Number of Integers With Popcount-Depth Equal to K I — You are given two integers n and k. For any positive integer x, define the follo...
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def solve(input):
# Optimal O(n) solution
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Frequently Asked Questions
Common questions about solving Number of Integers With Popcount-Depth Equal to K I and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Number of Integers With Popcount-Depth Equal to K I during interviews?
Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
What if the interviewer asks follow-up questions or modifications to problems like Number of Integers With Popcount-Depth Equal to K I?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Number of Integers With Popcount-Depth Equal to K I?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Number of Integers With Popcount-Depth Equal to K I type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Number of Integers With Popcount-Depth Equal to K I interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Number of Integers With Popcount-Depth Equal to K I during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Number of Integers With Popcount-Depth Equal to K I style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Number of Integers With Popcount-Depth Equal to K I interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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