Practice Number of Integers With Popcount-Depth Equal to K I
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Number of Integers With Popcount-Depth Equal to K I
The popcount of a positive integer is the number of 1 bits in its binary representation. Starting from x, repeatedly replace the current value by its popcount. The popcount-depth is the fewest replacements needed to reach 1; therefore 1 has depth 0. Given n and k, count integers from 1 through n whose popcount-depth is exactly k.
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Understanding the Number of Integers With Popcount-Depth Equal to K I Problem
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Problem Statement
The popcount of a positive integer is the number of 1 bits in its binary representation. Starting from x, repeatedly replace the current value by its popcount. The popcount-depth is the fewest replacements needed to reach 1; therefore 1 has depth 0. Given n and k, count integers from 1 through n whose popcount-depth is exactly k.
Source: Number of Integers With Popcount-Depth Equal to K I on LeetCode. Use the original task for its coding environment and submissions.
Number of Integers With Popcount-Depth Equal to K I
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Examples
# Example 1
n = 4, k = 1
2
# Example 2
n = 7, k = 2
3
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