Number of 1 Bits | Live Coding with Explanation | Leetcode - 191

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This video explains 2 Approaches and a recursive solution with follow up for number of 1 bits leetcode 191

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  1. Algorithms Made Easy
  2. leetcode
  3. programming
  4. coding
  5. leetcode Number of 1 Bits
  6. Number of 1 Bits
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AlgorithmsMadeEasy
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Thank you for such great explanation and clear approach!!

harshamadhwani
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im so happy to have found this yet im so confused.

malkomeks
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Instead of num & 1, I tried for(i=0; i<32; ++i) if(num%1==1) {count++; num>>>1;} in Java. It didn't work for a few cases. Does anyone know why?

darshanv
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please explain...i am not getting the code dry run

nikhilpoonia
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why can't we use the left shift instead of the right shift.

anushkasiddhu
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Can anyone explain the time complexity in detail of solution 2? From my understanding, I know it is because numbers are 32 bits integer, then worst case time complexity is O(32) which is O(1).

Ben-pbct
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why is this code not working ??

class Solution {
public:
int hammingWeight(uint32_t n) {

int cnt =0 ;
while (n!=0)
{
if(n%10==1)
cnt++;
n=n/10;
}
return cnt;

}
};

puspaulmukhopadhyay