Sum of Values at Indices With K Set Bits - Practice Coding | SlaveCode
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2859. Sum of Values at Indices With K Set Bits
Easy
10 Points
Array
Bit Manipulation
You are given a 0-indexed integer array nums and an integer k.
Return an integer that denotes the sum of elements in nums whose corresponding indices have exactly k set bits in their binary representation.
The set bits in an integer are the 1's present when it is written in binary.
Examples
Example 1
Input: nums = [5,10,1,5,2], k = 1
Output: 13
Explanation: The binary representation of the indices are:
0 = 0002
1 = 0012
2 = 0102
3 = 0112
4 = 1002
Indices 1, 2, and 4 have k = 1 set bits in their binary representation.
Hence, the answer is nums[1] + nums[2] + nums[4] = 13.
Example 2
Input: nums = [4,3,2,1], k = 2
Output: 1
Explanation: The binary representation of the indices are:
0 = 002
1 = 012
2 = 102
3 = 112
Only index 3 has k = 2 set bits in its binary representation.
Hence, the answer is nums[3] = 1.
Constraints
1 <= nums.length <= 1000
1 <= nums[i] <= 105
0 <= k <= 10
2859. Sum of Values at Indices With K Set Bits
Easy
10 Points
Array
Bit Manipulation
You are given a 0-indexed integer array nums and an integer k.
Return an integer that denotes the sum of elements in nums whose corresponding indices have exactly k set bits in their binary representation.
The set bits in an integer are the 1's present when it is written in binary.
Examples
Example 1
Input: nums = [5,10,1,5,2], k = 1
Output: 13
Explanation: The binary representation of the indices are:
0 = 0002
1 = 0012
2 = 0102
3 = 0112
4 = 1002
Indices 1, 2, and 4 have k = 1 set bits in their binary representation.
Hence, the answer is nums[1] + nums[2] + nums[4] = 13.
Example 2
Input: nums = [4,3,2,1], k = 2
Output: 1
Explanation: The binary representation of the indices are:
0 = 002
1 = 012
2 = 102
3 = 112
Only index 3 has k = 2 set bits in its binary representation.
Hence, the answer is nums[3] = 1.