Leetcode Problem 1570. Dot Product of Two Sparse Vectors
Leetcode Solutions
Hash Map Approach for Sparse Vector Dot Product
- Initialize a hash map during the construction of the SparseVector.
- Iterate through the input array, and for each non-zero value, add an entry to the hash map with the index as the key and the value as the value.
- To compute the dot product, iterate through the entries of the hash map of one vector.
- For each entry, check if the corresponding index exists in the other vector's hash map.
- If it exists, multiply the two values and add the result to the dot product sum.
- Return the dot product sum.
Index-Value Pairs Approach for Sparse Vector Dot Product
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