LeetCode 1570. Dot Product of Two Sparse Vectors - Dylan_Java_NYC...
= 0){8hm.put(i, nums[i]);9}10}11}1213//Return the dotProduct of two sparse vectors14publicintdotProduct(SparseVector vec) {15if(this.hm.size() <vec.hm.size()){16returnvec.dotProduct(this);17}1819intres