Create two_sum.cppunordered_map<int,int>pairs; … #6
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…=0;i<n;i++) { if(pairs.find(sum-arr[i]) !=pairs.end()); { two_sum.cpp } pairs[arr[i]]++; } return count ; }
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… int count=0; for(int i=0;i<n;i++) { if(pairs.find(sum-arr[i]) !=pairs.end()); { two_sum.cpp } pairs[arr[i]]++; } return count ; }