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How can I solve this problem, Can you please me suggest some algorithms to solve this problem?
I came to know that hashing solution of this problem can also be used to solve similar problem in tree also.
Kapil Bansal Answered question
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Start iterating over the array, for each element check whether the sum-element is available in array or not.
For eg,if the array is 1,3,5,8,10
We want to find the sum as 11
Now 11-1=10 is available in the array.Similarly 11-3=8 is also available in array
Kapil Bansal Answered question