• 2-Sum problem is a java based graphic user interface application
• It is an animated depiction of various solutions for a mathematical statement: Given an unsorted array ‘A’ of integers and a target sum ‘T’, we need to determine whether or not there are two numbers ‘X’ and ’Y’ in A such that X+Y=T.
• Soln1: To compare the sum of every possible pair in the given array with the target sum.Time complexity: O(n2).
• Soln2: For each x in the given array find t-x in the array via binary search.Time complexity :O(nlogn).
• Soln3: For each x in the given array lookup t-x in the array via HashTable.Time complexity :O(n).
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