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* Odd Times
You are given an array of positive integers in a single line, separated by a space (' '). All numbers occur even number of times except one number which occurs odd number of times. Find it, using only bitwise operations.
Examples
Input    Output
1 2 3 2 3 1 3    3
5 7 2 7 5 2 5    5
Hints
Read an array of integers.
Initialize a variable result with value 0.
Iterate through all number in the array.
Use XOR (^) of result and all numbers in the array.
XOR of two elements is 0 if both elements are same and XOR of a number x with 0 is x 
Print the result.
Think why the above algorithms is correct.