Solution:

arr[n],sum = 0;

for ( int i = 0 ; i < n; i++ ) {
       sum ^= arr[i];
}

print sum; // required number

-- 


Akshat Sapra
Under Graduation(B.Tech)
IIIT-Allahabad(Amethi Campus)
--------------------------------------
[email protected]
[email protected]
[email protected]
[email protected]

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