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Guys As i have found most difficulties to understand the problem.Here From the above picture we can see that the product of ith and jth number will be stroed in position i+j and i+j+1,
i.e., res[i+j] is used to store the carry value and res[i+j+1] is used to rightmost digit of the sum.
I hope it will help you.
Easiest Solution With Explanation
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