Please tell me How can I solve this issue in String and Please provide some resources for bigint library. I am facing very difficulties in that.
Please tell about this error
@aryangrover You cannot use strings like this, only addition (concatenation) is allowed all other operations are invalid.
Second, there is no Big Integer Class in C++.
To solve this problem you will need to create a function using string to multiple large numbers.
@aryangrover Or you can use Python there this kind of multiplication will work. Or you can use Java and Lib BigInteger.
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