Not able to solve using strings

#1

sir/mam…I have tried solving this question using array of strings . The sample input is working fine but test cases are not working.

#2

Consider a case:
1
2
98 9

Expected O/p:
998

The custom compare function must be something like this:
bool mycompare(string a,string b)
{
string ab=a+b;
string ba=b+a;
return ab>ba;
}

#3

why can’t it be return a>b?

#4

Dry run with the above case as i have mentioned to understand.

#5

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