Doubt in pair class

#1

Hello, this is a question from the algorithms stl quiz. I want to know the difference between all first three options. Could you please help me ?

We wish to design a data type that can be used to hold a string, an integer, a double and a pointer to an integer.

Which of the following can be used as an alternative to above required data type.

typedef pair< string, pair< int, pair< double, int * > > > myDataType

typedef pair< string, pair< int, pair< int, int * > > > myDataType;

typedef pair< string, pair< int*, double > > myDataType;

None of these.

#2

Hello @yashsharma4304 the correct option for this is 1st.
if you have any doubt in understandig please replt so that we can discuss.

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#3

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