Please explain the code output

#1

What will be the output of following C++ code?
#include <bits/stdc++.h>
using namespace std;
int main()
{
sets;
pair<set::iterator, bool> ret;
s.insert(1);
s.insert(5);
s.insert(10);
s.insert(3);
ret = s.insert(10);
cout<<ret.second<<endl;
return 0;
}

#2

Can you please explain

#3

@saikatchoudhury1998 Can you send me your code in the online ide. It is because the current code has some compilation errors

#4

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