#include <stack>
#include <iostream>
class my_stack : public std::stack< int > {
public:
using std::stack<int>::c; // expose the container
};
int main() {
my_stack blah;
blah.push( 1 );
blah.push( 2 );
int sum = 0;
for(int i=0;i<blah.size();i++){
sum+=blah.c[i];
}
std::cout<<sum<<std::endl;
}
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