//#include <memory>
//#include "boost/shared_ptr.hpp"
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
using namespace boost::lambda;
using namespace std;
int main()
{
vector<vector<string> > as;
max_element(as.begin(), as.end(), bind(&vector<string>::size, _1) < bind(&vector<string>::size, _2));
}