#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
 
int main() {
	vector<string> a = {"1.0", "2.0", "3.0", "9.0", "10.0"};
	sort(a.begin(), a.end());
	for (auto &s : a)
	    cout << s << " ";
	cout << endl;
	sort(
        a.begin()
    ,   a.end()
    ,   [](const string &lhs, const string &rhs) -> bool { 
            return stod(lhs) < stod(rhs); 
        }
    );
	for (auto &s : a)
	    cout << s << " ";
	cout << endl;
	return 0;
}

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