#include <iostream>
#include <string>
#include <vector>

int main() {
    std::cout << std::boolalpha;
    std::cout << (std::string { "abc" } < std::string { "acd" }) << std::endl;
    std::cout << (std::string { "abc" } < std::string { "ab" }) << std::endl;
    std::cout << (std::vector<int> { 1, 2, 3 } < std::vector<int> { 1, 2, 4 }) << std::endl;
    std::cout << (std::vector<int> { 1, 2, 3 } < std::vector<int> { 1, 2 }) << std::endl;
}