#include <algorithm>
#include <iostream>
#include <vector>
int main() {
int a,b,c,d;
std::cout<<"enter 1st number:";
std::cin>>a;
std::cout<<"enter 2nd number:";
std::cin>>b;
std::cout<<"enter 3rd number:";
std::cin>>c;
std::cout<<"enter 4th number:";
std::cin>>d;
std::vector<int> numbers = {a,b,c,d};
auto largest = std::max_element(begin(numbers), end(numbers));
std::cout << "max element is: " << *largest << '\n';
auto smallest = std::min_element(begin(numbers), end(numbers));
std::cout << "min element is: " << *smallest << '\n';
return 0;
}
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