#include <iostream>

using namespace std;

template <typename T>
T Abs(T num) {
    return num < 0 ? -num : num;
}



int main() {

    setlocale(LC_ALL, "ru");

    cout << Abs(-1) << endl;
    cout << Abs(5.35) << endl;
    cout << Abs(-4.2) << endl;
}