dima1

#include <list>
#include <iostream>
#include <time.h>
#include <stdlib.h>

using namespace std;

double random_() {
    return 1.0 * (rand() % 100) / (rand() % 100);
}

int main(void) {
    srand(time(NULL));
    int n;
    list<double> l;
    cin >> n;

    cout << "\nList:\n";
    for (int i = 0; i < n; ++ i) {
        l.push_back(random_());
        cout << l.back() << " ";
    }
    cout << "\n\n";

//Задание а
    bool flag = false;
    for (list<double>::iterator i = l.begin(); i != l.end(); ++ i) {
        list<double>::iterator j = i;
        j ++;
        for (; j != l.end(); ++ j)
            if (*i == *j)
                flag = true;
    }
    cout << "Zadanie a: " << ((flag) ? "YES" : "NO") << "\n\n";

//Задание б
    l.push_front(l.back());
    l.pop_back();
    cout << "Zadanie b:\n";
    for (list<double>::iterator i = l.begin(); i != l.end(); ++ i)
        cout << *i << " ";
    cout << "\n";
    return 0;
}