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#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

int *CreateDynamic(int amount);
void Fill(int *array, int amount);
void Out(int *array, int amount);
int *DeleteElements(int *array, int *amount);
void Delete(int *array);

int main()
{
    srand(time(0));
    setlocale(LC_ALL, "russian");
    int size; cin >> size;
    int *array = CreateDynamic(size);
    Fill(array, size);
    Out(array, size);
    array = DeleteElements(array, &size);
    Out(array, size);
    Delete(array);
}

int *CreateDynamic(int amount){
     int *temp = new int[amount];
    if(temp){
        return temp;
    }
}

void Fill(int *array, int amount){
    for(int i = 0; i < amount; i++){
        *(array+i) = rand() % 100;
    }
}

void Out(int *array, int amount){
    for(int i = 0; i < amount; i++){
        cout << *(array+i) << " ";
    }
    cout << endl;
}

int *DeleteElements(int *array, int *amount){
    int count = 0;
    for(int i = 0; i < *amount; i++){
        if(i % 2 == 1 ){
            count++;
        }
    }

    int *temp = new int[count];
    count = 0;

    for(int i = 0; i < *amount; i++){
        if(i % 2 == 1 ){
            temp[count++] = array[i];

        }
    }
    Delete(array);
    *amount = count;
    return temp;
}

void Delete(int *array){
    if(array){
        delete[] array;
        array = nullptr;
    }
    else{
        cout << "Данный массив пуст!" << endl;
        exit(1);
    }
}