Task 4.1

#include <iostream>

using namespace std;

int main()
{
    int sizeFirst;
    cin >> sizeFirst;
    int *elementsFirst = new int[sizeFirst];

    for (int i = 0; i < sizeFirst; i++)
        cin >> elementsFirst[i];

    int sizeSecond;
    cin >> sizeSecond;
    int* elementsSecond = new int[sizeSecond];

    for (int i = 0; i < sizeSecond; i++)
        cin >> elementsSecond[i];

    for (int i = 0; i < sizeFirst; i++)
        for (int j = 0; j < sizeSecond; j++)
            if (elementsFirst[i] == elementsSecond[j])
                break;
            else if (j == sizeSecond - 1) cout << elementsFirst[i];
}