PROIECT INFO 12/12/2019

#include <iostream>
#include <cmath>
using namespace std;

int v[1000000], n;
int nrprime, nrperf, nrpal;

void citire()
{
    cout << "n=";
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cout << "v[" << i << "]=";
        cin >> v[i];
    }
}

int ePrim(int x)
{
    if ((x % 2 == 0 && x != 2 && x != -2) || x == 1)
        return 0;

    for (int d = 3; d * d <= x; d += 2)
        if (x % d == 0)
            return 0;
    return 1;
}

int ePerf(int x)
{
    int s = 1;
    for (int d = 2; d * d <= x; d++)
    {
        if (x % d == 0)
        {
            s += d;
            if (d != (x / d))
                s += x / d;
        }
    }

    if (x == s)
        return 1;
    return 0;
}

int ogl(int x)
{
    int inv = 0;
    do
    {
        inv = inv * 10 + x % 10;
        x /= 10;
    }
    while (x);

    return inv;
}

int ePal(int x)
{
    int inv = ogl(x);
    if (x == inv)
        return 1;
    return 0;
}

int sumcif(int x)
{
    int s = 0;
    do
    {
        s += (x % 10);
        x /= 10;
    }
    while (x);

    s = abs(s);
    return s;
}

int main()
{
    citire();

    for (int i = 0; i < n; i++)
        if (ePrim(v[i]))
            nrprime++;
    cout << "numar numere prime: " << nrprime << endl;

    for (int i = 0; i < n; i++)
        if (ePerf(v[i]))
            nrperf++;
    cout << "numar numere perfecte: " << nrperf << endl;

    cout << "oglindite: " << endl;
    for (int i = 0; i < n; i++)
        cout << "oglinditul lui " << v[i] << " este: " << ogl(v[i]) << endl;

    for (int i = 0; i < n; i++)
        if (ePal(v[i]))
            nrpal++;
    cout << "numar palindroame: " << nrpal << endl;

    cout << "suma cifrelor numerelor: " << endl;
    for (int i = 0; i < n; i++)
        cout << "suma cifrelor lui " << v[i] << " este: " << sumcif(v[i]) << endl;

    return 0;
}