final 2a - capicua

#include <iostream>
#include <array>
#include <sstream>

using namespace std;

struct pila {
    array<int,10> arr;
    int index = 0;
};

void push (pila& p, int a)
{
    p.arr.at(p.index) = a;
    p.index++;
}

void pop (pila& p, int& a)
{
    a = p.arr.at(p.index - 1);
    p.index--;
}

int main()
{
    stringstream input;
    int n, a, b; pila p; bool c = true;
    input << "5  2 1 7 1 2";

    cout << "ingrese cantidad de elementos" << endl;
    input >> n;

    cout << "ingrese los elementos de a uno" << endl;
    for (int i=0; i<n/2; i++)
    {
        input >> a;
        push (p, a);
    }

    if (n%2==1)
        input >> a;

    for (int i=0; i<n/2; i++)
    {
        input >> a;
        pop (p, b);
        if (a != b)
            c = false;
    }

    if (c)
        cout << "es capicua" << endl;
    else
        cout << "no es capicua" << endl;

    return 0;
}