EvenOddXXL

#include <fstream>
#include <cstring>
#define NMax 1000
using namespace std;
typedef int Huge[NMax+3];
Huge A,X; /// A[0] si X[0] indica numarul de cifre

 unsigned long Mod(Huge A, unsigned long X)
/* Intoarce A%X */
{ int i;
  unsigned long R=0;

  for (i=A[0];i;i--)
    R=(10*R+A[i])%X;
  return R;
}

int main(void)
{
    char n[NMax];
    ifstream f("evenoddxxl.in");
    f>>n;
    A[0]=strlen(n);
    for(int i=A[0];i>0;--i)
        A[i]=n[A[0]-i]-'0';
    ofstream g("evenoddxxl.out");
    if(Mod(A,2)==0)
        g<<"Par";
    else
        g<<"Impar";
    return 0;
}