#include <iostream>  
#include <cstdlib>
#include <cmath>
using namespace std;
int main(int argc, char *argv[])
{  int N=0, Npos=0, Npairs=0,
       x, y, max=0; //or max_num=INT_MIN; or max_num=-999;
   do {
   cout<<"Give N>=2 ?"; 
   cin>>N;
   } while (N<2);
   cout<<"Enter next number: ";
   cin>>x;
   if (x>0) {Npos++; max=x;}
   for (int i=2; i<=N; i++) {
      cout<<"Enter next number: ";
      cin>>y;
      if (y>0) {
        Npos++;
        if (y>max) max = y;
      }
      if (abs(x)-abs(y)==1) {
       Npairs++;
       cout<<"Found pair ("<<x<<","<<y<<")"<<endl;
      }
      x=y;
   }
   if (Npos>0)
     cout<<"Count pos is "<<Npos<<" Largest is "<<max<<endl;
     else cout<<"NO pos numbers given"<<endl;
   if (Npairs==0) cout<<"NO pairs found"<<endl;
   system("PAUSE");
   return 0;
}