ok deci :
#include <iostream>
using namespace std.
unsigned p,i,m,k;
int v[99];
int main ()
{
cout << "n=";
cin>>n;
cout <<"elementele sirului sunt :"
for(i=0;i<n;i++)
{cin >>v[i];
cout<<";";}
p=1
for(i=0;i<n;i++)
if(v[i]>100)
p=p*v[i];
cout<<p;
m=0;
for(i=0;i<n;i++)
if(v[i]<0)
m++;
cout<<m;
for(i=1;i<n;i++)
if (v[i]==(v[i-1]+v[i+1])/2)
cout <<v[i]<<";";
k=0;
for(i=0;i<n;i++)
if(v[i]<v[i-1])
k++
if(k==0)
cout<<"da";
else
cout<<"nu";
return 0;
}