using namespace std;
int pal(unsigned x)
{
unsigned nr=x, ras=0;
while(nr!=0)
{
ras=ras*10+nr%10;
nr=nr/10;
}
if(ras==x)
return 1;
else
return 0;
}
int main()
{
unsigned n, i, c=0, v[100];
cin>>n;
for(i=1; i<=n; i++)
cin>>v[i];
for(i=1; i<=n; i++)
if(pal(v[i])==1)
c++;
cout<<c;
return 0;
}