joc8

#include <fstream>
using namespace std;

bool alternant(int n)
{
    int nc=0,cif[9];
    while(n)
        cif[nc++]=n%10,n/=10;
    if(nc==1)
        return true;
    if(nc%2==0)
        return false;
    for(int i=1;i<nc-1;++i)
        if((cif[i-1]<=cif[i]&&cif[i+1]>=cif[i])||(cif[i-1]>=cif[i]&&cif[i+1]<=cif[i]))
            return false;
    return true;
}

int main()
{
    int n,x;
    ifstream f("joc8.in");
    f>>n;
    int sol=0;
    for(int i=1;i<=n;++i)
    {
        f>>x;
        if(alternant(x))
            ++sol;
    }
    f.close();
    ofstream g("joc8.out");
    g<<sol;
    g.close();
    return 0;
}