Only 5 test cases are correct for this code. Can you help me please.
#include<iostream>
using namespace std;
int main()
{
    int n,h,k,f=0;
    cin>>n>>h;
    int ar[n];
    for(int i=0;i<n;i++)
        cin>>ar[i];
        int x=0;
    for(;;)
    {
        cin>>k;
        switch(k)
        {
            case 1: if(x>=0)
                       --x;
                    break;
            case 2: if(x<(n-1))
                       ++x;
                    break;
            case 3: if(ar[x]>0&&f==0)
                       {
                           ar[x]--;
                           f=1;
                       }
                    break;
            case 4: if(ar[x]<h&&f==1)
                       {
                           ar[x]++;
                           f=0;
                       }
                    break;
            case 0: x=-1;
                    break;
        };
        if(x==-1)
            break;
    }
    for(int j=0;j<n;j++)
        cout<<ar[j]<<" ";
        return 0;
}