#include<iostream.h>
void modify(int arr[],int n)
{
    if(n<=1)
    return;
    int prev=arr[0];
    arr[0]=arr[0]*arr[1];
    for(int i=1;i<n-1;i++)
    {
        int curr=arr[i];
        arr[i]=prev*arr[i+1];
        prev=curr;
    }
    arr[n-1]=prev*arr[n-1];
    int main()
    {
        int arr[]={1,3,4,5,6);
        int n=sizeof(arr)/sizeof(arr[0]);
        modify(arr,n);
        for(int i=0;i<n;i++)
        cout<<arr[i]<<" ";
        return 0;
    }
}

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