#include <iostream>
using namespace std;

void reverseArray(int arr[],int sz){
    int start=0 ,end=sz-1;
    
    while(start<end){
        swap(arr[start],arr[end]);
        start++;
        end--;
   }
}

int main() {
    int arr[]={4,2,7,8,1,2,5};
    int sz=7;

    reverseArray(arr,sz);

    for(int i=0;i<sz;i++){
        cout<<arr[i] << " ";
    }
    cout << endl;
    return 0;
}