Dynamic Sensor Buffer

#include <iostream>

int main() {
    int n ,sum=0,avg=0;
    std::cin >> n;

    if (n < 1) {
        return 0;
    }

    // Write your dynamic buffer allocation code here
    int *arr=new int(n);
    for(int i=0;i<n;i++){
       std::cin>>arr[i];
    }
    for(int i=0;i<n;i++){
        sum+=arr[i];
    }
    avg=sum/n;
    std::cout<<avg<<std::endl;
    return 0;
}