Dynamic Sensor Buffer

#include <iostream>
using namespace std;

int main() {
    int n;
    int avg, sum;
    cin >> n;

    if (n < 1) {
        return 0;
    }

    int *buffer = new int(n);

    for (int i = 0; i<n ; i++)
    {
        cin >> buffer[i];
    }
    
    for (int i = 0; i<n; i++)
    {
        sum += buffer[i];
        avg = sum/n;
    }
    cout << avg;

    delete[] buffer;

    return 0;
}

Solving Approach