Please help me figure out why this code does not work?

import java.util.Scanner;
class Chef {
  static int[] arr;
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    arr = new int[n];
    for (int i = 0; i < n; i++)
      arr[i] = sc.nextInt();
    int p = 0;
    System.out.println(minSum(p));
  }
  static int minSum(int p){
    if (p==arr.length-1)
      return Math.min(arr[p], arr[0]);
    else{
      return Math.min((arr[p]+minSum(p+1)), (arr[p+1]+minSum(p+1)));
    }
  }
 
}