最大差值

import java.util.Arrays;

public class LongestDistance {

    public int getDis(int[] A, int n) {
      int max = 0;
        int min = A[0];
        for ( int i = 0 ; i < n ; i++){
            if ( A[i] < min){
                min = A[i];
            }
            if ( A[i] - min > max){
                max = A[i] - min;
            }
        }
        return max;
    }
}