guolinaileen

public class Solution {
    public double pow(double x, int n) {
        // Start typing your Java solution below
        // DO NOT write main() function        
      if(n==0) return 1; 
      if(x==0) return 0;
      if(n==1) return x; 
      if(n<0) 
      {
	n=-n; x=1/x; 

guolinaileen

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) {
 *         val = x;
 *         next = null;
 *     }
 * }