merge-sorted-array.py

# -*- coding:utf-8 -*-


# Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.
#
# Note:
#
#
# 	The number of elements initialized in nums1 and nums2 are m and n respectively.
# 	You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2.
#
#
# Example:
#
#
# Input:
# nums1 = [1,2,3,0,0,0], m = 3
# nums2 = [2,5,6],       n = 3
#
# Output: [1,2,2,3,5,6]
#
#


class Solution(object):
    def merge(self, nums1, m, nums2, n):
        """
        :type nums1: List[int]
        :type m: int
        :type nums2: List[int]
        :type n: int
        :rtype: void Do not return anything, modify nums1 in-place instead.
        """
        while m and n:
            if nums1[m-1]>=nums2[n-1]:
                nums1[m+n-1] = nums1[m-1]
                m -= 1
            else:
                nums1[m+n-1]=nums2[n-1]
                n -= 1
        
        if n>0:
            for i in xrange(n):
                nums1[i] = nums2[i]