Merge Two Sorted Arrays

描述

Given two sorted integer arrays A and B, merge B into A as one sorted array.

Note:You may assume that A has enough space to hold additional elements from B. The number of elements initialized in A and B are m and n respectively.

分析

无

代码

  1. // Merge Sorted Array
  2. // 时间复杂度O(m+n)，空间复杂度O(1)
  3. class Solution {
  4. public:
  5.     void merge(vector<int>& A, int m, vector<int>& B, int n) {
  6.         int ia = m - 1, ib = n - 1, icur = m + n - 1;
  7.         while(ia >= 0 && ib >= 0) {
  8.             A[icur--] = A[ia] >= B[ib] ? A[ia--] : B[ib--];
  9.         }
  10.         while(ib >= 0) {
  11.             A[icur--] = B[ib--];
  12.         }
  13.     }
  14. };

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原文: https://soulmachine.gitbooks.io/algorithm-essentials/content/cpp/sorting/merge-sort/merge-two-sorted-arrays.html