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
// Merge Sorted Array
// 时间复杂度O(m+n)，空间复杂度O(1)
class Solution {
public:
void merge(vector<int>& A, int m, vector<int>& B, int n) {
int ia = m - 1, ib = n - 1, icur = m + n - 1;
while(ia >= 0 && ib >= 0) {
A[icur--] = A[ia] >= B[ib] ? A[ia--] : B[ib--];
}
while(ib >= 0) {
A[icur--] = B[ib--];
}
}
};