a****u
发帖数: 50 | | z**k
发帖数: 378 | 2 如果merge两个数组，用两个buffer顺序读取数组，用一个buffer将merge的结果输出。 | G****A
发帖数: 4160 | 3 Yes, but uses some extra space since it is not in-place.
*********************
MERGE(A, p, q, r)
1 n1 ← q - p + 1
2 n2 ← r - q
3 create arrays L[1 ‥ n1 + 1] and R[1 ‥ n2 + 1]
4 for i ← 1 to n1
5 do L[i] ← A[p + i - 1]
6 for j ← 1 to n2
7 do R[j] ← A[q + j]
8 L[n1 + 1] ← ∞
9 R[n2 + 1] ← ∞
10 i ← 1
11 j ← 1
12 for k ← p to r
13 do if L[i] ≤ R[j]
14 then A[k] ← L[i]
15 i ← i + 1
16 else A[k] ← R[j]
17 j ← j + 1
**
【在 a****u 的大作中提到】
: as title. any ideas?
|
|
