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java/12_sorts/MergeSort

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PansonPanson 2018-10-23 23:31:39 +08:00
parent 91826a79fb
commit 373b935efb
1 changed files with 2 additions and 2 deletions
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4
java/12_sorts/MergeSort.java
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@ -15,8 +15,8 @@ public class MergeSort {
// 递归终止条件 // 递归终止条件
if (p >= r) return; if (p >= r) return;
// 取p到r之间的中间位置q // 取p到r之间的中间位置q,防止（p+r）的和超过int类型最大值
int q = (p+r)/2; int q = p + (r - p)/2;
// 分治递归 // 分治递归
mergeSortInternally(a, p, q); mergeSortInternally(a, p, q);
mergeSortInternally(a, q+1, r); mergeSortInternally(a, q+1, r);