归并排序
作者:
愛_
,
2024-11-19 17:06:31
,
所有人可见
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阅读 1
//归并排序
#include<bits/stdc++.h>
using namespace std;
const int N =10000010;
int n;
int q[N],tmp[N];
void merge_sort(int q[],int l,int r)
{
if(l>=r)return;
int mid = l+r>>1;
merge_sort(q,l,mid),merge_sort(q,mid+1,r);
int k=0,i=l,j=mid+1;
while(i<=mid and j<= r)
if(q[i]<=q[j])tmp[k++]=q[i++];
else tmp[k++] = q[j++];
while(i<=mid)tmp[k++] = q[i++];
while(j<=r)tmp[k++] = q[j++];
for(i=l,j=0;i<=r;i++,j++)q[i] = tmp[j];
}
int main()
{
scanf("%d",&n);
for(int i =0;i<n;i++)scanf("%d",&q[i]);
merge_sort(q,0,n-1);
for(int i =0;i<n;i++)printf("%d ",q[i]);
return 0;
}