787 归并排序
作者:
被迫营业
,
2022-01-18 17:08:06
,
所有人可见
,
阅读 179
#include<iostream>
using namespace std;
int n;
const int N=1e6+10;
int q[N],temp[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 &&j<=r){
if(q[i]<=q[j]) temp[k++]=q[i++];
else temp[k++]=q[j++];
}
while(i<=mid) temp[k++]=q[i++];
while(j<=r) temp[k++]=q[j++];
for(int i=l,j=0;i<=r;i++,j++){
q[i]=temp[j];
}
}
int main(){
cin>>n;
for(int i=0;i<n;i++){
cin>>q[i];
}
merge_sort(q,0,n-1);
for(int i=0;i<n;i++){
cout<<q[i]<<" ";
}
return 0;
}