#include
using namespace std;
#define ll long long
void merge(ll int a[],ll int s,ll int e){
ll int mid=(s+e)/2;
ll int i=s;
ll int j=mid+1;
ll int k=s;
ll int temp[1000];
while(i<=mid&&j<=e){
if(a[i]<a[j]){
temp[k++]=a[i++];
}
else{
temp[k++]=a[j++];
}
}
while(i<=mid){
temp[k++]=a[i++];
}
while(j<=e){
temp[k++]=a[j++];
}
for(int i=s;i<=e;i++){
a[i]=temp[i];
}
}
void mergesort(ll int a[],ll int s,ll int e){
if(s>=e){
return ;
}
ll int mid=(s+e)/2;
mergesort(a,s,mid);
mergesort(a,mid+1,e);
merge(a,s,e);
}
int main(){
ll int n;
cin>>n;
ll int *a=new ll int[n];
for( int i=0;i<n;i++){
cin>>a[i];
}
mergesort(a,0,n-1);
for(int i=0;i<n;i++){
cout<<a[i]<<" ";
}
}
why it is showing run error?