Run time error is there

#1

my code is showing run time error what is it?
#include
using namespace std;
int main() {
int cases;
cin>>cases;
for(int d=1;d<=cases;d++)
{
int n;
cin>>n;
int a[1000];

	for(int i=0;i<n;i++)
    cin>>a[i];

	int maxsofar=a[0];
	int maxending=0;

	for(int i=0;i<n;i++)
	{   maxending=maxending+a[i];
	    maxsofar=max(maxending,maxsofar);
		maxending=max(maxending,0);

	}
	cout<<maxsofar<<endl;
	



}
return 0;

}

#2

hello @himanshu24

use given n to declare array size.

#3

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