Having when submitted to CB gives trouble

#1

https://online.codingblocks.com/app/player/72999/content/53215/5290/code-challenge

#include
using namespace std;
#include

int main()
{
int a[100000000];
int ms=0,cs=0;
int n,m;
cin>>m;

for (int l=0;l<m;l++)
{

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

    for(int i=0;i<n;i++)
    {
        cs=cs+a[i];
        if(cs<0)
        {
            cs=0;
        }
        ms=max(cs,ms);
    }


    cout<<ms<<endl;
}

}