Wont able to understand this TLE output

#1

#include
using namespace std;

int main() {
int T;
cin >> T;
if(T > 20 || T < 1)
return 0;
while(T–)
{
int N;
cin >> N;
int arr[N];
long int sum = 0, cmax = 0;
for(int i=0; i<N; i++)
cin >> arr[i];

    for(int i=0; i<N-1; i++)
    {
        sum = arr[i];
        for(int j=i+1; j<N; j++)
        {   
            sum = sum + arr[j];
            if(sum > cmax)
                cmax = sum;  
        }
    }
    cout << cmax << endl;
}
return 0;

}

#2

Please share your code using ide.codingblocks.com
Else I won’t be able to debug it.

#3

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