int arg, var, i, j;

cin >> arg;

int arr[arg][arg];

for (i = 0; i < arg; i++)
{
    for(j = 0; j < arg; j++)
    {
        cin >> var;
        arr[i][j] = var;
    }
}


for(int pivot = 0; pivot < arg; pivot++)
{
    for(i = 0; i < arg; i++)
    {
        for(j = 0; j < arg; j++)
        {
            if((arr[i][j] > (arr[i][pivot] + arr[pivot][j])) && ((arr[i][pivot] != -1) && arr[pivot][j] != -1))
            {
                arr[i][j] = (arr[i][pivot] + arr[pivot][j]);
                arr[j][i] = (arr[i][pivot] + arr[pivot][j]);
            }
        }
    }
}

floyd>
 * * * Program successfully started and correct prompt received.

floyd 2 0 14 14 0
0 14 14 0
floyd>   PASS  : Input "floyd 2 0 14 14 0" produced output "0 14 14 0".

floyd 3 0 85 85 85 0 26 85 26 0
0 85 85 85 0 26 85 26 0
floyd>   PASS  : Input "floyd 3 0 85 85 85 0 26 85 26 0" produced output "0 85 85 85 0 26 85 26 0".

floyd 3 0 34 7 34 0 -1 7 -1 0
0 34 7 34 0 -1 7 -1 0
floyd>   FAIL  : Input "floyd 3 0 34 7 34 0 -1 7 -1 0" did not produce output "0 34 7 34 0 41 7 41 0".

floyd 4 0 -1 27 98 -1 0 41 74 27 41 0 41 98 74 41 0
0 -1 27 68 -1 0 41 74 27 41 0 41 68 74 41 0
floyd>   FAIL  : Input "floyd 4 0 -1 27 98 -1 0 41 74 27 41 0 41 98 74 41 0" did not produce output "0 68 27 68 68 0 41 74 27 41 0 41 68 74 41 0".