for (int j=0;j<n;j++)
            {
                if (j!==i)
                {
                    if (a[i][j]<0)  a[i][j]=-a[i][j];
                    sum1+=a[i][j];
                }
            }
        for (int i=0;i<n;j++)
            {
                if (i!==j)
                {
                    if (a[i][j]<0)  {a[i][j]=-a[i][j];}
                    sum2+=a[i][j];
                }
            }
        }
        if (sum2<sum1) {min=sum1;}
    return min;