from sys import maxsize

def sum_min_pairs(array) :
    l=len(array)
    min1 = maxsize
    min2 = maxsize

    for i in range(l) :

        if (array[i] < min1) :
            min2 = min1
            min1 = array[i]

        elif ((array[i] < min2) and array[i] != min1) :

            min2 = array[i]

    return (min2 + min1)


my_arr = [ 1, 2, 3, 4, 5]

print(sum_min_pairs(my_arr))