n, m, k = input().split()
n = int(n)
m = int(m)
k = int(k)
dovolnie = 0

while n > 0 or m > 0 or k > 0:
    if n > 0 and m > 0:
        dovolnie = dovolnie + 1
        n = n - 1
        m = m - 1

    elif n > 0 and k > 0:
        dovolnie = dovolnie + 1
        n = n - 1
        k = k - 1

    elif m > 0 and k > 0:
        dovolnie = dovolnie + 1
        m = m - 1
        k = k - 1

    else:
        break


print(dovolnie)