def solve(x):
    N = x / 1000
    num1 = (x / 100) % 10
    num2 = (x / 10) % 10
    num3 = x % 10

    answer = (2*N + num1) + (N + num2) + (num3)
    return answer

x = input("N & 3dig code: ")
answer = solve(x)
print answer