Untitled

def a(n):
    xa=0
    for i in range(len(n)):
        xa+=n[i]
    return xa
def b(n):
    xb=0
    while len(n)!=0:
        xb+=n[0]
        n.pop(0)
    return xb
def c(n):
    if len(n)==0:
        return 0
    else:
        k=n[0]
        n.pop(0)
        return c(n)+k
n=list(map(int,input().split(' ')))
print(a(n))
print(b(n))
print(c(n))