def resolve():
    a,b=map(int, input().split())
    if b%a==0:
        print(a+b)
    else:
        print(b-a)
resolve() def resolve():
    a,b=map(int, input().split())
    if b%a==0:
        print(a+b)
    else:
        print(b-a) resolve a,b=map(int, input().split()) a map(int, input().split()) map int input().split() ().split () input split b if b%a==0:
        print(a+b)
    else:
        print(b-a) b%a==0 b%a b a 0 print(a+b) print a+b a b print(b-a) print b-a b a resolve() resolve def resolve():
    a,b=map(int, input().split())
    if b%a==0:
        print(a+b)
    else:
        print(b-a) def resolve():
    a,b=map(int, input().split())
    if b%a==0:
        print(a+b)
    else:
        print(b-a) resolve
def resolve():
    a,b=map(int, input().split())
    if b%a==0:
        print(a+b)
    else:
        print(b-a)
resolve()