سوال الگوی عددی مسابقه شماره 3

n = int(input())
a = []
d = []
do = []
l = 0
l = int(input())
a = a + [l]
for i in range(1, n):
    r = int(input())
    a = a + [r]
    d = d + [r - l]
    l = r
i = 0
po = len(d)
while i < po:
    do = do + [d[i]]

    l = 0
    for u in range(i + 1, len(d)):
        if d[u] != do[u % (i + 1)]:
            l = 1
            break
    if l == 0:
        for t in range(0, len(do)):
            if do[t] >= 0:
                a = '+' + str(do[t])
                print(a)
            else:
                print(do[t])
        break
    i = i + 1