10
-405 -230 252 -393 -390 -259 97 163 81 -129
 3
10000 -10000 10000
 1
-10000
 20
-16 -23 29 44 -40 -50 -41 34 -38 30 -12 28 -44 -49 15 50 -28 38 -2 0

702.333333333333712
 10000.000000000016371
 0.000000000000000
 113.875000000000043

n = int(input())
li = [int(x) for x in input().split()]

s = 0
for i in li:
    s += i
avg = s/n
for i in range(n):
    li[i] -= avg

#print(li)

max = -1
ans = [0]*n

ans[0] = li[0]
for i in range(1,n):
    if abs(ans[i-1]+li[i]) > abs(li[i]):
        ans[i] = ans[i-1]+li[i]
    else:
        ans[i] = li[i]

#print(ans)

for i in ans:
    if abs(i) > max:
        max = abs(i)

print(max)
