n = int(input())
A = list(map(int,input().split()))
ave = sum(A)/n 
diff = []  
for a in A:
	diff.append(abs(a-ave))
tmp = 0   
d = 10**9
for i in range(n):
	if diff[i] < d:
		d = diff[i]
		tmp = i
print(i)