N = int(input())
B = list(map(int, input().split()))
L = [[] for _ in range(max(B)+1)]
for i in range(N):
    L[B[i]].append(i)
ans = 0
for i in range(2, len(L)):
    if len(L[i]) > 0:
        for j in L[i]:
            for _ in range(i-1):
                tmp = L[0].pop()
                ans += abs(tmp - j)
print(ans)