N = int(input())
A = list(map(int,input().split()))
S = ["<" if A[i] < A[i+1] else ">" for i in range(N-1)]
ans = 0
now = 0
for i in range(N-1):
    if(S[i] == "<"):
        now += 1
    else:
        ans += now
print(ans)