N = int(input())
s = list(map(int,input().split()))
t = {}
ss = sorted(s)
ss.reverse()
num = 0
p = 0
for a,b in enumerate(s):
    t[b] = a

for i in range(len(ss)-1):
    if t[ss[i+1]] > t[ss[i]]:
        t[ss[i+1]] = p-1
        p -= 1
        num += 1

print(num)