N = int(input())

l = list(map(int, input().split()))
l.reverse()
sum = 0            

while len(l) > 0:
    for i in range(len(l)):
        if l[i] == N:
            sum += i
            N -= 1
            l = l[i + 1:]
            break
    else:
        sum += len(l)
        break
    
print(sum)