24421번: 掛け算 (Multiplication) ↗

n=int(input())
l = [*map(int,input().split())]
cnt = 0
for i in range(n):
  for j in range(i+1, n):
    for k in range(j+1, n):
      if l[i] * l[j] == l[k]:
        cnt += 1
print(cnt)