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EGE27-2A

#1
f = open('271.txt')
n = int(f.readline())
cnt = 0
v = []
for _ in range(n):
    v.append(int(f.readline()))

for i in range(n):
    for j in range(i+1, n):
        a, b = v[i], v[j]
        ab = a*b
        if ab%(10**6) == 0 and ab%(10**7) != 0: cnt += 1
        
print(cnt)

#2
f = open('27-45792A.txt')
n = int(f.readline())
cnt = 0
v = []
for _ in range(n):
    v.append(int(f.readline()))

for i in range(n):
    for j in range(i+1, n):
        a, b = v[i], v[j]
        if (a+b)%11 == 0 and a*b%2310 == 0: cnt += 1
        
print(cnt)

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