Статья Автор: Гаджизаде Пери

тетрадб

#1
f = open('27-A(2).txt')
mat = [[0 for i in range(8)] for j in range(8)]
ans = 0
f.readline()
for i in f:
    m, n = 0, 0
    x = int(i)
    for p in range(7, -1, -1):
        if x % (2**p) == 0:
            m = p
            break
    for p in range(7, -1, -1):
        if x % (5**p) == 0:
            n = p
            break
    mat[m][n] += 1
for i in range(3):
    ans += mat[i][7] * mat[6 - i][7]
    ans += mat[7][i] * mat[7][6 - i]
ans += mat[7][3] * (mat[7][3] - 1) // 2
ans += mat[3][7] * (mat[3][7] - 1) // 2
for i in range(7):
    for j in range(7):
        for k in range(6 - j, 8):
            if i != 6 - i or j != k:
                ans += (mat[i][j] * mat[6 - i][k])
            else:
                ans += (mat[i][j] - 1) * mat[i][j] // 2
        for k in range(7 - i, 8):
            if i != k or j != 6 - j:
                ans += (mat[i][j] * mat[k][6 - j])
            else:
                ans += (mat[i][j] - 1) * mat[i][j] // 2
        mat[i][j] = 0
print(ans)

#2
with open('27-45792A.txt') as file:
  n = int(file.readline())
  l = [int(s) for s in file]
count = 0
for i in range(n):
  for j in range(i+1, n):
    if (l[i] +l[j]) % 11 == 0 and (l[i]*l[j]) % 2310 == 0:
      count += 1
print(count)

Прикрепленные файлы
27-45792A.txt
27-A(2).txt

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