Buggy python submission (verdict: Runtime Error):
import sys
import decimal
import numpy as np
input = sys.stdin.readline

N = int(input())
A = []
C2 = np.array([[0 for j in range(14)] for i in range(14)])  # 10countは9タス
C5 = np.array([[0 for j in range(14)] for i in range(14)])
C10 = np.zeros(14)
for _ in range(N):
    i = decimal.Decimal(input())
    c10, c2, c5 = 0, 0, 0
    while i % 1 != 0:
        c10 -= 1
        i *= 10
    while i % 10 == 0:
        c10 += 1
        i /= 10
    while i % 2 == 0:
        c2 += 1
        i /= 2
    while i % 5 == 0:
        c5 += 1
        i /= 5
    c2 = min(c2, 13)
    c5 = min(c5, 13)
    A.append((c10, c2, c5))
    C2[c10+9][c2] += 1
    C5[c10+9][c5] += 1
    C10[c10+9] += 1

for i in range(14):
    for j in range(12, -1, -1):
        C2[i][j] += C2[i][j + 1]
        C5[i][j] += C5[i][j + 1]
for i in range(12, -1, -1):
    C10[i] += C10[i+1]

ans = 0
for c10, c2, c5 in A:
    if c10 >= 0:
        ans -= 1
    if c10>=-4:
        ans += C10[-c10 + 9]
    if c5 == 0:
        for i in range(-c10 + 9):
            shouldhave = (-c10+9) - i
            if shouldhave <= c2:
                ans += C5[i][shouldhave]
    elif c2 == 0:
        for i in range(-c10 + 9):
            shouldhave = (-c10 + 9) - i
            if shouldhave <= c5:
                ans += C2[i][shouldhave]
print(int(ans//2))


Fixed submission:
import sys
import decimal
import numpy as np
input = sys.stdin.readline

N = int(input())
A = []
C2 = np.array([[0 for j in range(30)] for i in range(14)])  # 10countは9タス
C5 = np.array([[0 for j in range(30)] for i in range(14)])
C10 = np.zeros(14)
for _ in range(N):
    i = decimal.Decimal(input())
    c10, c2, c5 = 0, 0, 0
    while i % 1 != 0:
        c10 -= 1
        i *= 10
    while i % 10 == 0:
        c10 += 1
        i /= 10
    while i % 2 == 0:
        c2 += 1
        i /= 2
    while i % 5 == 0:
        c5 += 1
        i /= 5
    c2 = min(c2, 30)
    c5 = min(c5, 30)
    A.append((c10, c2, c5))
    C2[c10+9][c2] += 1
    C5[c10+9][c5] += 1
    C10[c10+9] += 1

ans = 0
for i in range(14):
    ans += C10[i]*np.sum(C10[18-i:])
    if i >= 9:
        ans -= C10[i]
    for j in range(18-i):
        if j >= 14:
            continue
        for k in range(1, 30):
            shouldhave = 18 - i - j
            if k >= shouldhave:
                ans += C2[i][k] * np.sum(C5[j][shouldhave:])
                ans += C5[i][k] * np.sum(C2[j][shouldhave:])

print(int(ans//2))

Buggy python submission (verdict: Runtime Error):
import sys
import decimal
import numpy as np
input = sys.stdin.readline

N = int(input())
kizyun = 1e-9
A = []
C2 = np.array([[0 for j in range(14)] for i in range(14)])  # 10countは9タス
C5 = np.array([[0 for j in range(14)] for i in range(14)])
for _ in range(N):
    i = decimal.Decimal(input())
    c10, c2, c5 = 0, 0, 0
    while i%1!=0:
        c10 -= 1
        i *= 10
    while i % 10 == 0:
        c10 += 1
        i /= 10
    while i % 2 == 0:
        c2 += 1
        i /= 2
    while i % 5 == 0:
        c5 += 1
        i /= 5
    c2 = min(c2, 13)
    c5 = min(c5, 13)
    A.append((c10, c2, c5))
    C2[c10+9][c2] += 1
    C5[c10+9][c5] += 1

ans = 0
for c10, c2, c5 in A:
    if c10 >= 0:
        ans -= 1
    ans += np.sum(C2[-c10 + 9:])
    if c5 == 0:
        for i in range(-c10 + 9):
            shouldhave = (-c10+9) - i
            if shouldhave <= c2:
                ans += np.sum(C5[i][shouldhave:])
    elif c2 == 0:
        for i in range(-c10 + 9):
            shouldhave = (-c10 + 9) - i
            if shouldhave <= c5:
                ans += np.sum(C2[i][shouldhave:])
print(ans//2)

Fixed submission:
import sys
import decimal
import numpy as np
input = sys.stdin.readline

N = int(input())
A = []
C2 = np.array([[0 for j in range(30)] for i in range(14)])  # 10countは9タス
C5 = np.array([[0 for j in range(30)] for i in range(14)])
C10 = np.zeros(14)
for _ in range(N):
    i = decimal.Decimal(input())
    c10, c2, c5 = 0, 0, 0
    while i % 1 != 0:
        c10 -= 1
        i *= 10
    while i % 10 == 0:
        c10 += 1
        i /= 10
    while i % 2 == 0:
        c2 += 1
        i /= 2
    while i % 5 == 0:
        c5 += 1
        i /= 5
    c2 = min(c2, 30)
    c5 = min(c5, 30)
    A.append((c10, c2, c5))
    C2[c10+9][c2] += 1
    C5[c10+9][c5] += 1
    C10[c10+9] += 1

ans = 0
for i in range(14):
    ans += C10[i]*np.sum(C10[18-i:])
    if i >= 9:
        ans -= C10[i]
    for j in range(18-i):
        if j >= 14:
            continue
        for k in range(1, 30):
            shouldhave = 18 - i - j
            if k >= shouldhave:
                ans += C2[i][k] * np.sum(C5[j][shouldhave:])
                ans += C5[i][k] * np.sum(C2[j][shouldhave:])

print(int(ans//2))