Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
N = int(input())
A = list(map(int, input().split()))
A.sort(reverse=True)
B = list(map(int, input().split()))
B.sort(reverse=True)
C = list(map(int, input().split()))
C.sort(reverse=True)
count = [0]*N
answer = 0
z = 0
for i in range(N):
    if B[N-1] >= C[i]:
        break
    z += 1
count[N-1] = z
for i in range(1, N):
    for j in range(z):
        if B[N-1-i] < C[z-1-j]:
            break
        else:

            z -= 1
    count[N-1-i] = z
sum_matrix = [0]*(N+1)
y = 0
for i in range(N):
    sum_matrix[i+1] = sum_matrix[i] + count[i]
for i in range(N):
    if A[N-1] >= B[i]:
        break
    answer += count[i]
    y += 1

for i in range(1, N):
    for j in range(y):
        if A[N-1-i] < B[y-1-j]:
            break        
    y -= j
    answer += sum_matrix[y]
    #print(y)
    #print(answer)
#print(count)
#print(sum_matrix)
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
N = int(input())
A = list(map(int, input().split()))
A.sort(reverse=True)
B = list(map(int, input().split()))
B.sort(reverse=True)
C = list(map(int, input().split()))
C.sort(reverse=True)
count = [0]*N
answer = 0
z = 0
for i in range(N):
    if B[N-1] >= C[i]:
        break
    z += 1
count[N-1] = z
for i in range(1, N):
    k=z
    for j in range(k):
        if B[N-1-i] < C[k-1-j]:
            break
        else:
            z -= 1      
    count[N-1-i] = z
sum_matrix = [0]*(N+1)
y = 0
for i in range(N):
    sum_matrix[i+1] = sum_matrix[i] + count[i]
for i in range(N):
    if A[N-1] >= B[i]:
        break
    answer += count[i]
    y += 1
for i in range(1, N):
    x = y
    for j in range(x):
        if A[N-1-i] < B[x-1-j]:
            break        
        y -= 1
    answer += sum_matrix[y]
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

N = int(input())
A = list(map(int, input().split()))
A.sort()
B = list(map(int, input().split()))
B.sort()
C = list(map(int, input().split()))
C.sort()
count = [0]*N
answer = 0
z = 0

for i in range(N):
    if B[0] >= C[N-i-1]:
        break
    z += 1
count[0] = z
for i in range(1, N):
    x = z
    for j in range(z):
        if B[i] < C[N-z+j]:
            break
        else:
            x -= 1
    count[i] = x
y = 0
for i in range(N):
    if A[0] >= B[N-i-1]:
        break
    answer += count[N-i-1]
    y += 1

for i in range(1, N):

    for j in range(y):
        if A[i] >= B[N-j-1]:
            break
        answer += count[N-j-1]
#print(count)
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
N = int(input())
A = list(map(int, input().split()))
A.sort(reverse=True)
B = list(map(int, input().split()))
B.sort(reverse=True)
C = list(map(int, input().split()))
C.sort(reverse=True)
count = [0]*N
answer = 0
z = 0
for i in range(N):
    if B[N-1] >= C[i]:
        break
    z += 1
count[N-1] = z
for i in range(1, N):
    k=z
    for j in range(k):
        if B[N-1-i] < C[k-1-j]:
            break
        else:
            z -= 1      
    count[N-1-i] = z
sum_matrix = [0]*(N+1)
y = 0
for i in range(N):
    sum_matrix[i+1] = sum_matrix[i] + count[i]
for i in range(N):
    if A[N-1] >= B[i]:
        break
    answer += count[i]
    y += 1
for i in range(1, N):
    x = y
    for j in range(x):
        if A[N-1-i] < B[x-1-j]:
            break        
        y -= 1
    answer += sum_matrix[y]
print(answer)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

N = int(input())
A = list(map(int, input().split()))
A.sort()
B = list(map(int, input().split()))
B.sort()
C = list(map(int, input().split()))
C.sort()
count = [0]*N
answer = 0
for i in range(N):
    x = 0
    for j in range(N):
        if B[i] >= C[N-j-1]:
            break
        x += 1
    count[i] = x

for i in range(N):
    for j in range(N):
        if A[i] >= B[N-j-1]:
            break
        answer += count[N-j-1]
#print(count)
print(answer)

Fixed submission:
import sys
input = sys.stdin.readline
N = int(input())
A = list(map(int, input().split()))
A.sort(reverse=True)
B = list(map(int, input().split()))
B.sort(reverse=True)
C = list(map(int, input().split()))
C.sort(reverse=True)
count = [0]*N
answer = 0
z = 0
for i in range(N):
    if B[N-1] >= C[i]:
        break
    z += 1
count[N-1] = z
for i in range(1, N):
    k=z
    for j in range(k):
        if B[N-1-i] < C[k-1-j]:
            break
        else:
            z -= 1      
    count[N-1-i] = z
sum_matrix = [0]*(N+1)
y = 0
for i in range(N):
    sum_matrix[i+1] = sum_matrix[i] + count[i]
for i in range(N):
    if A[N-1] >= B[i]:
        break
    answer += count[i]
    y += 1
for i in range(1, N):
    x = y
    for j in range(x):
        if A[N-1-i] < B[x-1-j]:
            break        
        y -= 1
    answer += sum_matrix[y]
print(answer)