Buggy python submission (verdict: Runtime Error):
import numpy as np
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))

an_np = np.array(an)
an_col = np.zeros((n-1,n-1))
summary = 0
zero = np.zeros((1,n-1))
for i in range(0, n-1):
    tmp = np.array(an_np[i+1: n])
    an_col[i] = np.append(tmp, zero)[:n-1]

print(int(sum(sum(np.multiply(an_np[:-1], an_col) % m)%m)%m))

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
an_np = np.array(an)
summary = 0
for i in range(0, n-1):
    summary = (summary + sum(np.multiply(an_np[i], an_np[i+1: n]) % m)) % m    
print(summary)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
an_np = np.array(an)
summary = 0
for i in range(0, n-1):
    summary = (summary + sum(an_np[i] * an_np[i+1: n] % m)) % m
print(summary)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
an_np = np.array(an)
summary = 0
for i in range(0, n-1):
    summary = (summary + sum(an_np[i] * an_np[i+1: n])) % m
print(summary)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))

row = np.array([])
col = np.array([])
summary = 0
for i in range(0, n-1):
    for j in range(i+1, n):
        row = np.append(row, an[i])
        col =  np.append(col, an[j])
print(int(np.dot(row, col) % m))

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
an = list(map(int, input().split()))
m = 10**9 + 7
summary = 0
for i in range(0, n-1):
    for j in range(i+1, n):
        summary += (an[i] * an[j]) % m
        summary = summary % m
print(summary)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
an = list(map(int, input().split()))
m = 10**9 + 7
summary = 0
for i in range(0, n-1):
    for j in range(i+1, n):
        summary += (an[i] * an[j]) % m
        summary = summary % m
print(summary)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
an = list(map(int, input().split()))
m = 10**9 + 7
summary = 0
for i in range(0, n-1):
    for j in range(i+1, n):
#         if i == j: continue
#         print(i, j)
        summary += (an[i] * an[j]) % m
#         print(summary)
print(summary % m)

Fixed submission:
m = 10**9 + 7
n = int(input())
an = list(map(int, input().split()))
wa = []
total = 0
for i in reversed(range(1, len(an))):
    total = total + an[i]
    wa.append(total)
wa = sorted(wa, reverse=True)
ans = 0
for i in range(0, n-1):
#     print(an[i] * wa[i])
    ans = ans + an[i] * (wa[i]%m)
    ans = ans % m
print(ans)