Buggy python submission (verdict: Time Limit Exceeded):
import sys

N = int(input().rstrip('\n'))
S = [str(input().rstrip('\n')) for _ in range(N)]

plus_stock = []
minus_stock = []
for i, row in enumerate(S):
    lowest = 0
    now = 0
    for j,char in enumerate(row):
        if char == "(":
            now+=1
        elif char == ")":
            now-=1 
        if now < lowest:
            lowest = now
    if now >= 0:
        plus_stock.append([now, lowest])
    elif now < 0:
        minus_stock.append([-now, lowest - now])
plus_stock  = sorted(plus_stock, key = lambda x:x[1], reverse=True)
minus_stock = sorted(minus_stock, key = lambda x:x[1], reverse=True)

now = 0

for i in range(len(plus_stock)):
    if now + plus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+plus_stock[i][0]
last = now
now = 0
for i in range(len(minus_stock)):
    if now + minus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+minus_stock[i][0]
if last == now:
    print("Yes")
else:
    print("No")
    

Fixed submission:
import sys
N = int(input().rstrip('\n'))
S = [str(input().rstrip('\n')) for _ in range(N)]

plus_stock = []
minus_stock = []
for i, row in enumerate(S):
    lowest = 0
    now = 0
    for j,char in enumerate(row):
        if char == "(":
            now+=1
        elif char == ")":
            now-=1 
        if now < lowest:
            lowest = now
    if now >= 0:
        plus_stock.append([now, lowest])
    elif now < 0:
        minus_stock.append([-now, lowest - now])
plus_stock  = sorted(plus_stock, key = lambda x:x[1], reverse=True)
minus_stock = sorted(minus_stock, key = lambda x:x[1], reverse=True)

now = 0

for i in range(len(plus_stock)):
    if now + plus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+plus_stock[i][0]
last = now
now = 0
for i in range(len(minus_stock)):
    if now + minus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+minus_stock[i][0]
if last == now:
    print("Yes")
else:
    print("No")

Buggy python submission (verdict: Runtime Error):
import sys
N = int(f.input())
S = [str(f.input()) for _ in range(N)]

plus_stock = []
minus_stock = []
for i, row in enumerate(S):
    lowest = 0
    now = 0
    for j,char in enumerate(row):
        if char == "(":
            now+=1
        elif char == ")":
            now-=1 
        if now < lowest:
            lowest = now
    if now >= 0:
        plus_stock.append([now, lowest])
    else:
        minus_stock.append([-now, lowest - now])
plus_stock  = sorted(plus_stock, key = lambda x:x[1])
minus_stock = sorted(minus_stock, key = lambda x:x[1])

now = 0

for i in range(len(plus_stock)):
    if now + plus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+plus_stock[i][0]
last = now
now = 0
for i in range(len(minus_stock)):
    if now + minus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+minus_stock[i][0]
if last == now:
    print("Yes")
else:
    print("No")

Fixed submission:
import sys
N = int(input().rstrip('\n'))
S = [str(input().rstrip('\n')) for _ in range(N)]

plus_stock = []
minus_stock = []
for i, row in enumerate(S):
    lowest = 0
    now = 0
    for j,char in enumerate(row):
        if char == "(":
            now+=1
        elif char == ")":
            now-=1 
        if now < lowest:
            lowest = now
    if now >= 0:
        plus_stock.append([now, lowest])
    elif now < 0:
        minus_stock.append([-now, lowest - now])
plus_stock  = sorted(plus_stock, key = lambda x:x[1], reverse=True)
minus_stock = sorted(minus_stock, key = lambda x:x[1], reverse=True)

now = 0

for i in range(len(plus_stock)):
    if now + plus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+plus_stock[i][0]
last = now
now = 0
for i in range(len(minus_stock)):
    if now + minus_stock[i][1] < 0:
        print("No")
        sys.exit()
    else:
        now = now+minus_stock[i][0]
if last == now:
    print("Yes")
else:
    print("No")