Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):

n=int(input())
list=[]
word=input()
list.append(list,word)
key=word[-1]
for i in range(1,n):
    word=input()
    if key==word[0] and (word not in list):
        list.append(list,word)
        key=word[-1]
    else:
        print("No")
print("Yes")



Fixed submission:
n=int(input())
list=[]
word=input()
list.append(word)
key=word[-1]
flag=True
for i in range(1,n):
    word=input()
    if key==word[0] and (word not in list):
        list.append(word)
        key=word[-1]
    else:
        print("No")
        flag=False
        break
if flag:
    print("Yes")

Buggy python submission (verdict: Runtime Error):

n=input()
word=input()
key=word[-1]
for i in range(1,n):
    word=input()
    if key==word[0]:
        key=word[-1]
    else:
        print("No")
print("Yes")


Fixed submission:
n=int(input())
list=[]
word=input()
list.append(word)
key=word[-1]
flag=True
for i in range(1,n):
    word=input()
    if key==word[0] and (word not in list):
        list.append(word)
        key=word[-1]
    else:
        print("No")
        flag=False
        break
if flag:
    print("Yes")
Buggy python submission (verdict: Runtime Error):
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)

def gcd(a,b):
    if b==0:return a
    return gcd(b,a%b)

gcd=gcd(first_distance[0],first_distance[1])
for i in range(2,n):
    gcd=gcd(gcd,first_distance[i])
print(gcd)

Fixed submission:
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)

def gcd(a,b):
    if b==0:return a
    return gcd(b,a%b)


if n==1:
    print(first_distance[0])
else:
    element = gcd(first_distance[0], first_distance[1])
    if n==2:print(element)
    else:
        for i in range(2,n):
            element=gcd(element,first_distance[i])
        print(element)

Buggy python submission (verdict: Runtime Error):
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)

gcd=gcd(first_distance[0],first_distance[1])
for i in range(2,n):
    gcd=gcd(gcd,first_distance[i])
print(gcd)

Fixed submission:
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)

def gcd(a,b):
    if b==0:return a
    return gcd(b,a%b)


if n==1:
    print(first_distance[0])
else:
    element = gcd(first_distance[0], first_distance[1])
    if n==2:print(element)
    else:
        for i in range(2,n):
            element=gcd(element,first_distance[i])
        print(element)

Buggy python submission (verdict: Time Limit Exceeded):
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)


for i in range(min_distance,0,-1):
    Can_go_list=list(map(lambda z: 1 if z % i == 0 else 0,first_distance))

    if 0 not in Can_go_list:
        ans = i
        print(ans)
        break


Fixed submission:
num_str=input().split()
num=list(map(int, num_str))
n=num[0]
x=num[1]
num2_str=input().split()
distance=list(map(int, num2_str))

first_distance=list(map(lambda y:abs(y-x),distance))
min_distance=min(first_distance)

def gcd(a,b):
    if b==0:return a
    return gcd(b,a%b)


if n==1:
    print(first_distance[0])
else:
    element = gcd(first_distance[0], first_distance[1])
    if n==2:print(element)
    else:
        for i in range(2,n):
            element=gcd(element,first_distance[i])
        print(element)
Buggy python submission (verdict: Runtime Error):
s=input().split()
num=int(input())
ans = ""
for i in range(0, len(s[0]) + 1, num ):
  ans=ans+s[0][i]
print(ans)

Fixed submission:
s=input().split()
num=int(input())
ans = ""
for i in range(0, len(s[0]), num):
  ans=ans+s[0][i]
print(ans)

Buggy python submission (verdict: Runtime Error):
s=input().split()
num=int(input())
ans = []
for i <= len(s) in range(0, len(s) / num + 1):
  ans = ans.append(s[i])
print(ans)

Fixed submission:
s=input().split()
num=int(input())
ans = ""
for i in range(0, len(s[0]), num):
  ans=ans+s[0][i]
print(ans)
Buggy python submission (verdict: Runtime Error):
n=int(input())
num=int(input().split())
print(max(num)-min(num))

Fixed submission:
n=int(input())
num_str=input().split()
num=list(map(int, num_str))
print(max(num)-min(num))

Buggy python submission (verdict: Runtime Error):
n=int(input())
num=input().split()
print(max(num)-min(num))

Fixed submission:
n=int(input())
num_str=input().split()
num=list(map(int, num_str))
print(max(num)-min(num))

Buggy python submission (verdict: Runtime Error):
n=int(input())
num=input.split()
print(num.max()-num.min())

Fixed submission:
n=int(input())
num_str=input().split()
num=list(map(int, num_str))
print(max(num)-min(num))
Buggy python submission (verdict: Runtime Error):
N = input()
if N >1000:
    print("ABC")
else:
    print("ABD")

Fixed submission:
N = int(input())
if N <= 999:
    print("ABC")
else:
    print("ABD")

Buggy python submission (verdict: Runtime Error):
N = input
if N >1000:
    print("ABC")
else:
    print("ABD")

Fixed submission:
N = int(input())
if N <= 999:
    print("ABC")
else:
    print("ABD")

Buggy python submission (verdict: Runtime Error):
N = input
if n >1000:
    print("ABC")
else:
    print("ABD")



Fixed submission:
N = int(input())
if N <= 999:
    print("ABC")
else:
    print("ABD")
Buggy python submission (verdict: Runtime Error):
N=input()

for i in range(len(N)):
  if(N[i]=="1!):
     print("9", end="")
  if(N[i]=="9!):
     print("1", end="")


Fixed submission:
N=input()
 
for i in range(len(N)):
  if(N[i]=="1"):
     print("9", end="")
  if(N[i]=="9"):
     print("1", end="")
Buggy python submission (verdict: Runtime Error):
N=int(input())

ans=0
while(True):
   ans+=111
  if(ans>=N):
    print(ans)
    break
  

Fixed submission:
N=int(input())
 
ans=0

while(True):
  ans+=111
  if(ans>=N):
    print(ans)
    break
Buggy python submission (verdict: Runtime Error):
def main():
    S = input()
    judge = True
    if S[0] == "A":
        S[0] = S[0].lower()
    else:
        judge = False
    if S[1] == "C":
        judge = False
    if S[2:-2].count("C") == 1:
        for n, i in enumerate(S):
            if 2 <= n <= len(S) - 1:
                if i == "C":
                    S[n] = S[n].lower()
    else:
        judge = False
    if S[-1] == "C":
        judge = False
    if S.islower() == False:
        judge = False
    if judge:
        print("AC")
    else:
        print("WA")


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3


def main():
    S = list(input())
    judge = True
    if S[0] == "A":
        S[0] = S[0].lower()
    else:
        judge = False
    if S[1] == "C":
        judge = False
    if S[2:-1].count("C") == 1:
        for n, i in enumerate(S):
            if 2 <= n <= len(S) - 1:
                if i == "C":
                    S[n] = S[n].lower()
    else:
        judge = False
    if S[-1] == "C":
        judge = False
    S = "".join(S)
    if S.islower() == False:
        judge = False
    if judge:
        print("AC")
    else:
        print("WA")


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
#!/usr/bin/env python3


def main():
    S = input()
    judge = 0
    t = S
    if S[0] == "A":
        judge += 1
        S[0] = S[0].lower()
    else:
        print("WA")
        exit()
    if S[1] == "C":
        print("WA")
        exit()
    if S[2:-2].count("C") == 1:
        judge += 1
        for n, i in enumerate(S[2:-2]):
            n += 3
            if i == "C":
                S[n] = S[n].lower()
    else:
        print("WA")
        exit()
    if S[-1] == "C":
        print("WA")
        exit()
    if S.islower():
        judge += 1
    else:
        print("WA")
        exit()
    if judge == 3:
        print("AC")
    else:
        print("WA")
        exit()


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3


def main():
    S = list(input())
    judge = True
    if S[0] == "A":
        S[0] = S[0].lower()
    else:
        judge = False
    if S[1] == "C":
        judge = False
    if S[2:-1].count("C") == 1:
        for n, i in enumerate(S):
            if 2 <= n <= len(S) - 1:
                if i == "C":
                    S[n] = S[n].lower()
    else:
        judge = False
    if S[-1] == "C":
        judge = False
    S = "".join(S)
    if S.islower() == False:
        judge = False
    if judge:
        print("AC")
    else:
        print("WA")


if __name__ == '__main__':
    main()
Buggy python submission (verdict: Runtime Error):
A,B,C=map(int,input().split())

li=[A,B,C]

max_num=max(li)
max_num2=-10000

for i in li:
    if max_num!=i and max_num2<i:
        max_num2=i
        
num1=int(str(max_num)+str(max_num2))
li.remove(max_num)
li.remove(max_num2)

print(int(num1)+li[0])

Fixed submission:
A,B,C=map(int,input().split())

li=[A,B,C]

max_num=max(li)
max_num2=min(li)

for i in li:
    if max_num!=i and max_num2<i:
        max_num2=i
        
num1=int(str(max_num)+str(max_num2))
li.remove(max_num)
li.remove(max_num2)

print(int(num1)+li[0])

Buggy python submission (verdict: Runtime Error):
A,B,C=map(int,input().split())

li=[A,B,C]

max_num=max(li)
max_num2=-10000

for i in range(3):
    if max_num!=i and max_num2<i:
        max_num2=i
        
num1=str(max_num)+str(max_num2)
li.remove(max_num)
li.remove(max_num2)

print(int(num1)+li[0])

Fixed submission:
A,B,C=map(int,input().split())

li=[A,B,C]

max_num=max(li)
max_num2=min(li)

for i in li:
    if max_num!=i and max_num2<i:
        max_num2=i
        
num1=int(str(max_num)+str(max_num2))
li.remove(max_num)
li.remove(max_num2)

print(int(num1)+li[0])
Buggy python submission (verdict: Runtime Error):
import math



H,W=(int(i) for i in input().split())
li=[]
for i in range(0,H):
    li2=[]
    S1=input()
    for j in range(0,W):
        li2.append(S1[j])
        #print(li2)

    li.append(li2)
    
#print(li)
Flag=False
#横探索
for i in range(0,H):
    
    for j in range(0,W):
        if (li[i][j]=="." or li[i][j]=="Remove"):
            Flag=True
        else:
            Flag=False
            break

    if Flag==True:
         for j in range(0,W):
            li[i][j]="Remove"
          


    
#横探索
for i in range(0,W):
    
    for j in range(0,H):
         if (li[j][i]=="." or li[j][i]=="Remove"):
            Flag=True
         else:
            Flag=False
            break

    if Flag==True:
         for j in range(0,H):
            li[j][i]="Remove"
       
for i in range(0,H):
    for j in range(0,W):
        if (li[i][j]=="Remove"):
            li[i][j]=""

#print("ans")
for i in range(0,H):
    for j in range(0,W):
        if (li[j][i]=="."):
            Flag=True
        else:
            Flag=False
        print(str(li[i][j]),end="")

    if Flag==False:
        print("")   



Fixed submission:
import math

H,W=(int(i) for i in input().split())
li=[]
for i in range(0,H):
    li2=[]
    S1=input()
    for j in range(0,W):
        li2.append(S1[j])
        #print(li2)

    li.append(li2)
    
#print(li)
Flag=False
#横探索
for i in range(0,H):
    
    for j in range(0,W):
        if (li[i][j]=="." or li[i][j]=="Remove"):
            Flag=True
        else:
            Flag=False
            break

    if Flag==True:
         for j in range(0,W):
            li[i][j]="Remove"
          


    
#横探索
for i in range(0,W):
    
    for j in range(0,H):
         if (li[j][i]=="." or li[j][i]=="Remove"):
            Flag=True
         else:
            Flag=False
            break

    if Flag==True:
         for j in range(0,H):
            li[j][i]="Remove"
       
for i in range(0,H):
    for j in range(0,W):
        if (li[i][j]=="Remove"):
            li[i][j]=""

#print("ans")
for i in range(0,H):
    count=0
    for j in range(0,W):
        
        if (li[i][j]==""):
            Flag=True
            count+=1
        else:
            Flag=False
        
        print(str(li[i][j]),end="")

    if count!=W:
        print("")
Buggy python submission (verdict: Runtime Error):
N=input()
Nstring=str(N)
i=0
S=0#各桁の輪
while i<len(Nstring):
    S+=int(Nstring[i])
    i+=1

if N%S==0:
    print("Yes")
else:
    print("No")


Fixed submission:
N=int(input())
Nstring=str(N)
i=0
S=0#各桁の輪
while i<len(Nstring):
    S+=int(Nstring[i])
    i+=1

if N%S==0:
    print("Yes")
else:
    print("No")
Buggy python submission (verdict: Time Limit Exceeded):
N,K=(int(i) for i in input().split())
A = list(int(i) for i in input().split())  
minNum=0
i=0
A2=[]
ans=0

A2.extend(A[i:i+K])
while i<N:    
    #print(A2)
    minNum=int(min(A2))
   # print(minNum)
    j=i
    #特定範囲の最小化
    while j<i+K:
        #途中でオーバーしたら逃げる
        if len(A2)<=j:
            break
        #print(A2[j])
        A2[j]=minNum
        j+=1
    if i==0:
        i=i+K
    else:
        i=i+K-1

    ans+=1
    A2.extend(A[i:i+K-1])

#print(A2)
print(ans)    



Fixed submission:
N,K=(int(i) for i in input().split())
A = list(int(i) for i in input().split())  
minNum=0
i=0
A2=[]
ans=0

while i<N:    
   
    if i==0:
        i=i+K
    else:
        i=i+K-1

    ans+=1
    
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import collections
    
N=int(input())
S=str(input())
#W=左
#E=右
ans=[]
for i in range(1,N-1):        
    c1=collections.Counter(S[0:i-1])
    c2=collections.Counter(S[i:N])
    ans.append(c1["W"]+c2["E"])
     
print(min(ans))

Fixed submission:
N=int(input())
S=str(input())
#W=左
#E=右
ans=[]
count=0
#一番左
for i in range(1,N):
    
    if S[i]=="E":
        count+=1    
        
        
ans.append(count)


for i in range(1,N):
    
    if S[i-1]=="W":
        count+=1
    if S[i]=="E":
        count-=1

    ans.append(count)

print(min(ans))

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
S=str(input())
#W=左
#E=右
ans=[]
for i in range(1,N-1):
    count=0
    ans.append(S[0:i-1].count("W")+S[i:N].count("E"))


print(min(ans))


Fixed submission:
N=int(input())
S=str(input())
#W=左
#E=右
ans=[]
count=0
#一番左
for i in range(1,N):
    
    if S[i]=="E":
        count+=1    
        
        
ans.append(count)


for i in range(1,N):
    
    if S[i-1]=="W":
        count+=1
    if S[i]=="E":
        count-=1

    ans.append(count)

print(min(ans))

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())

S=str(input())

#W=左
#E=右
ans=1000000000000
for i in range(N-1):
    count=0
    SL="".join(S[0:i])
    SR="".join(S[i+1:len(S)])
    #print(SL+"と"+SR)
    #print(SL.count("W"))
    #print(SR.count("E"))
    count=SL.count("W")+SR.count("E")
    ans=min(ans,count)

print(ans)

Fixed submission:
N=int(input())
S=str(input())
#W=左
#E=右
ans=[]
count=0
#一番左
for i in range(1,N):
    
    if S[i]=="E":
        count+=1    
        
        
ans.append(count)


for i in range(1,N):
    
    if S[i-1]=="W":
        count+=1
    if S[i]=="E":
        count-=1

    ans.append(count)

print(min(ans))
Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())

power=1
i=1
for i in range(1,N+1):
    power*=i


ans=power%(1000000000+7)
print(ans)

Fixed submission:
import math
N=int(input())

power=math.factorial(N)

ans=power%(1000000000+7)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())

power=1
i=1
while i<=N: 
    power=power*i
    i+=1

ans=power%(1000000000+7)
print(ans)

Fixed submission:
import math
N=int(input())

power=math.factorial(N)

ans=power%(1000000000+7)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())

power=1

for i in range(1,N+1):
    power=power*i

ans=power%(1000000000+7)
print(ans)

Fixed submission:
import math
N=int(input())

power=math.factorial(N)

ans=power%(1000000000+7)
print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
A = list(map(int, input().strip().split()))
min_n = max_n = A[0]
for i in range(1, N):
	num = A[i]
	if min_n > num:
		min_n = num
	if max_n < num:
		max_n = num
result = max_n - min_n
print(result)
		

Fixed submission:
N = int(input())
result = N if N&1==0 else N<<1
print(result)
Buggy python submission (verdict: Runtime Error):
import sys
n = int (input())
words = []
for i in range (n) :
    words.append(input())
for x in range(len(words)):
    if words.count(words[x]) > 1 or words[x+1][0] != words[x][-1]:
        print("No")
        sys.exit()
    else:
        "Yes"

Fixed submission:
import sys
n = int (input())
words = []
No=" "
for i in range (n) :
    words.append(input())
for x in range(len(words)-1):
    if words.count(words[x]) > 1 or words[x+1][0] != words[x][-1]:
        No="No"
        print (No)
        sys.exit() 
if No != "No":
     print ("Yes")

Buggy python submission (verdict: Runtime Error):
import sys
n = int (input())
words = []
for i in range (n) :
    words.append(input())
for x in range(len(words)):
    if words.count(words[x]) > 1 or words[x+1][0] != words[x][-1]:
        print("No")
        sys.exit()
    else:
        "Yes"

Fixed submission:
import sys
n = int (input())
words = []
No=" "
for i in range (n) :
    words.append(input())
for x in range(len(words)-1):
    if words.count(words[x]) > 1 or words[x+1][0] != words[x][-1]:
        No="No"
        print (No)
        sys.exit() 
if No != "No":
     print ("Yes")
Buggy python submission (verdict: Runtime Error):
 n = int(input())
q = int(n / 111)
if n % 111 == 0:
  i = q
else:
  i = q + 1
print(i * 111)

Fixed submission:
n = int(input())
q = int(n / 111)
if n % 111 == 0:
  i = q
else:
  i = q + 1
print(i * 111)
Buggy python submission (verdict: Runtime Error):
import math
import functools

def main():
    N,X = (int(i) for i in input().split())
    x=list(map(int,input().split()))

    gcd_l = []
    gcd_l.append(abs(X-x[0]))

    for i in range(1,N):
        gcd_l.append(abs(x[i-1]-x[i]))

    print(functools.reduce(math.gcd,gcd_l))

main()

Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a

def main():
    N,X = (int(i) for i in input().split())
    x=list(map(int,input().split()))

    gcd_l = []
    #gcd_l.append(abs(X-x[0]))

    for i in range(0,N):
        gcd_l.append(abs(X-x[i]))
    if N==1:
        ans = gcd_l[0]
    else:
        a = [gcd_l[0],gcd_l[1]]
        ans = gcd(max(a),min(a))
        for n in range(2,len(gcd_l)):
            a = [ans,gcd_l[n]]
            ans = gcd(max(a),min(a))
    print(ans)

main()

Buggy python submission (verdict: Runtime Error):
import math
from functools import reduce

def main():
    N,X = (int(i) for i in input().split())
    x=list(map(int,input().split()))

    gcd_l = []
    gcd_l.append(abs(X-x[0]))

    for i in range(1,N):
        gcd_l.append(abs(x[i-1]-x[i]))

    print(reduce(math.gcd,gcd_l))

main()

Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a

def main():
    N,X = (int(i) for i in input().split())
    x=list(map(int,input().split()))

    gcd_l = []
    #gcd_l.append(abs(X-x[0]))

    for i in range(0,N):
        gcd_l.append(abs(X-x[i]))
    if N==1:
        ans = gcd_l[0]
    else:
        a = [gcd_l[0],gcd_l[1]]
        ans = gcd(max(a),min(a))
        for n in range(2,len(gcd_l)):
            a = [ans,gcd_l[n]]
            ans = gcd(max(a),min(a))
    print(ans)

main()

Buggy python submission (verdict: Runtime Error):
import math
from functools import reduce

N,X = (int(i) for i in input().split())
x=list(map(int,input().split()))

gcd_l = []
gcd_l.append(abs(X-x[0]))

for i in range(1,N):
    gcd_l.append(abs(x[i-1]-x[i]))

print(reduce(math.gcd,gcd_l))

Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a

def main():
    N,X = (int(i) for i in input().split())
    x=list(map(int,input().split()))

    gcd_l = []
    #gcd_l.append(abs(X-x[0]))

    for i in range(0,N):
        gcd_l.append(abs(X-x[i]))
    if N==1:
        ans = gcd_l[0]
    else:
        a = [gcd_l[0],gcd_l[1]]
        ans = gcd(max(a),min(a))
        for n in range(2,len(gcd_l)):
            a = [ans,gcd_l[n]]
            ans = gcd(max(a),min(a))
    print(ans)

main()
Buggy python submission (verdict: Runtime Error):
def main():
    in1 = input()
    n, m = [int(c) for c in in1]

    arr = []
    for i in range(m):
        _in = input()
        a, b = [int(c) for c in _in]
        arr.append((a, b))

    sorted_arr = sorted(arr, key=lambda x: x[0])

    n = 0

    mi, ma = sorted_arr[0]
    for a, b in sorted_arr[1:]:
        if ma < a:
            n += 1
            mi, ma = a, b
        if mi < a:
            mi = a
        if ma > b:
            ma = b
    print(n)

if __name__ == "__main__":
    main()


Fixed submission:
def main():
    in1 = input().split(" ")
    n, m = [int(c) for c in in1]

    arr = []
    for i in range(m):
        _in = input().split(" ")
        a, b = [int(c) for c in _in]
        arr.append((a, b))

    sorted_arr = sorted(arr, key=lambda x: x[0])

    n = 1

    mi, ma = sorted_arr[0]
    mi, ma = (mi, ma) if mi < ma else (ma, mi)
    for a, b in sorted_arr[1:]:
        a, b = (a, b) if a < b else (b, a)
        if ma <= a:
            n += 1
            mi, ma = a, b
        if mi < a:
            mi = a
        if ma > b:
            ma = b
    print(n)

if __name__ == "__main__":
    main()
Buggy python submission (verdict: Runtime Error):
def read():
    return raw_input()


def write(message):
    import sys
    print(message)
    sys.stdout.flush()


if __name__ == '__main__':
    N = int(read())
    write("ABD" if N > 999 else "ABC")


Fixed submission:
def read():
    return raw_input()


def write(message):
    import sys
    print message
    sys.stdout.flush()


if __name__ == '__main__':
    N = int(read())
    write("ABD" if N > 999 else "ABC")
Buggy python submission (verdict: Runtime Error):
d = input().rstrip()
d_list = d.split(" ")
t_list = []
for i in range(int(d_list[1])):
    t_list.append(str(input().rstrip()))


def solution(t_list):
    t_list.sort()
    ans_str = ""
    for i in t_list:
        ans_str += i
    return ans_str
    
def main():
    print(solution(t_list))
    
if __name__ == '__main__':
    main()

Fixed submission:
import sys
t_list = []
for i in sys.stdin.readlines():
    t_list.append(i.rstrip())
t_list.pop(0)

def solution(t_list):
    t_list.sort()
    ans_str = ""
    for i in t_list:
        ans_str += i
    return ans_str
    
def main():
    print(solution(t_list))
    
if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
d = input().rstrip()
d_list = d.split(" ")
t_list = []
for i in range(int(d_list[1])):
    t_list.append(input().rstrip())


def solution(t_list):
    t_list.sort()
    ans_str = ""
    for i in t_list:
        ans_str += i
    return ans_str
    
def main():
    print(solution(t_list))
    
if __name__ == '__main__':
    main()

Fixed submission:
import sys
t_list = []
for i in sys.stdin.readlines():
    t_list.append(i.rstrip())
t_list.pop(0)

def solution(t_list):
    t_list.sort()
    ans_str = ""
    for i in t_list:
        ans_str += i
    return ans_str
    
def main():
    print(solution(t_list))
    
if __name__ == '__main__':
    main()