Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
import heapq
from collections import defaultdict
N = int(input())
nums  = list(map(int, input().split(" ")))
# 正の数、負の数の個数で操作をコントロール？
p_count = 0
m_count = 0
pos = []
minus = []
for num in nums:
    if num < 0:
        m_count += 1
        minus.append(num)
    else:
        p_count += 1
        pos.append(num)
pos.sort()
minus.sort() #小さい順番
途中式 = []
if N == 2:
    print(max(nums) - min(nums))
else:
    #正の数を一つにして、そこから引きまくる
    if m_count == 0: #マイナスが無かったら作る
        x = min(pos)
        y = max(pos)
        途中式.append((x, y))
        minus.append(x - y)
        pos.remove(x)
        pos.remove(y)
        p_count -=2
        m_count += 1

    if p_count > 1: # 正が複数あったら、マイナスから引くことで減らしていく
        for i in range(p_count - 1):
            #マイナスから正が1個になるまで引いていく
            x = minus.pop()
            y = pos.pop()
            途中式.append((x,y))
            minus.append(x- y)
    elif p_count == 0 : #正が一つも無かったら、作る
        x = minus.pop()
        y = minus.pop()
        途中式.append((x, y))
        pos.append(x - y)

    x = pos.pop()
    for i in minus:
        y = i
        途中式.append((x, y))
        x -=y
print(x)
for temp in 途中式:
    x,y = temp
    print(x,y)

Fixed submission:
import heapq
from collections import defaultdict
N = int(input())
nums  = list(map(int, input().split(" ")))
# 正の数、負の数の個数で操作をコントロール？
p_count = 0
m_count = 0
pos = []
minus = []
for num in nums:
    if num < 0:
        m_count += 1
        minus.append(num)
    else:
        p_count += 1
        pos.append(num)
pos.sort()
minus.sort() #小さい順番
途中式 = []
if N == 2:
    x = max(nums) 
    y = min(nums)
    print(max(nums) - min(nums))
    print(x, y)
else:
    #正の数を一つにして、そこから引きまくる
    if m_count == 0: #マイナスが無かったら作る
        x = min(pos)
        y = max(pos)
        途中式.append((x, y))
        minus.append(x - y)
        pos.remove(x)
        pos.remove(y)
        p_count -=2
        m_count += 1

    if p_count > 1: # 正が複数あったら、マイナスから引くことで減らしていく
        for i in range(p_count - 1):
            #マイナスから正が1個になるまで引いていく
            x = minus.pop()
            y = pos.pop()
            途中式.append((x,y))
            minus.append(x- y)
    elif p_count == 0 : #正が一つも無かったら、作る
        x = minus.pop()
        y = minus.pop()
        途中式.append((x, y))
        pos.append(x - y)

    x = pos.pop()
    for i in minus:
        y = i
        途中式.append((x, y))
        x -=y
    print(x)
    for temp in 途中式:
        x,y = temp
        print(x,y)
Buggy python submission (verdict: Time Limit Exceeded):
MOD = 10**9+7
l = input()
n = len(l)
dp = [    [0,0] for _ in range(n + 1)]
dp[0][0]  = 1
#dp[桁数][条件を満たすことが確定しているフラグ]
# 00 10 01

for i in range(1,n +1):
    # (dp[i][flag]のflag,dp[i-1][flag]のflag,i桁目の数字) で繊維は2**3の8通り
    dp[i][1] += dp[i - 1][1] * 3 # i桁目が (0,1) flag が 1 1
    #flag 0→1はない

    if l[i-1] == "1":
        dp[i][0] += dp[i -1][0] * 2 #1,0  or 0,1のときに相変わらず未定
        dp[i][1] += dp[i -1][0] # 0,0のときだけ確定させられる e.g. 101 10 のときに次に0が来れば確定 なので0,0
    else:
        dp[i][0] +=dp[i-1][0] # 0,0 の場合のみ
        # dp[i][1] への遷移は無し
ans = dp[-1][0] + dp[-1][1]
print(ans % MOD)


Fixed submission:
MOD = 10**9+7
l = input()
n = len(l)
dp = [    [0,0] for _ in range(n + 1)]
dp[0][0]  = 1
#dp[桁数][条件を満たすことが確定しているフラグ]
# 00 10 01

for i in range(1,n +1):
    # (dp[i][flag]のflag,dp[i-1][flag]のflag,i桁目の数字) で繊維は2**3の8通り
    dp[i][1] += dp[i - 1][1] * 3 # i桁目が (0,1) flag が 1 1
    #flag 0→1はない

    if l[i-1] == "1":
        dp[i][0] += dp[i -1][0] * 2 #1,0  or 0,1のときに相変わらず未定
        dp[i][1] += dp[i -1][0] # 0,0のときだけ確定させられる e.g. 101 10 のときに次に0が来れば確定 なので0,0
    else:
        dp[i][0] +=dp[i-1][0] # 0,0 の場合のみ
        # dp[i][1] への遷移は無し
    dp[i][0] %= MOD
    dp[i][1] %= MOD
ans = dp[-1][0] + dp[-1][1]
print(ans % MOD)

Buggy python submission (verdict: Time Limit Exceeded):
MOD = 10**9+7
l = input()
n = len(l)
dp = [[0 for _ in range (n + 1) ] for _ in range(n + 1)]
dp[0][0]  = 1
#dp[桁数][条件を満たすことが確定しているフラグ]
# 00 10 01

for i in range(1,n +1):
    # (dp[i][flag]のflag,dp[i-1][flag]のflag,i桁目の数字) で繊維は2**3の8通り
    dp[i][1] += dp[i - 1][1] * 3 # i桁目が (0,1) flag が 1 1
    #flag 0→1はない

    if l[i-1] == "1":
        dp[i][0] += dp[i -1][0] * 2 #1,0  or 0,1のときに相変わらず未定
        dp[i][1] += dp[i -1][0] # 0,0のときだけ確定させられる e.g. 101 10 のときに次に0が来れば確定 なので0,0
    else:
        dp[i][0] +=dp[i-1][0] # 0,0 の場合のみ
        # dp[i][1] への遷移は無し
ans = dp[-1][0] + dp[-1][1]
print(ans % MOD)


Fixed submission:
MOD = 10**9+7
l = input()
n = len(l)
dp = [    [0,0] for _ in range(n + 1)]
dp[0][0]  = 1
#dp[桁数][条件を満たすことが確定しているフラグ]
# 00 10 01

for i in range(1,n +1):
    # (dp[i][flag]のflag,dp[i-1][flag]のflag,i桁目の数字) で繊維は2**3の8通り
    dp[i][1] += dp[i - 1][1] * 3 # i桁目が (0,1) flag が 1 1
    #flag 0→1はない

    if l[i-1] == "1":
        dp[i][0] += dp[i -1][0] * 2 #1,0  or 0,1のときに相変わらず未定
        dp[i][1] += dp[i -1][0] # 0,0のときだけ確定させられる e.g. 101 10 のときに次に0が来れば確定 なので0,0
    else:
        dp[i][0] +=dp[i-1][0] # 0,0 の場合のみ
        # dp[i][1] への遷移は無し
    dp[i][0] %= MOD
    dp[i][1] %= MOD
ans = dp[-1][0] + dp[-1][1]
print(ans % MOD)
Buggy python submission (verdict: Runtime Error):
s = input()
nokori = 15 -len(s)
should = 8 -nokori 
num = s.count("o")
if num >= should:
  print("YES")
else:
  print(""NO)

Fixed submission:
s = input()
nokori = 15 -len(s)
should = 8 -nokori 
num = s.count("o")
if num >= should:
  print("YES")
else:
  print("NO")
Buggy python submission (verdict: Time Limit Exceeded):
import math
def combinations_count(n, r):
    return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))

N,M,K = list(map(int,input().split(" ")))

ans = 0
for i in range(0,N):
    for j in range(0,M):
        mul = 2
        if i == 0 or j == 0:
            mul = 1

        ans += mul * (N -i) * (M -j) * (i+j)

ans *= combinations_count(N*M-2,K-2)
ans %= 10**9 + 7
print(ans)

Fixed submission:
import math
def combinations_count(n, r):
    return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))

N,M,K = list(map(int,input().split(" ")))

ans = 0
for i in range(0,N):
    for j in range(0,M):
        mul = 2
        if i == 0 or j == 0:
            mul = 1

        ans += mul * (N -i) * (M -j) * (i+j)

ans *= combinations_count(N*M-2,K-2)
ans %= 10**9 + 7
print(ans)
Buggy python submission (verdict: Runtime Error):
import math
N,K = list(map(int,input().split(" ")))


ans = 0

for p in range(1,N+1): # p 目
    if p >= K:
        ans += 1
    else:
        temp = K/p
        n = math.ceil(math.log2(temp))
        ans += (1/2)**n

ans /= N
print(ans)


Fixed submission:
import math
N,K = list(map(int,input().split(" ")))


ans = 0

for p in range(1,N+1): # p 目
    if p >= K:
        ans += 1
    else:
        temp = K/p
        n = math.ceil(math.log2(temp))
        ans += (1/2)**n

ans /= N
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
r,g,b,n = list(map(int,input().split(" ")))
c = 0
rl = n//r + 1
bl = n//b + 1


for i in range(rl):
    for j in range(bl):
        if n-(i*r + b*j) >=0 and (n-(i*r + b*j)) % g == 0:
            c += 1
print(c)

Fixed submission:
r,g,b,n = list(map(int,input().split(" ")))
c = 0
rl = n//r + 1
bl = n//b + 1


for i in range(rl):
    for j in range(bl):
        if n-(i*r + b*j) >=0 and (n-(i*r + b*j)) % g == 0:
            c += 1
print(c)
Buggy python submission (verdict: Runtime Error):
N,M = list(map(int,input().split(" ")))
As = list(map(int,input().split(" ")))

# N → 10^4 数字0-9 → 10^5

match= [-1,2,5,5,4,5,6,3,7,6]

dp = [-1 for _ in range(N + 1)] #N 本使ったときの最大値
dp[0] = 0
for num in As:
    dp[match[num] ]  = 1

for i in range(N + 1):
    for num in As:
        match_num = match[num]
        if i - match_num >= 0:
            #数字numを使うときのマッチの本数
            dp[i] = max( dp[i - match_num] + 1 , dp[i])
# print(dp)

ans = []
cot = N
As.sort(reverse=True)
while True:
    if cot == 0:
        break
    for num in As:
        if dp[cot - match[num]]  == dp[cot] - 1:
            ans.append(str(num))
            cot -= match[num]
            break
print("".join(ans))

Fixed submission:
N,M = list(map(int,input().split(" ")))
As = list(map(int,input().split(" ")))

# N → 10^4 数字0-9 → 10^5

match= [-1,2,5,5,4,5,6,3,7,6]

dp = [-1 for _ in range(N + 100)] #N 本使ったときの最大値
dp[0] = 0
for num in As:
    dp[match[num] ]  = 1

for i in range(N + 1):
    for num in As:
        match_num = match[num]
        if i - match_num >= 0:
            #数字numを使うときのマッチの本数
            dp[i] = max( dp[i - match_num] + 1 , dp[i])
# print(dp)

ans = []
cot = N
As.sort(reverse=True)
while True:
    if cot == 0:
        break
    for num in As:
        if dp[cot - match[num]]  == dp[cot] - 1:
            ans.append(str(num))
            cot -= match[num]
            break
print("".join(ans))
Buggy python submission (verdict: Runtime Error):
import math
import sys
import collections


N,M = list(map(int,input().split(" ")))

dp =[-1] * (N + 1)

def rec(v):
    if dp[v] != -1:
        return dp[v]


    res = 0
    for nv in di[v]:
        res = max(rec(nv) + 1 ,res)  # × dp[nv] ○ rec(nv) ∵ dp[nv]が未計算の場合があるから
    dp[v] = res
    return res

qs = [ list(map(int,input().split(" "))) for _ in range(M)]

# print(qs)
di = collections.defaultdict(lambda :[])
for q in qs:
    x,y = q
    di[x].append(y)
    #dp[y] → yを終点としたlongest path

for i in range(N + 1):
    rec(i)
print(max(dp))

Fixed submission:
import math
import sys
import collections
import sys

sys.setrecursionlimit(200000)




N,M = list(map(int,input().split(" ")))

dp =[-1] * (N + 1)

def rec(v):
    if dp[v] != -1:
        return dp[v]


    res = 0
    for nv in di[v]:
        res = max(rec(nv) + 1 ,res)  # × dp[nv] ○ rec(nv) ∵ dp[nv]が未計算の場合があるから
    dp[v] = res
    return res

qs = [ list(map(int,input().split(" "))) for _ in range(M)]

# print(qs)
di = collections.defaultdict(lambda :[])
for q in qs:
    x,y = q
    di[x].append(y)
    #dp[y] → yを終点としたlongest path

for i in range(N + 1):
    rec(i)
print(max(dp))
Buggy python submission (verdict: Runtime Error):
import math
N,M = list(map(int,input().split(" ")))
MOD = 10 ** 9 + 7
def factorize(n):
    fct = []  # prime factor
    b, e = 2, 0  # base, exponent
    while b * b <= n:
        while n % b == 0:
            n = n // b
            e = e + 1
        if e > 0:
            fct.append((b, e))
        b, e = b + 1, 0
    if n > 1:
        fct.append((n, 1))
    return fct


def cmb(n, r):
    if n - r < r: r = n - r
    if r == 0: return 1
    if r == 1: return n;

    numerator = [n - r + k + 1 for k in range(r)]
    denominator = [k + 1 for k in range(r)]

    for p in range(2, r + 1):
        pivot = denominator[p - 1]
        if pivot > 1:
            offset = (n - r) % p
            for k in range(p - 1, r, p):
                numerator[k - offset] /= pivot
                denominator[k] /= pivot

    result = 1
    for k in range(r):
        if numerator[k] > 1:
            result *= int(numerator[k]) % X

    return result % X

ans = 1
fac = factorize(M)
for temp in fac:
    num = temp[1]
    ans *= cmb(num + N - 1,num)
    ans %= MOD
print(ans)


Fixed submission:
import math
N,M = list(map(int,input().split(" ")))
MOD = 10 ** 9 + 7
def factorize(n):
    fct = []  # prime factor
    b, e = 2, 0  # base, exponent
    while b * b <= n:
        while n % b == 0:
            n = n // b
            e = e + 1
        if e > 0:
            fct.append((b, e))
        b, e = b + 1, 0
    if n > 1:
        fct.append((n, 1))
    return fct

def combinations_count(n, r):
    return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))

ans = 1
fac = factorize(M)
for temp in fac:
    num = temp[1]
    ans *= combinations_count(num + N - 1,N-1)
    ans %= MOD
print(ans)
Buggy python submission (verdict: Runtime Error):
n = int(input())
words = []
before= input()
words.append(first)
flag = True
for _ in range(n-1):
  s = input()
  if before[-1] != s[0]:
    flag == False
  before = s
l = len(set(words))
if l != n:
  flag = False
if flag:
  print("Yes")
else:
  print("No")

Fixed submission:
n = int(input())
words = []
before= input()
words.append(before)
flag = True
for _ in range(n-1):
  
  s = input()
  if before[-1] != s[0]:
    flag = False
  before = s
  words.append(s)

l = len(set(words))
if l != n:
  flag = False
if flag:
  print("Yes")
else:
  print("No")
Buggy python submission (verdict: Time Limit Exceeded):


S = input()
N = int(input())
l = len(S)

sub = {}
for i in range(1,l+1):
    for j in range(0,l+1-i):
        temp = S[j:j+i]
        if temp not in sub:
            sub [temp]  = True

sub = list(sub.keys())
sub.sort()
print(sub[N-1])





Fixed submission:


S = input()
N = int(input())
l = len(S)

sub = {}
for i in range(1,6):
    for j in range(0,l+1-i):
        temp = S[j:j+i]
        if temp not in sub:
            sub [temp]  = True

sub = list(sub.keys())
sub.sort()
print(sub[N-1])

Buggy python submission (verdict: Time Limit Exceeded):


S = input()
N = int(input())
l = len(S)

sub = []
for i in range(1,l+1):
    for j in range(0,l+1-i):
        sub.append(S[j:j+i])
sub = list(set(sub))
sub.sort()
print(sub[N-1])





Fixed submission:


S = input()
N = int(input())
l = len(S)

sub = {}
for i in range(1,6):
    for j in range(0,l+1-i):
        temp = S[j:j+i]
        if temp not in sub:
            sub [temp]  = True

sub = list(sub.keys())
sub.sort()
print(sub[N-1])
Buggy python submission (verdict: Runtime Error):


def main():
    temp=input()
    t1=""
    t2=""
    # if temp=="zyxwvutsrqponmlkjihgfedcba":
    #     print(-1)
    #     exit()
    
    # elif "z" in temp and len(temp)==26:
    #     t1,t2=temp.split("z")
    #     temp=t1[:-1]
    #     temp+=sorted(list(t2))[0]
    #     print(temp)
    #     exit()       
    # else:
    alps=[chr(ord('a') + i) for i in range(26)]
    for w in list(temp):
        alps.remove(w)
    temp=temp+alps[0]
    print(temp)
    exit()       

    

if __name__ == '__main__':
    main()


Fixed submission:


def main():
    temp=input()
    t1=""
    t2=""
    if temp=="zyxwvutsrqponmlkjihgfedcba":
        print(-1)
        exit()
    elif len(temp)==26:
        temp=list(temp)
        p=0
        for i in range(25):
            if temp[25-i]>temp[25-i-1]:
                p=25-i-1
                # print(p)
                # print(temp[p:])
                q=[k for k in temp[p:] if k>temp[p]] 
                print("".join(temp[:p])+min(q))
                exit()       
    else:
        alps=[chr(ord('a') + i) for i in range(26)]
        for w in list(temp):
            alps.remove(w)
        temp=temp+alps[0]
        print(temp)
        exit()       

    

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):


def main():
    temp=input()
    t1=""
    t2=""
    if temp=="zyxwvutsrqponmlkjihgfedcba":
        print(-1)
        exit()
    
    elif "z" in temp and len(temp)==26:
        t1,t2=temp.split("z")
        temp=t1[:-1]
        temp+=sorted(list(t2))[0]
        print(temp)
        exit()       
    else:
        alps=[chr(ord('a') + i) for i in range(26)]
        for w in list(temp):
            alps.remove(w)
        temp=temp+alps[0]
        print(temp)
        exit()       

    

if __name__ == '__main__':
    main()


Fixed submission:


def main():
    temp=input()
    t1=""
    t2=""
    if temp=="zyxwvutsrqponmlkjihgfedcba":
        print(-1)
        exit()
    elif len(temp)==26:
        temp=list(temp)
        p=0
        for i in range(25):
            if temp[25-i]>temp[25-i-1]:
                p=25-i-1
                # print(p)
                # print(temp[p:])
                q=[k for k in temp[p:] if k>temp[p]] 
                print("".join(temp[:p])+min(q))
                exit()       
    else:
        alps=[chr(ord('a') + i) for i in range(26)]
        for w in list(temp):
            alps.remove(w)
        temp=temp+alps[0]
        print(temp)
        exit()       

    

if __name__ == '__main__':
    main()
Buggy python submission (verdict: Runtime Error):
a=input()
a[3]='8'
print(a)

Fixed submission:
a=input()

print(a[0:3]+"8"+a[4:])
Buggy python submission (verdict: Runtime Error):
temp=input()
b=int(temp)
print(48-temp)


Fixed submission:
temp=input()
b=int(temp)
print(48-b)
Buggy python submission (verdict: Time Limit Exceeded):
def do():

    N=int(input())
    inp=[]
    for j in range(N-1):
        inp.append(input())

    for i in range(N):
        ti=0
        for j in range(i,N-1):
            temp=list(map(int,inp[j].split(" ")))
            ti+=getTime(ti,temp[1],temp[2])
            ti+=temp[0]

        print(ti)

def getTime(a,s,i):
    ti=0
    while(True):
        if a<=s+i*ti:
            break
        ti+=1

    return (s+i*ti)-a



if __name__=='__main__':
    do()


Fixed submission:
import math
N =int(input() )
trains = [list(map(int,input().split(" "))) for _ in range(N-1)]
for s in range(N):
    ans = 0
    spent = 0
    arrived_time = 0
    for train in trains[s:]:
        c,s,f = train
        n = max(0,math.ceil((ans-s) /f))
        wait = n * f + s - ans
        #待機時間

        ans += c + wait

    print(ans)
Buggy python submission (verdict: Runtime Error):
S = input()
q = 0
for i in list(S):
  q += i
if int(S)% q == 0:
  print("Yes")
else:
  print("No")

Fixed submission:
S = input()
q = 0
for i in list(S):
  q += int(i)
if int(S)% q == 0:
  print("Yes")
else:
  print("No")
Buggy python submission (verdict: Runtime Error):
temp_in=input()
temp_in=temp_in.split(" ")
temp_in=list(map(int,temp_in))
a,b=temp_in
times=[0]*(10**5+1)
times_sum=[0]*(10**5+1)
for i in range(a):
    temp_in=input()
    temp_in=temp_in.split(" ")
    temp_in=list(map(int,temp_in))
    times[temp_in[0]]+=1
    times[temp_in[1]+1]-=1
for i in range(len(times_sum)-1):
    times_sum[i]+=times_sum[i-1]+times[i]
print(max(times_sum))



Fixed submission:
import numpy as np

LIM = int(10e5)
time = [0] * (LIM + 1)
N, C = list(map(int, input().split(" ")))
schs = []
for _ in range(N):
    s, t, c = list(map(int, input().split(" ")))
    schs.append((s,t,c))
schs.sort(key = lambda x:x[0])

schs.sort(key = lambda x:x[2])

# print(schs)
for i,temp in enumerate(schs):
    s,t,c = temp

    s_p,t_p,c_p = schs[i-1]
    if i != 0 and c_p == c and t_p == s:
        time[t_p + 1] += 1
        time[t + 1] -= 1

    else:
        time[s] += 1
        time[t + 1] -= 1
# print(time[:100])
ruiseki = np.cumsum(time)

# print(ruiseki[:10])x
print(np.max(ruiseki[1:]))
Buggy python submission (verdict: Time Limit Exceeded):
import math
from collections import defaultdict,deque

INF=10**12+1
a=input()
a=int(a)
graph = defaultdict(list)
for i in range(a):
    graph[i].append((1,(i+1)%a))
    graph[i].append((0,(i*10)%a))
costs=[INF]*a
costs[1]=1
que = [] #後ろの方が優先度高いqueue
que.append((0,1))
while len(que)!=0:
    temp=que.pop()
    now=temp[1]
    v_now=graph[now]
    for c,n in v_now: #v nowから出てる総てのノードについて操作する c→ノードのコスト n→行き先
        if costs[n]>c+costs[now]: #改善したのでそのvは走査の余地あり
            costs[n]=c+costs[now]
            que.append((c,n))
    que=sorted(que,reverse=True)
print(costs[0])
        

Fixed submission:
import math
from collections import defaultdict,deque
import numpy as np
import heapq
INF=10**12+1
a=input()
a=int(a)
graph = defaultdict(list)
for i in range(a):
    graph[i].append((1,(i+1)%a))
    graph[i].append((0,(i*10)%a))
costs=[INF]*a
costs[1]=1
que = [] #後ろの方が優先度高いqueue
que.append((0,1))
while len(que)!=0:
    temp=heapq.heappop(que)
    now=temp[1]
    v_now=graph[now]
    for c,n in v_now: #v nowから出てる総てのノードについて操作する c→ノードのコスト n→行き先
        if costs[n]>c+costs[now]: #改善したのでそのvは走査の余地あり
            costs[n]=c+costs[now]
            heapq.heappush(que,(c,n))
            
print(costs[0])
Buggy python submission (verdict: Runtime Error):
S = input()
S = list(S)
S_no_x = []
def is_kaibun(kaibun):
    for i in range(len(kaibun)//2):
        if kaibun[i] != kaibun[-i-1]:
            return False
    return True
inds = []
for i,c in enumerate(S):
    if c != "x":
        S_no_x.append(c)
        inds.append(i)
if not is_kaibun(S_no_x):
    print(-1)
else:
    l = len(S_no_x)



    mae = ""
    usiro = ""
    if l % 2 == 0:
        mae_ind = inds[l // 2 - 1]
        usiro_ind = inds[l // 2]
        mae = S[:mae_ind +1]
        usiro = S[usiro_ind :]
    else:
        center = inds[l // 2]
        mae = S[:center]
        usiro = S[center +1:]

    usiro.reverse()
    usiro_x = []
    mae_x = []
    cot = 0
    usiro.append("@")
    for c in usiro:
        if c == "x":
            cot += 1
        else:
            usiro_x.append(cot)
            cot = 0
    cot = 0
    mae.append("@")
    for c in mae:
        if c == "x":
            cot += 1
        else:
            mae_x.append(cot)
            cot = 0
    ans = 0
    for a,b in zip(mae_x,usiro_x):
        ans += abs(a-b)
    print(ans)





Fixed submission:
S = input()
S = list(S)
S_no_x = []
def is_kaibun(kaibun):
    for i in range(len(kaibun)//2):
        if kaibun[i] != kaibun[-i-1]:
            return False
    return True
inds = []
for i,c in enumerate(S):
    if c != "x":
        S_no_x.append(c)
        inds.append(i)
if not is_kaibun(S_no_x):
    print(-1)
else:
    l = len(S_no_x)

    if l == 0:
        print(0)
    else:
        mae = ""
        usiro = ""
        if l % 2 == 0:
            mae_ind = inds[l // 2 - 1]
            usiro_ind = inds[l // 2]
            mae = S[:mae_ind +1]
            usiro = S[usiro_ind :]
        else:
            center = inds[l // 2]
            mae = S[:center]
            usiro = S[center +1:]

        usiro.reverse()
        usiro_x = []
        mae_x = []
        cot = 0
        usiro.append("@")
        for c in usiro:
            if c == "x":
                cot += 1
            else:
                usiro_x.append(cot)
                cot = 0
        cot = 0
        mae.append("@")
        for c in mae:
            if c == "x":
                cot += 1
            else:
                mae_x.append(cot)
                cot = 0
        ans = 0
        for a,b in zip(mae_x,usiro_x):
            ans += abs(a-b)
        print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import itertools
import math


LIM = 50
N,K = list(map(int,input().split(" ")))

Xs = []
Ys = []

dots = []
for _ in range(N):
    x,y = (map(int,input().split(" ")))
    Xs.append(x)
    Ys.append(y)
    dots.append((x,y))

Xs.sort()
Ys.sort()

ans = -1
for x1 in range(N):
    for x2 in range(x1 + 1,N):
        for y1 in range(N):
            for y2 in range(y1 + 1,N):
                cot = 0
                underX = Xs[x1]
                upperX = Xs[x2]
                underY = Ys[y1]
                upperY = Ys[y2]

                for k in range(N):
                    if   underX<= dots[k][0] <= upperX and underY <= dots[k][1] <= upperY:
                        cot += 1
                if cot >= K:
                    S = (upperX - underX) * (upperY - underY)
                    if ans == -1:
                        ans = S
                    ans = min( ans ,S)
print(ans)

Fixed submission:
import itertools
import math


LIM = 50
N,K = list(map(int,input().split(" ")))

Xs = []
Ys = []

dots = []
for _ in range(N):
    x,y = (map(int,input().split(" ")))
    Xs.append(x)
    Ys.append(y)
    dots.append((x,y))

Xs.sort()
Ys.sort()

ans = -1
for x1 in range(N):
    for x2 in range(x1 + 1,N):
        for y1 in range(N):
            for y2 in range(y1 + 1,N):
                cot = 0
                underX = Xs[x1]
                upperX = Xs[x2]
                underY = Ys[y1]
                upperY = Ys[y2]

                for k in range(N):
                    if   underX<= dots[k][0] <= upperX and underY <= dots[k][1] <= upperY:
                        cot += 1
                if cot >= K:
                    S = (upperX - underX) * (upperY - underY)
                    if ans == -1:
                        ans = S
                    ans = min( ans ,S)
print(ans)
Buggy python submission (verdict: Runtime Error):
N=int(input())
p=list(map(int,input().split(" ")))
i=0
c=0
while i<N:
    if p[i]==i+1:
        if i<N and p[i+1]==i+2:
            c+=1
            i+=1
        else:
            c+=1
    i+=1

print(c)

Fixed submission:
N=int(input())
p=list(map(int,input().split(" ")))
i=0
c=0
while i<N:
    if p[i]==i+1:
        if i<N-1 and p[i+1]==i+2:
            c+=1
            i+=1
        else:
            c+=1
    i+=1

print(c)