Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
def main(N):
	a = list(map(int, input().split()))
	if a.count(0) == N:
		print("Yes")
		return
	if N%3 != 0:
		print("No")
		return
	d={}
	for i in a:
		if i in d:
			d[i] = d[i] + 1
		else:
			d[i] = 1
	if 0 in d.keys():
		if d[0] == N//3:
			for i in d.keys():
				if i == 0:
					continue
				elif d[i] % 2 != 0:
					print("No")
					return
			print("Yes")
		else:
			print("No")
	else:
		for i in d.values():
			if i != N//3:
				print("No")
				return
		lst = d.keys()
		if (lst[0]^lst[2]!=lst[1]) or (lst[0] != lst[1]^lst[2]) or(lst[2]!=lst[1]^lst[0]):
			print("No")
			return
		print("Yes")
	return
		
	return

main(int(input()))

Fixed submission:
def main(N):
	a = list(map(int, input().split()))
	if a.count(0) == N:
		print("Yes")
		return
	if N%3 != 0:
		print("No")
		return
	d={}
	for i in a:
		if i in d:
			d[i] = d[i] + 1
		else:
			d[i] = 1
	if 0 in d.keys():
		if d[0] == N//3:
			for i in d.keys():
				if i == 0:
					continue
				elif d[i] % 2 != 0:
					print("No")
					return
			print("Yes")
		else:
			print("No")
	else:
		for i in d.values():
			if i != N//3:
				print("No")
				return
		lst = list(d.keys())
		if (lst[0]^lst[2]!=lst[1]) or (lst[0] != lst[1]^lst[2]) or(lst[2]!=lst[1]^lst[0]):
			print("No")
			return
		print("Yes")
	return
		
	return

main(int(input()))
Buggy python submission (verdict: Time Limit Exceeded):
def main():
	n, m = map(int, input().split())
	a = list(map(int, input().split()))
	for _ in range(m):
		b, c = map(int, input().split())
		a += [c]*b
	a.sort()
	print(sum(a[::-1][:n]))
	return
main()

Fixed submission:
def main():
	n, m = map(int, input().split())
	a = list(map(int, input().split()))
	dic = {}
	lst = []
	for i in a:
		if i in dic:
			dic[i] = dic[i] + 1
		else:
			lst += [i]
			dic[i] = 1
	for _ in range(m):
		b, c = map(int, input().split())
		if c in dic:
			dic[c] = dic[c] + b
		else:
			dic[c] = b
			lst += [c]
	lst.sort()
	lst = lst[::-1]
	i = 0
	ans = 0
	while n>0:
		ans += lst[i]*min(dic[lst[i]], n)
		n -= dic[lst[i]]
		i += 1
	print(ans)
	return
main()
Buggy python submission (verdict: Time Limit Exceeded):
import sys
sys.setrecursionlimit(10**6)

d={}

def c(s):
	a = [0] * 10
	for i in s:
		a[int(i)] += 1
	if a[3] != 0 and a[5] != 0 and a[7] != 0:
		return True
	else:
		return False

def r(m, s):
	global d
	if s == "":
		pass
	elif m < int(s) or (s in d):
		return 0
	ret = 0
	if c(s):
		ret += 1
		d[s] = 1
	ret += r(m,s+"3")
	ret += r(m,s+"5")
	ret += r(m,s+"7")
	ret += r(m,"3"+s)
	ret += r(m,"5"+s)
	ret += r(m,"7"+s)
	return ret

def main():
	n = int(input())
	print(r(n,""))
	return
main()

Fixed submission:
import sys
sys.setrecursionlimit(10**6)

d={}

def c(s):
	a = [0] * 10
	for i in s:
		a[int(i)] += 1
	if a[3] != 0 and a[5] != 0 and a[7] != 0:
		return True
	else:
		return False

def r(m, s):
	global d
	if s == "":
		pass
	elif m < int(s) or (s in d):
		return 0
	ret = 0
	if c(s):
		ret += 1
	d[s] = 1
	ret += r(m,s+"3")
	ret += r(m,s+"5")
	ret += r(m,s+"7")
	ret += r(m,"3"+s)
	ret += r(m,"5"+s)
	ret += r(m,"7"+s)
	return ret

def main():
	n = int(input())
	print(r(n,""))
	return
main()
Buggy python submission (verdict: Runtime Error):
a = [int(i) for i in input().split())]
a.sort()
print(a[2]*10+a[1]+a[0])

Fixed submission:
a = [int(i) for i in input().split()]
a.sort()
print(a[2]*10+a[1]+a[0])
Buggy python submission (verdict: Runtime Error):
def main():
	n = list(map(int, input().split()))
	ans = 0
	for i in range(n[0], n[1]+1):
		temp = str(i)
		if temp == temp[::-1]:
			an += 1
	print(ans)
main()

Fixed submission:
def main():
	n = list(map(int, input().split()))
	ans = 0
	for i in range(n[0], n[1]+1):
		temp = str(i)
		if temp == temp[::-1]:
			ans += 1
	print(ans)
main()
Buggy python submission (verdict: Time Limit Exceeded):
a, b = input().split()
a = int(a)
b = int(b)
ans = -1
for i in range(1000000000000000000):
    if (a * i) % b != 0:
        ans = a * i
        break
print(ans)

Fixed submission:
a, b = input().split()
a = int(a)
b = int(b)
ans = -1
for i in range(1000000000000000000):
    if a % b == 0:
        break
    if a*i > 1000000000000000000:
        break
    if (a * i) % b != 0:
        ans = a * i
        break
print(ans)
Buggy python submission (verdict: Runtime Error):
l = [0]*11
r = list(map(int,input().split()))
for i in r:
  l[r] += 1
print("YES" if (l[5]==2)and(l[7]==1) else "NO")

Fixed submission:
l = [0]*11
r = list(map(int,input().split()))
for i in r:
  l[i] += 1
print("YES" if (l[5]==2)and(l[7]==1) else "NO")
Buggy python submission (verdict: Runtime Error):
A = [list(map(int, input().split())) for i in range(3)]
N = int(input())
B = [int(input()) for i in range(N)]

cards = A[0] + A[1] + A[2]

for b in B:
    cards = [c if c != b else 0 for c in cards]

if (sum(A[0:3]) == 0):
    print('Yes')
elif (sum(A[3:6]) == 0):
    print('Yes')
elif (sum(A[7:9]) == 0):
    print('Yes')
elif ((A[0] + A[3] + A[6]) == 0):
    print('Yes')
elif ((A[1] + A[4] + A[7]) == 0):
    print('Yes')
elif ((A[2] + A[5] + A[8]) == 0):
    print('Yes')
elif ((A[0] + A[4] + A[8]) == 0):
    print('Yes')
elif ((A[2] + A[4] + A[6]) == 0):
    print('Yes')
else:
    print('No')


Fixed submission:
A = [list(map(int, input().split())) for i in range(3)]
N = int(input())
B = [int(input()) for i in range(N)]

cards = A[0] + A[1] + A[2]

for b in B:
    cards = [c if c != b else 0 for c in cards]

if (sum(cards[0:3]) == 0):
    print('Yes')
elif (sum(cards[3:6]) == 0):
    print('Yes')
elif (sum(cards[6:9]) == 0):
    print('Yes')
elif ((cards[0] + cards[3] + cards[6]) == 0):
    print('Yes')
elif ((cards[1] + cards[4] + cards[7]) == 0):
    print('Yes')
elif ((cards[2] + cards[5] + cards[8]) == 0):
    print('Yes')
elif ((cards[0] + cards[4] + cards[8]) == 0):
    print('Yes')
elif ((cards[2] + cards[4] + cards[6]) == 0):
    print('Yes')
else:
    print('No')
Buggy python submission (verdict: Runtime Error):
N = int(input())

alp = 'abcdefghijklmnopqrstuvwxyz'
ans = alp[(alp.index(N) + 1)]
print(ans)


Fixed submission:
S = input()

alp = 'abcdefghijklmnopqrstuvwxyz'
ans = alp[(alp.index(S) + 1)]
print(ans)

Buggy python submission (verdict: Runtime Error):
N = int(input())

alp = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
ans = alp[(alp.index(N) + 1)]
print(ans)


Fixed submission:
S = input()

alp = 'abcdefghijklmnopqrstuvwxyz'
ans = alp[(alp.index(S) + 1)]
print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
S = input()

ans = 0
while 'ABC' in S:
    ans += 1
    S.remove('ABC')

print(ans)


Fixed submission:
N = int(input())
S = input()

ans = S.count('ABC')
print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
D = list(map(int, input().split()))

ans = 0
for i in range(0, N):
    for j in range(i, N+1):
        ans += (D[i] * D[j])
print(ans)


Fixed submission:
N = int(input())
D = list(map(int, input().split()))

ans = 0
for i in range(0, N):
    for j in range(i+1, N):
        ans += (D[i] * D[j])
print(ans)
Buggy python submission (verdict: Runtime Error):
import numpy as np


N, D = list(map(int, input().split()))
X = [list(map(int, input().split())) for i in range(N)]

ans = 0
for i in range(N):
    for j in range(i + 1, N):
        dis = np.linalg.norm(np.array(X[i]) - np.array(X[j]))
        if dis - int(dis) < 0.00000001:
            ans += 1
print(ans)


Fixed submission:
import numpy as np


N, D = list(map(int, input().split()))
X = [list(map(int, input().split())) for i in range(N)]

ans = 0
for i in range(N):
    for j in range(i + 1, N):
        dis = np.linalg.norm(np.array(X[i]) - np.array(X[j]))
        if dis - int(dis) < 0.00000001:
            ans += 1
print(ans)
Buggy python submission (verdict: Runtime Error):
A = [int(input()) for i in range(3)]

ans = sum(A) - max(A)
print(ans)


Fixed submission:
A = list(map(int, input().split()))
ans = sum(A) - max(A)
print(ans)
Buggy python submission (verdict: Runtime Error):
def dfs(node, distance):
    for next_node, edge_size in G[node]:
        if ans[next_node] == -1:
            ans[next_node] = ((distance+edge_size) % 2)
            dfs(next_node, distance+edge_size)


N = int(input())

G = [[] for i in range(N)]
for i in range(N-1):
    u, v, w = map(int, input().split())
    G[u-1].append([v-1, w])
    G[v-1].append([u-1, w])

ans = [-1]*N
dfs(0, 0)
print(*ans, sep='\n')


Fixed submission:
import math


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

ans = 0

for n in range(1, N+1):
    # 2^(num_success) * n >= K なる num_success
    # 2^(num_success) >= K/n
    # num_success >= log_2(K/n)
    num_success = max(0, math.ceil(math.log2(K/n)))
    ans += (1/2) ** num_success

print(ans/N)

Buggy python submission (verdict: Runtime Error):
import math


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

ans = 0

for n in range(1, N+1):
    # 2^(num_success) * n >= K なる num_success
    # 2^(num_success) >= K/n
    # num_success >= log_2(K/n)
    num_success = max(0, math.ceil(math.log2(K/n)))
    ans += (1/2) ** num_success

print(ans/N)


Fixed submission:
import math


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

ans = 0

for n in range(1, N+1):
    # 2^(num_success) * n >= K なる num_success
    # 2^(num_success) >= K/n
    # num_success >= log_2(K/n)
    num_success = max(0, math.ceil(math.log2(K/n)))
    ans += (1/2) ** num_success

print(ans/N)
Buggy python submission (verdict: Time Limit Exceeded):
import fractions
from functools import reduce
import itertools


N = int(input())
A = list(map(int, input().split()))

ans = []

for a in list(itertools.combinations(A, N-1)):
    ans.append(reduce(fractions.gcd, a))
print(max(ans))


Fixed submission:
import fractions


N = int(input())
A = list(map(int, input().split()))

gcd_l = [0]
gcd_r = [0]
for i in range(N):
    gcd_l.append(fractions.gcd(gcd_l[i], A[i]))
    gcd_r.append(fractions.gcd(gcd_r[i], A[-(i+1)]))
gcd_r = gcd_r[::-1]

ans = []
for i in range(N):
    ans.append(fractions.gcd(gcd_l[i], gcd_r[i+1]))

print(max(ans))

Buggy python submission (verdict: Time Limit Exceeded):
import fractions
from functools import reduce


N = int(input())
A = list(map(int, input().split()))

ans = []
for i in range(N):
    if i != N:
        a = A[:i] + A[i+1:]
    else:
        a = A[:i]
    ans.append(reduce(fractions.gcd, a))
print(max(ans))


Fixed submission:
import fractions


N = int(input())
A = list(map(int, input().split()))

gcd_l = [0]
gcd_r = [0]
for i in range(N):
    gcd_l.append(fractions.gcd(gcd_l[i], A[i]))
    gcd_r.append(fractions.gcd(gcd_r[i], A[-(i+1)]))
gcd_r = gcd_r[::-1]

ans = []
for i in range(N):
    ans.append(fractions.gcd(gcd_l[i], gcd_r[i+1]))

print(max(ans))

Buggy python submission (verdict: Time Limit Exceeded):
import fractions
from functools import reduce


N = int(input())
A = list(map(int, input().split()))

ans = []
for i in range(N):
    if i != N:
        a = A[:i] + A[i+1:]
    else:
        a = A[:i]
    ans.append(reduce(fractions.gcd, a))
print(max(ans))


Fixed submission:
import fractions


N = int(input())
A = list(map(int, input().split()))

gcd_l = [0]
gcd_r = [0]
for i in range(N):
    gcd_l.append(fractions.gcd(gcd_l[i], A[i]))
    gcd_r.append(fractions.gcd(gcd_r[i], A[-(i+1)]))
gcd_r = gcd_r[::-1]

ans = []
for i in range(N):
    ans.append(fractions.gcd(gcd_l[i], gcd_r[i+1]))

print(max(ans))
Buggy python submission (verdict: Runtime Error):
from itertools import accumulate


N = int(input())
S = input()

black = [0]*N
white = [0]*N

for i, s in enumerate(S):
    if s == '#':
        black[i] = 1
    else:
        white[i] = 1

# 累積和
black = [0] + black
black = list(accumulate(black))
white = [0] + white[::-1]
white = list(accumulate(white))[::-1]

ans = []
for i in range(N+1):
    ans.append(black[i] + white[i])

print(min(ans))

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

if (A[0] < A[2] < A[1]) or (A[1] < A[2] < A[0]):
    print("Yes")
else:
    print("No")
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
S = input()

cnt = 0
for i in range(N-1):
    if S[i] == '#' and S[i+1] == '.':
        tmp_S = list(S)
        tmp_S[i+1] = '#'
        S = "".join(tmp_S)
        cnt += 1

print(cnt)


Fixed submission:
from itertools import accumulate


N = int(input())
S = input()

black = [0 for _ in range(N)]
white = [0 for _ in range(N)]

for i, s in enumerate(S):
    if s == '#':
        black[i] = 1
    else:
        white[i] = 1

# 累積和
black = [0] + black
black = list(accumulate(black))
white = [0] + white[::-1]
white = list(accumulate(white))[::-1]

ans = []
for i in range(N+1):
    ans.append(black[i] + white[i])

print(min(ans))
Buggy python submission (verdict: Runtime Error):
N, K = list(map(int, input().split()))
S = input()

ans = -1    # 十分に小さい値
if (S[0] == '0'):
    stand = 1
else:
    stand = 0

L = 0
R = 0

# 尺取り法
while (R < N):
    # 右端を進めることが可能（進めたときの積がK以下）なら、右端を進める
    if (stand <= K):
        ans = max(ans, R - L + 1)
        if (S[R] == '1' and S[R + 1] == '0'):
            stand += 1
        R += 1
    # 進められない場合、左端と右端が同じなら両者を進める
    # 左端が右端を追い越さないための処理
    elif (L == R):
        L += 1
        R += 1
    # それ以外は左端のみを進める
    else:
        if (S[L] == '0' and S[L + 1] == '1'):
            stand -= 1
        L += 1


Fixed submission:
N, K = list(map(int, input().split()))
S = input()

S = S + 'E'   # 終端処理
ans = -1    # 答えの初期値（十分に小さい値）

# 立った人の連続の数
if (S[0] == '0'):
    stand = 1
else:
    stand = 0

L = 0
R = 0

# 尺取り法
while (R < N):
    # 右端を進めることが可能（立った人の連続の数がK以下）なら、右端を進める
    if (stand <= K):
        # 立った人の連続の集合数が増えるなら1足す
        if (S[R] == '1' and S[R + 1] == '0'):
            stand += 1
        ans = max(ans, R - L + 1)
        R += 1
    # 進められない場合、左端と右端が同じなら両者を進める
    # 左端が右端を追い越さないための処理
    elif (L == R):
        L += 1
        R += 1
    # それ以外は左端のみを進める
    else:
        # 立った人の連続の数が減るなら1減らす
        if (S[L] == '0' and S[L + 1] == '1'):
            stand -= 1
        L += 1

print(ans)

Buggy python submission (verdict: Runtime Error):
N, K = list(map(int, input().split()))
S = input()

ans = -1    # 十分に小さい値
if (S[0] == '0'):
    stand = 1
else:
    stand = 0

l = 0
r = 0

# 尺取り法
while (r < N):
    # 右端を進めることが可能（進めたときの積がK以下）なら、右端を進める
    if (stand <= K):
        ans = max(ans, r - l + 1)
        if (S[r] == '1' and S[r + 1] == '0'):
            stand += 1
        r += 1
    # 進められない場合、左端と右端が同じなら両者を進める
    # 左端が右端を追い越さないための処理
    elif (l == r):
        l += 1
        r += 1
    # それ以外は左端のみを進める
    else:
        if S[l] == '0' and if S[l + 1] == '1':
            stand -= 1
        l += 1


Fixed submission:
N, K = list(map(int, input().split()))
S = input()

S = S + 'E'   # 終端処理
ans = -1    # 答えの初期値（十分に小さい値）

# 立った人の連続の数
if (S[0] == '0'):
    stand = 1
else:
    stand = 0

L = 0
R = 0

# 尺取り法
while (R < N):
    # 右端を進めることが可能（立った人の連続の数がK以下）なら、右端を進める
    if (stand <= K):
        # 立った人の連続の集合数が増えるなら1足す
        if (S[R] == '1' and S[R + 1] == '0'):
            stand += 1
        ans = max(ans, R - L + 1)
        R += 1
    # 進められない場合、左端と右端が同じなら両者を進める
    # 左端が右端を追い越さないための処理
    elif (L == R):
        L += 1
        R += 1
    # それ以外は左端のみを進める
    else:
        # 立った人の連続の数が減るなら1減らす
        if (S[L] == '0' and S[L + 1] == '1'):
            stand -= 1
        L += 1

print(ans)
Buggy python submission (verdict: Runtime Error):
import itertools


X, Y, Z, K = list(map(int, input().split()))
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

AB = [a + b for (a, b) in list(itertools.product(A, B))]
AB = sorted(AB)[::-1]
ans = [ab + c for (ab, c) in list(itertools.product(AB[:3000], C))]
ans = sorted(ans)[::-1]
for i in range(K):
    print(ans[i])


Fixed submission:
A = [int(input()) for i in range(5)]
K = int(input())

if (max(A)-min(A) <= K):
    print("Yay!")
else:
    print(":(")
Buggy python submission (verdict: Time Limit Exceeded):
import itertools


X, Y, Z, K = list(map(int, input().split()))
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

AB = [a + b for (a, b) in list(itertools.product(A, B))]
AB = sorted(AB)[::-1]
ans = [ab + c for (ab, c) in list(itertools.product(AB[:3000], C))]
ans = sorted(ans)[::-1]
for i in range(K):
    print(ans[i])


Fixed submission:
import itertools


X, Y, Z, K = list(map(int, input().split()))
A = list(map(int, input().split()))
B = list(map(int, input().split()))
C = list(map(int, input().split()))

AB = [a + b for (a, b) in list(itertools.product(A, B))]
AB.sort(reverse=True)
ans = [ab + c for (ab, c) in list(itertools.product(AB[:min(3000, X*Y*Z)], C))]
ans.sort(reverse=True)
for i in range(K):
    print(ans[i])
Buggy python submission (verdict: Runtime Error):
S = input()
N = len(S)

alp = 'ACGT'

cnt = []

for i in range(0, N):
    for j in range(i, N+1):
        tmp = S[i:j]
        flg = 0
        for a in alp:
            if a in tmp:
                flg = 1
        if flg:
            cnt.append(len(tmp))

print(max(cnt))


Fixed submission:
S = input()
N = len(S)

alp = 'BDEFHIJKLMNOPQRSUVWXYZ'

ans = []
cnt = []

for i in range(0, N):
    for j in range(i, N+1):
        tmp = S[i:j]
        flg = 1
        for a in alp:
            if a in tmp:
                flg = 0
        if flg:
            cnt.append(len(tmp))

print(max(cnt))
Buggy python submission (verdict: Time Limit Exceeded):
N, Q = list(map(int, input().split()))
S = input()
A = [list(map(int, input().split())) for i in range(Q)]

flg = []
for i in range(N-2):
    tmp_S = S[i:i+2]
    if tmp_S == 'AC':
        flg.append(1)
    else:
        flg.append(0)

for a in A:
    tmp_f = flg[a[0]-1:a[1]-1]
    print(sum(tmp_f))


Fixed submission:
from itertools import accumulate


N, Q = list(map(int, input().split()))
S = input()
A = [list(map(int, input().split())) for i in range(Q)]

flg = []
for i in range(N-1):
    tmp_S = S[i:i+2]
    if tmp_S == 'AC':
        flg.append(1)
    else:
        flg.append(0)

# print(flg)
flg2 = [0] + flg
flg2 = list(accumulate(flg2))
# print(flg2)

for a in A:
    print(flg2[a[1]-1] - flg2[a[0]-1])

Buggy python submission (verdict: Time Limit Exceeded):
N, Q = list(map(int, input().split()))
S = input()
A = [list(map(int, input().split())) for i in range(Q)]

for a in A:
    tmp = S[a[0]-1:a[1]]
    print(tmp.count('AC'))


Fixed submission:
from itertools import accumulate


N, Q = list(map(int, input().split()))
S = input()
A = [list(map(int, input().split())) for i in range(Q)]

flg = []
for i in range(N-1):
    tmp_S = S[i:i+2]
    if tmp_S == 'AC':
        flg.append(1)
    else:
        flg.append(0)

# print(flg)
flg2 = [0] + flg
flg2 = list(accumulate(flg2))
# print(flg2)

for a in A:
    print(flg2[a[1]-1] - flg2[a[0]-1])
Buggy python submission (verdict: Runtime Error):
#include <bits/stdc++.h>
using namespace std;

long long N, ans, M, cnt[26];
char S;

int main() {
  M = 1e9 + 7;
  cin >> N;

  for (int i = 0; i < N; i++) {
    cin >> S;
    cnt[S - 'a']++;
  }

  ans = 1;
  for (int i = 0; i < 26; i++) {
    ans *= (cnt[i] + 1);
    ans %= M;
  }

  cout << ans - 1 << '\n';

  return 0;
}


Fixed submission:
N = int(input())
S = input()

M = 10**9 + 7
cnt = [0] * 26

for i in range(N):
    cnt[ord(S[i]) - ord('a')] += 1

ans = 1
for i in range(26):
    ans *= (cnt[i] + 1)
    ans %= M

print(ans - 1)

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


N = int(input())
S = input()

ptn = [i for i in range(N)]

cnt = 0
for i in range(1, N+1):
    c = list(itertools.combinations(ptn, i))
    for v in c:
        tmp = ''
        for _ in v:
            tmp += S[_]
        if (len(tmp) == len(set(tmp))):
            cnt += 1

print(cnt)


Fixed submission:
N = int(input())
S = input()

M = 10**9 + 7
cnt = [0] * 26

for i in range(N):
    cnt[ord(S[i]) - ord('a')] += 1

ans = 1
for i in range(26):
    ans *= (cnt[i] + 1)
    ans %= M

print(ans - 1)

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


N = int(input())
S = input()

ptn = [i for i in range(N)]

ans = []
for i in range(1, N+1):
    c = list(itertools.combinations(ptn, i))
    for v in c:
        tmp = ''
        for _ in v:
            tmp += S[_]
        ans.append(tmp)

cnt = 0

for _ in (ans):
    if (len(_) == len(set(_))):
        cnt += 1

amari = 10**9 + 7
print(cnt%amari)


Fixed submission:
N = int(input())
S = input()

M = 10**9 + 7
cnt = [0] * 26

for i in range(N):
    cnt[ord(S[i]) - ord('a')] += 1

ans = 1
for i in range(26):
    ans *= (cnt[i] + 1)
    ans %= M

print(ans - 1)
Buggy python submission (verdict: Time Limit Exceeded):
from functools import reduce
from operator import xor


A, B = list(map(int, input().split()))

def main():
    val = []
    for i in range(A, B+1):
        val.append(i)
    ans = reduce(xor, val)
    return ans

print(main())


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

def get(x):
    return [x, 1, x + 1, 0][x % 4]

def main():
    return get(B) ^ get(A - 1)

print(main())
Buggy python submission (verdict: Runtime Error):
class UnionFindTree():
    def __init__(self, N):
        self.parent = [-1]*(N+1)
        self.size = [1]*(N+1)
        self.hubensa = N*(N-1)//2
  
    def find(self, i):
        if self.parent[i] == -1:
            group = i
        else:
            group = self.find(self.parent[i]) 
            self.parent[i] = group
        return group
      
    def unite(self, x, y):
        px = self.find(x)
        py = self.find(y)
        if px != py:
            if self.rank[px] == self.rank[py]: # rank is same
                self.rank[px] += 1
            elif self.rank[px] < self.rank[py]:
                px, py = py, px
                
            self.parent[py] = px
            self.hubensa -= self.size[px] * self.size[py]
            self.size[px] += self.size[py]

N, M = list(map(int, input().split()))
A = [0 for _ in range(M)]
B = [0 for _ in range(M)]

for i in range(M):
    A[i], B[i] = list(map(int, input().split()))

ans = []
UFT = UnionFindTree(N)

# 後ろから処理
for i in range(M-1, -1, -1):
    ans.append(UFT.hubensa)
    UFT.unite(A[i], B[i])

print(*ans[::-1], sep="\n")


Fixed submission:
class UnionFindTree():
    def __init__(self, N):
        self.parent = [-1]*(N+1)
        self.rank = [1]*(N+1)
        self.size = [1]*(N+1)
        self.hubensa = N*(N-1)//2

    def find(self, i):
        if self.parent[i] == -1:
            group = i
        else:
            group = self.find(self.parent[i]) 
            self.parent[i] = group
        return group
      
    def unite(self, x, y):
        px = self.find(x)
        py = self.find(y)
        if px != py:
            if self.rank[px] == self.rank[py]: # rank is same
                self.rank[px] += 1
            elif self.rank[px] < self.rank[py]:
                px, py = py, px
                
            self.parent[py] = px
            self.hubensa -= self.size[px] * self.size[py]
            self.size[px] += self.size[py]

N, M = list(map(int, input().split()))
A = [0 for _ in range(M)]
B = [0 for _ in range(M)]

for i in range(M):
    A[i], B[i] = list(map(int, input().split()))

ans = []
UFT = UnionFindTree(N)

# 後ろから処理
for i in range(M-1, -1, -1):
    ans.append(UFT.hubensa)
    UFT.unite(A[i], B[i])

print(*ans[::-1], sep="\n")