Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
# import itertools
# import math
# import sys
# import numpy as np

N = int(input())
# S = input()
# n, *a = map(int, open(0))
# H, W, K = map(int, input().split())
# A = list(map(int, input().split()))
# B = list(map(int, input().split()))
# S = input()

# d = sorted(d, reverse=True, key=lambda x:x[0])
# all_cases = list(itertools.permutations(P))
# a = list(itertools.combinations_with_replacement(range(1, M + 1), N))
# itertools.product((0,1), repeat=n)

# A = np.array(A)
# cum_A = np.cumsum(A)
# cum_A = np.insert(cum_A, 0, 0)

edges = [list(map(int,input().split())) for _ in range(N-1)]
tree = [[] for _ in range(N + 1)]

for edge in edges:
    tree[edge[0]].append([edge[1], edge[2]])
    tree[edge[1]].append([edge[0], edge[2]])

# print(tree)

depth = [-1] * (N + 1)
depth[1] = 0

def dfs(tree, s):
    for l in tree[s]:
        if depth[l[0]] == -1:
            depth[l[0]] = depth[s] + l[1]
            dfs(tree, l[0])

dfs(tree, 1)

# print(depth)

for l in depth[1:]:
    if l % 2 == 0:
        print(1)
    else:
        print(0)


Fixed submission:
# import itertools
# import math
import sys
sys.setrecursionlimit(500*500)
# import numpy as np

N = int(input())
# S = input()
# n, *a = map(int, open(0))
# H, W, K = map(int, input().split())
# A = list(map(int, input().split()))
# B = list(map(int, input().split()))
# S = input()

# d = sorted(d, reverse=True, key=lambda x:x[0])
# all_cases = list(itertools.permutations(P))
# a = list(itertools.combinations_with_replacement(range(1, M + 1), N))
# itertools.product((0,1), repeat=n)

# A = np.array(A)
# cum_A = np.cumsum(A)
# cum_A = np.insert(cum_A, 0, 0)

edges = [list(map(int,input().split())) for _ in range(N-1)]
tree = [[] for _ in range(N + 1)]

for edge in edges:
    tree[edge[0]].append([edge[1], edge[2]])
    tree[edge[1]].append([edge[0], edge[2]])

# print(tree)

depth = [-1] * (N + 1)
depth[1] = 0

def dfs(tree, s):
    for l in tree[s]:
        if depth[l[0]] == -1:
            depth[l[0]] = depth[s] + l[1]
            dfs(tree, l[0])

dfs(tree, 1)

# print(depth)

for l in depth[1:]:
    if l % 2 == 0:
        print(1)
    else:
        print(0)
Buggy python submission (verdict: Runtime Error):
N = int(input())
cnt_AB = 0
end_A = 0
start_B = 0
start_B_and_end_A= 0
for i in range(N):
    s = input()
    cnt_AB += s.count('AB')
    if s[-1] == 'A' and s[0] == 'B':
        start_B_and_end_A += 1
    else:
        if s[-1] == 'A':
            end_A += 1
        if s[0] == 'B':
            start_B += 1
if end_A == 0 and start_B == 0:
    print(cnt_AB + start_B_and_end_A - 1)
else:
    print(cnt_AB + start_B_and_end_A + min(end_A, start_B))

Fixed submission:
N, K = map(int, input().split())
print(N-K+1)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
S = input()
Min = N
for i in range(N+1):
    cnt = S[:i].count("#") + S[i:].count(".")
    # print(S[:i].count("#") + S[i:].count("."))
    if Min > cnt:
        Min = cnt
print(Min)

Fixed submission:
N = int(input())
S = input()
Min = N
siro = S.count(".")
kuro = S.count("#")
Min = min([siro, kuro])
siro_now = 0
for i in range(N):
    if S[i] == ".":
        siro_now += 1
    cnt = (((i+1)-siro_now) + (siro - siro_now))
    if Min > cnt:
        Min = cnt
print(Min)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
S = input()
cnt_l = []
for i in range(N+1):
    cnt_l.append(S[:i].count("#") + S[i:].count("."))
    # print(S[:i].count("#") + S[i:].count("."))
print(min(cnt_l))

Fixed submission:
N = int(input())
S = input()
Min = N
siro = S.count(".")
kuro = S.count("#")
Min = min([siro, kuro])
siro_now = 0
for i in range(N):
    if S[i] == ".":
        siro_now += 1
    cnt = (((i+1)-siro_now) + (siro - siro_now))
    if Min > cnt:
        Min = cnt
print(Min)
Buggy python submission (verdict: Time Limit Exceeded):
N, Q = map(int, input().split())
S = input()
ans = []
import re
# for i in range(Q):
#     l, r = map(int, input().split())
#     ans.append(len(re.findall("AC", S[l-1:r])))
# for i in ans:
#     print(i)
# TLE
index = []
for i in range(N):
    if S[i:].find("AC") != -1:
        index.append(S[i:].find("AC") + i)
index = list(set(index))
import numpy as np
for i in range(Q):
    l, r = map(int, input().split())
    # l-1 ~ rまで
    ans.append(sum(l-1<=x and x<=r-2 for x in index))
for i in ans:
    print(i)


Fixed submission:
N, Q = map(int, input().split())
S = input()
C = [0] * len(S)
for i, c in enumerate(S):
    if i != 0 and c == 'C' and S[i-1] == 'A':
        C[i] += 1
    C[i] += C[i - 1]
ans = []
for i in range(Q):
    l, r = map(int, input().split())
    ans.append(C[r-1] - C[l-1])
for i in ans:
    print(i)

Buggy python submission (verdict: Time Limit Exceeded):
N, Q = map(int, input().split())
S = input()
ans = []
import re
for i in range(Q):
    l, r = map(int, input().split())
    ans.append(len(re.findall("AC", S[l-1:r])))
for i in ans:
    print(i)

Fixed submission:
N, Q = map(int, input().split())
S = input()
C = [0] * len(S)
for i, c in enumerate(S):
    if i != 0 and c == 'C' and S[i-1] == 'A':
        C[i] += 1
    C[i] += C[i - 1]
ans = []
for i in range(Q):
    l, r = map(int, input().split())
    ans.append(C[r-1] - C[l-1])
for i in ans:
    print(i)
Buggy python submission (verdict: Time Limit Exceeded):
S = input()
len_s = len(S)
import re
def f(S):
    if ((not "01" in S) and (not "10" in S)):
        return S
    S = re.sub('01|10',"",S)
    return f(S)
print(len_s - len(f(S)))

Fixed submission:
S = input()
if len(S) == 1:
    print(0)
else:
    print(min(S.count('0'), S.count('1')) * 2)

Buggy python submission (verdict: Time Limit Exceeded):
S = input()
len_s = len(S)
import re
while(True):
    S = re.sub('01|10',"",S)
    if ((not "01" in S) and (not "10" in S)):
        break
print(len_s - len(S))

Fixed submission:
S = input()
if len(S) == 1:
    print(0)
else:
    print(min(S.count('0'), S.count('1')) * 2)

Buggy python submission (verdict: Time Limit Exceeded):
S = input()
len_s = len(S)
while(True):
    S = S.replace("01", "")
    S = S.replace("10", "")
    if ((not "01" in S) and (not "10" in S)):
        break
print(len_s - len(S))

Fixed submission:
S = input()
if len(S) == 1:
    print(0)
else:
    print(min(S.count('0'), S.count('1')) * 2)

Buggy python submission (verdict: Time Limit Exceeded):
S = input()
len_s = len(S)
while(True):
    S = S.replace("01", "")
    S = S.replace("10", "")
    S = S.replace("01", "")
    S = S.replace("10", "")
    S = S.replace("01", "")
    S = S.replace("10", "")
    S = S.replace("01", "")
    S = S.replace("10", "")
    S = S.replace("01", "")
    S = S.replace("10", "")
    if not "01" in S:
        if not "10" in S:
            break
print(len_s - len(S))

Fixed submission:
S = input()
if len(S) == 1:
    print(0)
else:
    print(min(S.count('0'), S.count('1')) * 2)

Buggy python submission (verdict: Time Limit Exceeded):
S = input()
len_s = len(S)
while(True):
    S = S.replace("01","")
    S = S.replace("10", "")
    if not "01" in S:
        if not "10" in S:
            break
print(len_s - len(S))

Fixed submission:
S = input()
if len(S) == 1:
    print(0)
else:
    print(min(S.count('0'), S.count('1')) * 2)
Buggy python submission (verdict: Runtime Error):
N = int(input())
A = list(map(int, input().split()))
import math
ans = A[0]
for i in range(1, N):
    ans = math.gcd(ans, A[i])
print(ans)

Fixed submission:
N = int(input())
A = list(map(int, input().split()))
import fractions
ans = A[0]
for i in range(1, N):
    ans = fractions.gcd(ans, A[i])
print(ans)
Buggy python submission (verdict: Runtime Error):
N, K = map(int,input().split())
if N % 2 != 0:
    if (N/2 + 1) >= K:
    print("YES")
    else:
    print("NO")
else:
    if (N/2) >= K:
    print("YES")
    else:
    print("NO")


Fixed submission:
N, K = map(int,input().split())
if N % 2 != 0:
    if (N/2 + 1) >= K:
        print("YES")
    else:
        print("NO")
else:
    if (N/2) >= K:
        print("YES")
    else:
        print("NO")
Buggy python submission (verdict: Time Limit Exceeded):
S = input()
num = 0
while(True):
    num += S.count("BW")
    S = S.replace("BW", "WB")
    if not "BW" in S:
        break
print(num)

Fixed submission:
S = input()
indexes = [i for i, x in enumerate(S) if x == "W"]
print(sum([x-i for i, x in enumerate(indexes)]))

Buggy python submission (verdict: Runtime Error):
S = input()
num = 0
while(True):
    num += S.count("BW")
    S = S.replace("BW", "WB")
    print(S)
    if not "BW" in S:
        break
print(num)

Fixed submission:
S = input()
indexes = [i for i, x in enumerate(S) if x == "W"]
print(sum([x-i for i, x in enumerate(indexes)]))
Buggy python submission (verdict: Runtime Error):
N,*P=map(int,open(0);print(sum(P)-max(P)//2)

Fixed submission:
N,*P=map(int,open(0).read().split());print(sum(P)-max(P)//2)
Buggy python submission (verdict: Runtime Error):
N, K = map(int, input().split())
H = []
for i in range(N):
    h = int(input())
    H.append(h)
H = sorted(H)
mi = 10**9
for i in range(N-K+1):
    _ = H[i+K] - H[i]
    if mi > _:
        mi = _
print(mi)

Fixed submission:
N, K = map(int, input().split())
H = []
for i in range(N):
    h = int(input())
    H.append(h)
H = sorted(H)
mi = 10**9
for i in range(N-K+1):
    _ = H[i+(K-1)] - H[i]
    if mi > _:
        mi = _
print(mi)

Buggy python submission (verdict: Runtime Error):
N, K = map(int, input().split())
H = []
for i in range(N):
    h = int(input())
    H.append(h)
H = H.sorted()
mi = 10**9
for i in range(N-K+1):
    _ = H[i+K] - H[i]
    if mi > _:
        mi = _
print(mi)

Fixed submission:
N, K = map(int, input().split())
H = []
for i in range(N):
    h = int(input())
    H.append(h)
H = sorted(H)
mi = 10**9
for i in range(N-K+1):
    _ = H[i+(K-1)] - H[i]
    if mi > _:
        mi = _
print(mi)

Buggy python submission (verdict: Runtime Error):
N, K = map(int, input().split())
H = map(int, open(0))
H = H.sorted()
mi = 10**9
for i in range(N-K+1):
    _ = H[i+K] - H[i]
    if mi > _:
        mi = _
print(mi)

Fixed submission:
N, K = map(int, input().split())
H = []
for i in range(N):
    h = int(input())
    H.append(h)
H = sorted(H)
mi = 10**9
for i in range(N-K+1):
    _ = H[i+(K-1)] - H[i]
    if mi > _:
        mi = _
print(mi)
Buggy python submission (verdict: Runtime Error):
N, T = map(int, input().split())
cost = 1001
for i in range(N):
	c, t = map(int, input().split())
	if t < T:
		if c < cost:
			cost = c

if cost == 1001
	print("TLE")
else
	print(cost)

Fixed submission:
N, T = map(int, input().split())
cost = 1001
for i in range(N):
	c, t = map(int, input().split())
	if t <= T:
		if c < cost:
			cost = c

if cost == 1001:
	print("TLE")
else:
	print(cost)
Buggy python submission (verdict: Runtime Error):
N, M, X, Y = map(int, input().split())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))
flg = 'War'
for i in range(X, Y+1):
	if max(X) < i and i <= min(Y):
		flg = 'No ' + flg
		break
print(flg)

Fixed submission:
N, M, X, Y = map(int, input().split())
x = list(map(int, input().split()))
y = list(map(int, input().split()))
flg = 'War'
for i in range(X+1, Y+1):
	if max(x) < i and i <= min(y):
		flg = 'No ' + flg
		break
print(flg)
Buggy python submission (verdict: Runtime Error):
N, X = map(int, input().split())
x = list(map(int, input().split()))
for i in range(N):
    x[i] = abs(x[i] - X)
m = x[0]
import math
for i in range(1, N):
    m = math.gcd(m, x[i])
print(m)

Fixed submission:
N, X = map(int, input().split())
x = list(map(int, input().split()))
for i in range(N):
    x[i] = abs(x[i] - X)
m = x[0]
import fractions
for i in range(1, N):
    m = fractions.gcd(m, x[i])
print(m)
Buggy python submission (verdict: Runtime Error):
A = map(int, input().split())
print(max(A)-min(A))

Fixed submission:
A = list(map(int, input().split()))
print(max(A)-min(A))
Buggy python submission (verdict: Runtime Error):
a,b=input().split();print(100**a*b)

Fixed submission:
a,b=map(int,input().split());print((b+(b==100))*100**a)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
tot = 1
for i in range(1, N+1):
    tot *= i
print(tot % (10 ** 9 + 7))

Fixed submission:
N = int(input())
ans = 1
for i in range(1, N+1):
    ans = i * ans % (10 ** 9 + 7)
print(ans)
Buggy python submission (verdict: Runtime Error):
X, K, D = map(int, input().split())
if X + K * D <= 0:
  print(-X - K * D)
  elif X - K * D >= 0:
    print(X - K * D)
    else:
      mod = abs(X) // D
      if (K-mod) % 2 == 0:
        print(abs(abs(X) - K * mod))
      else:
        print(abs(abs(X) - K * (mod + 1)))

Fixed submission:
X, K, D = map(int, input().split())
if X + K * D <= 0:
    print(-X - K * D)
elif X - K * D >= 0:
    print(X - K * D)
else:
    div = X // D
    mod = X % D
    if (K-div) % 2 == 0:
        print(mod)
    else:
        print(abs(mod-D))
Buggy python submission (verdict: Runtime Error):
N=int(input())
if N%1000=0:
  print(0)
else:
  print(1000-(N%1000))

Fixed submission:
N=int(input())
if N%1000==0:
  print(0)
else:
  print(1000-(N%1000))
Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
A=[int(x) for x in input().split()]
A=sorted(A)
maxA=max(A)
ans=0
so_list=[1]*(maxA+1)
index=0
for i in range(N):
    now=A[i]
    if so_list[now]==1:
        index=0
        while(index+now<=maxA):
            so_list[index+now]=0
            index+=now
        if A.count(now)==1:
            ans+=1
            #print(now)

print(ans)

Fixed submission:
import bisect
N=int(input())
A=[int(x) for x in input().split()]
A=sorted(A)
maxA=max(A)
ans=0
so_list=[1]*(maxA+1)
index=0
i=0

while(i<N):
    flag=0
    now=A[i]
    if so_list[now]==1:
        index=0
        flag=1
        while(index+now<=maxA):
            so_list[index+now]=0
            index+=now
    right=bisect.bisect_right(A,now)#同じ数字はいくつある？
    if right-i==1:
        if flag==1:
            ans+=1
            #print(now)
        i=right
    else:
        i+=1

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
A=[int(x) for x in input().split()]
A=sorted(A)
maxA=max(A)
ans=0
so_list=[1]*(maxA+1)
index=0
for i in range(N):
    now=A[i]
    if so_list[now]==1:
        index=0
        while(index+now<=maxA):
            so_list[index+now]=0
            index+=now
        if A.count(now)==1:
            ans+=1
            #print(now)

print(ans)

Fixed submission:
import bisect
N=int(input())
A=[int(x) for x in input().split()]
A=sorted(A)
maxA=max(A)
ans=0
so_list=[1]*(maxA+1)
index=0
i=0

while(i<N):
    flag=0
    now=A[i]
    if so_list[now]==1:
        index=0
        flag=1
        while(index+now<=maxA):
            so_list[index+now]=0
            index+=now
    right=bisect.bisect_right(A,now)#同じ数字はいくつある？
    if right-i==1:
        if flag==1:
            ans+=1
            #print(now)
        i=right
    else:
        i+=1

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
H, N = map(int, input().split())
magiclist = [0]*N
dp = [0] * (N+1)
for s in range(N+1):
    dp[s] = [10**9] * (H + 1)
    dp[s][0] = 0
for i in range(N):
    magiclist[i] = [0]*2
    damage, mp = map(int, input().split())
    magiclist[i][0], magiclist[i][1] = damage, mp
    for j in range(H + 1):
        if j - damage < 0:
            dp[i + 1][j] = dp[i][j]
        else:
            dp[i + 1][j] = min(dp[i][j], (mp + dp[i + 1][j - damage]))
kouho = dp[N][H]
for h in range(N):
    kouho = min(kouho, min(dp[N][H-magiclist[h][0]:H])+magiclist[h][1])
print(kouho)


Fixed submission:
H, N = map(int, input().split())
magiclist = [0]*N
dp = [0] * (N+1)
for s in range(N+1):
    dp[s] = [10**9] * (H + 1)
    dp[s][0] = 0
for i in range(N):
    magiclist[i] = [0]*2
    damage, mp = map(int, input().split())
    magiclist[i][0], magiclist[i][1] = damage, mp
    for j in range(H + 1):
        if j - damage < 0:
            dp[i + 1][j] = dp[i][j]
        else:
            dp[i + 1][j] = min(dp[i][j], (mp + dp[i + 1][j - damage]))
kouho = dp[N][H]
for h in range(N):
    kouho = min(kouho, min(dp[N][H-magiclist[h][0]:H])+magiclist[h][1])
print(kouho)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = [int(x) for x in input().split()]
ans = 0
index = 1
if min(A) != 1:
    print(-1)
else:
    for i in range(N):
        left = A.pop(0)
        if left == index:
            index += 1
        else:
            ans += 1
    print(ans)


Fixed submission:
from collections import deque
N = int(input())
A = [int(x) for x in input().split()]
d = deque()
for i in range(N):
    d.append(A[i])
ans = 0
index = 1
if min(A) != 1:
    print(-1)
else:
    for i in range(N):
        left = d.popleft()
        if left == index:
            index += 1
        else:
            ans += 1
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = [int(x) for x in input().split()]
ans = 0
index = 1
if min(A) != 1:
    print(-1)
else:
    for i in range(N):
        left = A.pop(0)
        if left == index:
            index += 1
        else:
            ans += 1
    print(ans)


Fixed submission:
from collections import deque
N = int(input())
A = [int(x) for x in input().split()]
d = deque()
for i in range(N):
    d.append(A[i])
ans = 0
index = 1
if min(A) != 1:
    print(-1)
else:
    for i in range(N):
        left = d.popleft()
        if left == index:
            index += 1
        else:
            ans += 1
    print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())

NGlist = [0] * N
grouplist = [0]*N
ans = 0
for i in range(N):
    NGlist[i] = [0] * N
    grouplist[i] = [0] * N


for k in range(N):
    n = int(input())
    for j in range(n):
        x, y = map(int, input().split())
        if y == 0:
            NGlist[k][x-1] = 1
            NGlist[x - 1][k] = 1
        if y == 1:
            grouplist[k][x-1] = 1

for num in range(2 ** N):
    # print("num=")
    # print(num)
    group = set()
    newmember = set()
    for h in range(N):
        if h not in group and num % 2 == 1:
            group.add(h)
            newmember.add(h)
        num //= 2

    while (len(newmember) != 0):
        for s in list(newmember):
            for p in range(N):
                if grouplist[s][p] == 1 and p not in group:
                    group.add(p)
                    newmember.add(p)
                newmember.discard(s)

    len_group = len(group)
        # print(group)
    flag = 0
    if ans >= len_group:
       flag = 1
    
    # print(group)
    for m in group:
        for t in group:
            if NGlist[m][t] == 1:
                flag = 1
                break
        if flag == 1:
            break
    if flag == 0 and ans < len_group:
        ans = len_group

print(ans)


Fixed submission:
N = int(input())

NGlist = [0] * N
grouplist = [0]*N
ans = 0
for i in range(N):
    NGlist[i] = [0] * N
    grouplist[i] = [0] * N


for k in range(N):
    n = int(input())
    for j in range(n):
        x, y = map(int, input().split())
        if y == 0:
            NGlist[k][x-1] = 1
            NGlist[x - 1][k] = 1
        if y == 1:
            grouplist[k][x-1] = 1

for num in range(2 ** N):
    # print("num=")
    # print(num)
    group = set()
    newmember = set()
    for h in range(N):
        if h not in group and num % 2 == 1:
            group.add(h)
            newmember.add(h)
        num //= 2

    while (len(newmember) != 0):
        for s in list(newmember):
            for p in range(N):
                if grouplist[s][p] == 1 and p not in group:
                    group.add(p)
                    newmember.add(p)
                newmember.discard(s)

    len_group = len(group)
        # print(group)
    flag = 0
    if ans >= len_group:
       flag = 1
    
    # print(group)
    for m in group:
        for t in group:
            if NGlist[m][t] == 1:
                flag = 1
                break
        if flag == 1:
            break
    if flag == 0 and ans < len_group:
        ans = len_group

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
L = [int(x) for x in input().split()]
L = sorted(L)
ans = 0
for one in range(N - 2):
    for two in range(one+1, N - 1):
        for three in range(two + 1, N):
            if L[one] + L[two] > L[three]:
                ans += 1
print(ans)


Fixed submission:
import bisect
N = int(input())
L = [int(x) for x in input().split()]
L = sorted(L)
ans = 0
for one in range(N - 2):
    for two in range(one+1, N-1):
        ans += bisect.bisect_left(L, (L[one] + L[two]))-two-1
        #print(bisect.bisect_left(L, (L[one] + L[two]))-two-1)
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import math
N = int(input())
S = input()
ans = 1
ans_base = 1
numofS = 0  # 線の左端になっている点をSとするとその数はちょうどNでないといけない
line = 0  # 左から順に線を引く。上に何本通っているかをあらわす
for i in range(2*N):
    if S[i] == "B":
        if line % 2 == 0:
            numofS += 1
            line += 1
        else:
            ans_base *= line
            line -= 1
    else:
        if line % 2 == 0:
            ans_base *= line
            line -= 1
        else:
            line += 1
            numofS += 1

    if line < 0:
        ans = 0
if numofS != N:
    ans = 0
    # print(numofS)

if ans != 0:
    fact = math.factorial(N)
    ans = ans_base * fact
    ans %= 10**9+7
print(ans)


Fixed submission:
import math
N = int(input())
S = input()
ans = 1
ans_base = 1
numofS = 0  # 線の左端になっている点をSとするとその数はちょうどNでないといけない
line = 0  # 左から順に線を引く。上に何本通っているかをあらわす
for i in range(2*N):
    if S[i] == "B":
        if line % 2 == 0:
            numofS += 1
            line += 1
        else:
            ans_base *= line
            line -= 1
    else:
        if line % 2 == 0:
            ans_base *= line
            line -= 1
        else:
            line += 1
            numofS += 1

    if line < 0:
        ans = 0
        break
    ans_base %= 10**9+7
if numofS != N:
    ans = 0
    # print(numofS)

if ans != 0:
    fact = math.factorial(N)
    fact %= 10**9+7
    ans = ans_base * fact
    ans %= 10**9+7
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
water = [int(x) for x in input().split()]
rain = [0]*N
sum = 0
for i in water:
    sum += i

for k in range(N):
    sa = 0
    numofloop = 0
    ite = k + 1
    if (ite >= N):
        ite -= N
    while (numofloop < (N - 1) / 2):
        sa += water[ite]
        ite += 2
        if (ite >= N):
            ite -= N
        numofloop += 1
    sa *= 2
    rain[k] = sum - sa

print(' '.join(map(str, rain)))


Fixed submission:
# editorial を参考にした
N = int(input())
water = [int(x) for x in input().split()]
rain = [0]*N
sum = 0

for i in water:
    sum += i


sa = 0
numofloop = 0
ite = 1
while (numofloop < (N - 1) / 2):
    sa += water[ite]
    ite += 2
    if (ite >= N):
        ite -= N
    numofloop += 1
sa *= 2
rain[0] = sum - sa

for k in range(1, N):
    rain[k] = 2*water[k-1]-rain[k-1]

print(' '.join(map(str, rain)))
Buggy python submission (verdict: Runtime Error):
str = input()
minDistance = N
black = "#"
white = "."

for i in range(N):
    distance = 0
    loopnum = 0
    while (distance < minDistance and loopnum < N):
        for j in range(0, i):
            if str[j] == black:
                distance += 1
                loopnum += 1
            else:
                loopnum += 1
        for k in range(i, N - 1):
            if str[k] == white:
                distance += 1
                loopnum += 1
            else:
                loopnum += 1
    print("{}".format(distance))
    if (loopnum >= N-1):
        minDistance = distance

print("{}".format(minDistance))

Fixed submission:
# 今のままだと駄目
"""
ある境目を考える。境目より左が全て白、境目より右が全て黒でなくてはいけない。
ゆえに、境目より左の黒の数と境目より右の白の数を数えれば、その境目における「変更が必要な石の数」がわかる。
よって、境目を端から端まで動かしてその中で最小の「変更が必要な石の数」を求めればよい。
"""
N = int(input())
str = input()
minDistance = 0

black = "#"
white = "."
leftblack = 0
rightwhite = 0

for i in range(N):
    if str[i] == white:
        rightwhite += 1

minDistance += rightwhite

for j in range(0, N):
    if str[j] == black:
        leftblack += 1
    else:
        rightwhite -= 1
    if leftblack + rightwhite < minDistance:
        minDistance = leftblack+rightwhite

print("{}".format(minDistance))