Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
def pow(base, nod):
	MOD = 10**9+7
	ans = 1
	tmp = 2
	while base>0:
		if base%2==1: ans=ans*tmp%MOD
		tmp = tmp**2%MOD
		base /= 2
	return ans

n=int(raw_input())
a=map(int,raw_input().split())
d={}
for i in xrange(n):
	if a[i] not in d: d[a[i]]=0
	d[a[i]]+=1
isValid=True
if n%2==0:
	for k,v in d:
		if k%2!=1 or v!=2:
		isValid=False
else:
	for k,v in d:
		if k%2!=0 or (k==0 and v!=1) or (k!=0 and v!=2):
		isValid=False
if isValid:
	print pow(2, n/2)
else:
	print 0

Fixed submission:
def pow(base, nod):
  MOD = 10**9+7
  ans = 1
  tmp = base
  while nod>0:
    if nod%2==1: ans=ans*tmp%MOD
    tmp = tmp**2
    tmp %= MOD
    nod /= 2
  return ans

n=int(raw_input())
a=map(int,raw_input().split())
d={}
for i in xrange(n):
  if a[i] not in d: d[a[i]]=0
  d[a[i]]+=1
isValid=True
if n%2==0:
  for k,v in d.items():
    if k%2!=1 or v!=2:
      isValid=False
else:
  for k,v in d.items():
    if k%2!=0 or (k==0 and v!=1) or (k!=0 and v!=2):
      isValid=False
if isValid:
  print pow(2, n/2)
else:
  print 0
Buggy python submission (verdict: Runtime Error):
n = int(input())
ans = 1
ans1 = 1
ans2 = 1
mod = 1000000007
for i in range(n):
	ans = (ans*10)%mod
    ans2 = (ans2*8)%mod
	ans1 = (ans1*9)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans + ans2)%mod
print(ans)


Fixed submission:
n = int(input())
ans = 1
ans1 = 1
ans2 = 1
mod = 1000000007
for i in range(n):
	ans = (ans*10)%mod
	ans2 = (ans2*8)%mod
	ans1 = (ans1*9)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans + ans2)%mod
print(ans)

Buggy python submission (verdict: Runtime Error):
n = int(input())
ans = 1
ans2 = 1
mod = 1000000007
for i in range(n):
	ans = (ans*10)%mod
    ans2 = (ans2*8)%mod
ans = (ans - ans2 + mod)%mod
print(ans)

Fixed submission:
n = int(input())
ans = 1
ans1 = 1
ans2 = 1
mod = 1000000007
for i in range(n):
	ans = (ans*10)%mod
	ans2 = (ans2*8)%mod
	ans1 = (ans1*9)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans - ans1 + mod)%mod
ans = (ans + ans2)%mod
print(ans)
Buggy python submission (verdict: Runtime Error):
s,w=mpa(int,input().split())
if(w>=s):
	print("unsafe")
else:
	print("safe")

Fixed submission:
s,w=map(int,input().split())
if(w>=s):
	print("unsafe")
else:
	print("safe")
Buggy python submission (verdict: Runtime Error):
n,d=map(int,input().split())
print(ceil(n/(2*d+1)))


Fixed submission:
from math import *
n,d=map(int,input().split())
print(ceil(n/(2*d+1)))
Buggy python submission (verdict: Time Limit Exceeded):
s=str(input())
arr=[]
for i in range(len(s)):
	arr.append(s[i])
ans=0
n=len(arr)
for i in range(len(s)-2):
	if(arr[i]+arr[i+1]+arr[i+2]=="ABC"):
		ans+=1
		arr[i]="B"
		arr[i+1]="C"
		arr[i+2]="A"
		j=i-1
		while(j>=0 and arr[j]=="A"):
			ans+=1
			arr[j]="B"
			arr[j+1]="C"
			arr[j+2]="A"
			j-=1
print(ans)







Fixed submission:
s=str(input())
arr=[]
for i in range(len(s)):
	arr.append(s[i])
ans=0
n=len(arr)
count=0
i=0
while(i<n-2):
	if(arr[i]+arr[i+1]+arr[i+2]=="ABC"):
		ans+=1
		arr[i]="B"
		arr[i+1]="C"
		arr[i+2]="A"
		j=i-1
		i+=2
		ans+=count
	else:
		if(arr[i]=="A"):
			count+=1
		else:
			count=0
		i+=1
print(ans)
Buggy python submission (verdict: Runtime Error):
n=int(input())
arr=list(map(int,input().split()))
arr2=lisT9map(int,input().split())
ans=0
for i in range(n):
	if(arr[i]-arr2[i]>0):
		ans+=arr[i]-arr2[i]

	#ans=max(ans,arr[i]-arr2[i])
print(ans)


Fixed submission:
n=int(input())
arr=list(map(int,input().split()))
arr2=list(map(int,input().split()))
ans=0
for i in range(n):
	if(arr[i]-arr2[i]>0):
		ans+=arr[i]-arr2[i]

	#ans=max(ans,arr[i]-arr2[i])
print(ans)

Buggy python submission (verdict: Runtime Error):
n=int(input())
arr=list(map(int,input().split()))
arr2=lisT9map(int,input().split())
ans=0
for i in range(n):
	if(arr[i]-arr2[i]>0):
		ans+=arr[i]-arr2[i]

	#ans=max(ans,arr[i]-arr2[i])
print(ans)


Fixed submission:
n=int(input())
arr=list(map(int,input().split()))
arr2=list(map(int,input().split()))
ans=0
for i in range(n):
	if(arr[i]-arr2[i]>0):
		ans+=arr[i]-arr2[i]

	#ans=max(ans,arr[i]-arr2[i])
print(ans)
Buggy python submission (verdict: Runtime Error):
arr=[]
for i in range(5):
	t=int(input())
	arr.append(t)
ans=0
arr2=[]
for i in range(5):
	if(arr[i]%10==0):
		ans+=arr[i]
	else:
		ans+=((arr[i]//10)+1)*10
		arr2.append(arr[i]%10)
ans-=10
ans+=min(arr2)
print(ans)






Fixed submission:
arr=[]
for i in range(5):
	t=int(input())
	arr.append(t)
ans=0
arr2=[]
for i in range(5):
	if(arr[i]%10==0):
		ans+=arr[i]
	else:
		ans+=((arr[i]//10)+1)*10
		arr2.append(arr[i]%10)
if(len(arr2)>0):
	ans-=10
	ans+=min(arr2)
print(ans)
Buggy python submission (verdict: Runtime Error):
import queue
import copy
 
def ngoin(bo,now):
    return 0 <= now[0] and now[0] < len(bo) and 0 <= now[1] and now[1] < len(bo[0])
 
def minido(bo,si,sj):
    tb = [[False for i in range(len(bo[0]))] for j in range(len(bo))]
    q = queue.Queue()
    q.put([si,sj,0])
    tb[si][sj] = True
    ret = 0
    while not q.empty():
        now = q.get()
        ret = now[2]
        if ngoin(bo,[now[0]-1,now[1]]):
            if bo[now[0]-1][now[1]] and not tb[now[0]-1][now[1]]:
                q.put([now[0]-1,now[1],now[2]+1])
                tb[now[0]-1][now[1]] = True
                
        if ngoin(bo,[now[0],now[1]+1]):
            if bo[now[0]][now[1]+1] and not tb[now[0]][now[1]+1]:
                q.put([now[0],now[1]+1,now[2]+1])
                tb[now[0]][now[1]+1] = True
                
        if ngoin(bo,[now[0]+1,now[1]]):
            if bo[now[0]+1][now[1]] and not tb[now[0]+1][now[1]]:
                q.put([now[0]+1,now[1],now[2]+1])
                tb[now[0]+1][now[1]] = True
                
        if ngoin(bo,[now[0],now[1]-1]):
            if bo[now[0]][now[1]-1] and not tb[now[0]][now[1]-1]:
                q.put([now[0],now[1]-1,now[2]+1])
                tb[now[0]][now[1]-1] = True
    return ret
            
 
h,w = map(int,input().split())
bo = [[True if x == '.' else False for x in input()] for i in range(h)]
grap = [[float('inf') for i in range(h*w)] for j in range(h*w)]
ans = 0
for i in range(h*w):
    grap[i][i] = 0
for si in range(h):
    for sj in range(w):
        if not bo[si][sj]:
            continue
        ans = max(ans,minido(bo,si,sj))
                
print(ans)


Fixed submission:
a = input()
print(chr(ord(a)+1))
Buggy python submission (verdict: Runtime Error):
m = 998244353
def myPow(a,b):
    a %= m
    if b == 1:
        return a%m
    elif b == 0:
        return 1
    if b%2 == 0:
        return myPow(a**2,b//2)%m
    else:
        return (a%m)*myPow(a**2,(b-1)//2)%m

n = int(input())
ngo = [0]*n
d = list(map(int,input().split()))
for i in range(n):
    ngo[d[i]]+=1
if ngo[0] != 1:
    print(0)
    exit(0)
ans = 1
for i in range(n-1):
    ans = (ans*myPow(ngo[i],ngo[i+1])%m)%m
print(ans%m)

Fixed submission:
n = int(input())
if n == 1:
    print(0)
    exit(0)
l = 1
r = n-1
ans = 0
while l < r:
    l+=1
    r-=1
    ans += 1
print(ans)
Buggy python submission (verdict: Runtime Error):
import queue
import numpy as np
n = int(input())
class Node:
    def __init__(self):
        self.nextNode = []
        self.checkNgo = -1
        self.group = -1
        
Nodes = [Node() for i in range(n)]
for i in range(n):
    s = input()
    for j in range(len(s)):
        if s[j] == '1':
            Nodes[i].nextNode.append(j)
            
def check(node,ngo):
    if node.checkNgo == -1:
        node.checkNgo = ngo
    elif node.checkNgo != ngo:
        return False
    elif node.checkNgo == ngo:
        return True
    for i in node.nextNode:
        if not check(Nodes[i],(ngo+1)%2):
            return False
    return True
    
def ngoCheck():
    stack = [Nodes[0]]
    Nodes[0].checkNgo = 0
    while stack:
        node = stack.pop()
        for i in node.nextNode:
            if Nodes[i].checkNgo != -1 and Nodes[i].checkNgo == node.checkNgo:
                return False
            if Nodes[i].checkNgo == -1:
                Nodes[i].checkNgo = (node.checkNgo+1)%2
                stack.append(Nodes[i])
    return True
    
if not ngoCheck():
    print(-1)
    exit(0)
    
def solv():
    d = [[0 for i in range(n)] for j in range(n)]
    for i in range(n):
        for j in range(n):
            if j in Nodes[i].nextNode:
                d[i][j] = 1
            else:
                d[i][j] = np.inf
    for k in range(n):
        for i in range(n):
            for j in range(n):
                if d[i][j] > d[i][k]+d[k][j]:
                    d[i][j] = d[i][k]+d[k][j]
    return d
    
def saidai(d):
    maxi = 0
    for i in range(n):
        for j in range(n):
            maxi = max(maxi,d[i][j])
    return maxi
    
d = solv()
print(saidai(d)+1)

Fixed submission:
s = input()
k = int(input())

if len(s) == 1:
    print(k//2)
    exit(0)

if len(list(set(s))) == 1 and len(s)%2 == 1:
    print((len(s)//2)*k+k//2)
    exit(0)

count = 0
    
ngo = 1
for i in range(len(s)-1):
    if s[i] == s[i+1]:
        ngo+=1
    else:
        count += ngo//2
        ngo=1
count += ngo//2

ngongo = 0
while ngongo < len(s) and s[len(s)-ngongo-1] == s[-1]:
    ngongo+=1

ngongongo = 0
while ngongongo < len(s) and s[ngongongo] == s[0]:
    ngongongo += 1
    
f = 0
if ngongo %2 == 1 and ngongongo %2 == 1 and s[0] == s[-1]:
    count += 1
    f += 1

print(count*k-f)
Buggy python submission (verdict: Runtime Error):
# coding: utf-8
# Your code here!

a,b = input().split()
a = int(a)
b = int(b)
ngo = 1
ans = 0
while ngo < b:
    ngo += a-1
    ans + =1
print(ans)

Fixed submission:
# coding: utf-8
# Your code here!

a,b = input().split()
a = int(a)
b = int(b)
ngo = 1
ans = 0
while ngo < b:
    ngo += a-1
    ans += 1
print(ans)
Buggy python submission (verdict: Runtime Error):
n = int(input())
ans = 0
for i in range(i,n+1):
  if len(str(i))%2 != 0:
    ans += 1
print(ans)
 

Fixed submission:
n = int(input())
ans = 0
for i in range(1,n+1):
  if len(str(i))%2 != 0:
    ans += 1
print(ans)
Buggy python submission (verdict: Runtime Error):
import math
n,k = map(int,input().split())
for i in range(1,k+1):
    t = 1
    c = math.factorial(n-k+1)//(math.factorial(i)*math.factorial(n-k+1-i))
    h = math.factorial(i+(k-i)-1)//(math.factorial(k-i)*math.factorial(i-1))
    print((c*h)%(10**9+7))


Fixed submission:
import math
n,k = map(int,input().split())
for i in range(1,k+1):
    if n-k-i+1 < 0:
        print(0)
        continue
    c = math.factorial(n-k+1)//(math.factorial(i)*math.factorial(n-k+1-i))
    h = math.factorial(k-1)//(math.factorial(k-i)*math.factorial(i-1))
    print((c*h)%(10**9+7))
Buggy python submission (verdict: Runtime Error):
import math
a,b,c,d = map(int,input().split())
t1 = b//c-a//c
if a%c == 0:
    t1 += 1
t2 = b//d-a//d
if a%d == 0:
    t2 += 1
lcm = c*d//math.gcd(c,d)
t3 = b//lcm-a//lcm
if a%lcm == 0:
    t3 += 1
print(b-a+1-(t1+t2-t3))

Fixed submission:
import fractions
a,b,c,d = map(int,input().split())
t1 = b//c-a//c
if a%c == 0:
    t1 += 1
t2 = b//d-a//d
if a%d == 0:
    t2 += 1
lcm = c*d//fractions.gcd(c,d)
t3 = b//lcm-a//lcm
if a%lcm == 0:
    t3 += 1
print(b-a+1-(t1+t2-t3))
Buggy python submission (verdict: Runtime Error):
a,b = map(int,input().split())
print((a*3+p)//2)

Fixed submission:
a,b = map(int,input().split())
print((a*3+b)//2)
Buggy python submission (verdict: Runtime Error):
import bisec
n = int(input())
a = sorted(list(map(int,input().split())))
t = bisec.bisec_left(a,a[n-1]//2)
if t == 0:
    print(a[n-1],a[t])
else:
    if abs(a[n-1]//2-a[t]) > abs(a[n-1]//2-a[t-1]):
        print(a[n-1],a[t-1])
    else:
        print(a[n-1],a[t])

Fixed submission:
import bisect
n = int(input())
a = sorted(list(map(int,input().split())))
ans = 0
mini = float('inf')
for i in range(n):
    if mini > abs(a[i]-a[n-1]/2):
        ans = i
        mini = abs(a[i]-a[n-1]/2)
print(a[n-1],a[ans])
Buggy python submission (verdict: Runtime Error):
s=input().split()
a=int(s[0])
op=s[1]
b=int(s[1])
if op=="+":
 print(a+b)
elif op=="=":
 print(a-b)

Fixed submission:
s=input().split()
a=int(s[0])
op=s[1]
b=int(s[2])
if op=="+":
 print(a+b)
elif op=="-":
 print(a-b)
Buggy python submission (verdict: Time Limit Exceeded):
import sys
n=int(input())
array=[int(i) for i in input().split()]

if n%2==0:
    sub=1
else:
    sub=2
    if array.count(0) != 1:
        print(0)
        sys.exit()

for i in range(sub,n,2):
    if array.count(i) != 2:
        print(0)
        sys.exit()


print(2**int(n/2))

Fixed submission:
import sys
n=int(input())
array=list(map(int, input().split()))

if not (0<=min(array) and max(array)<n):
    print(0)
    sys.exit()

if n%2==0:
    if (n**2)/2 != sum(array):
        print(0)
        sys.exit()
else:
    if (n**2-1)/2 != sum(array):
        print(0)
        sys.exit()

sub_list=list(set(array))

if n%2==0:
    if int(n/2)==len(sub_list):
        print((2 ** int(n / 2))%(10**9 + 7))
    else:
        print(0)
else:
    if int(n/2)==len(sub_list)-1:
        print((2 ** int(n / 2)) % (10 ** 9 + 7))
    else:
        print(0)

Buggy python submission (verdict: Runtime Error):
n=int(input())
list=[int(i) for i in input().split()]

list.sort()

if n%2==0:
    count=0
else: count=1
while count<n and list[count]==list[count+1]:
    count+=2
if count>=len(list):
    if n%2==0:
        print(int(2**(n/2)))
    else:
        print(int(2**((n-1)/2)))
else:
    print(0)

Fixed submission:
import sys
n=int(input())
array=list(map(int, input().split()))

if not (0<=min(array) and max(array)<n):
    print(0)
    sys.exit()

if n%2==0:
    if (n**2)/2 != sum(array):
        print(0)
        sys.exit()
else:
    if (n**2-1)/2 != sum(array):
        print(0)
        sys.exit()

sub_list=list(set(array))

if n%2==0:
    if int(n/2)==len(sub_list):
        print((2 ** int(n / 2))%(10**9 + 7))
    else:
        print(0)
else:
    if int(n/2)==len(sub_list)-1:
        print((2 ** int(n / 2)) % (10 ** 9 + 7))
    else:
        print(0)
Buggy python submission (verdict: Time Limit Exceeded):
n,x=[int(i) for i in input().split()]
a=[int(i) for i in input().split()]

sum=0
for i in range(n):
    if(a[i]>x):
        temp=a[i]-x
        a[i]-=temp
        sum+=temp
    if(i>0):
        while(x<a[i]+a[i-1]):
            a[i]-=1
            sum+=1
print(sum)

Fixed submission:
n,x=[int(i) for i in input().split()]
a=[int(i) for i in input().split()]

sum=0
for i in range(n):
    if(a[i]>x):
        temp=a[i]-x
        a[i]-=temp
        sum+=temp
    if(i>0):
        temp=a[i]+a[i-1]
        if(x<temp):
            a[i]-=temp-x
            sum+=temp-x
print(sum)

Buggy python submission (verdict: Time Limit Exceeded):
n,x=[int(i) for i in input().split()]
a=[int(i) for i in input().split()]

sum=0
for i in range(n):
    if(a[i]>x):
        temp=a[i]-x
        a[i]-=temp
        sum+=temp
for i in range(1,n):
    while(x<(a[i]+a[i-1])):
        a[i]-=1
        sum+=1
print(sum)

Fixed submission:
n,x=[int(i) for i in input().split()]
a=[int(i) for i in input().split()]

sum=0
for i in range(n):
    if(a[i]>x):
        temp=a[i]-x
        a[i]-=temp
        sum+=temp
    if(i>0):
        temp=a[i]+a[i-1]
        if(x<temp):
            a[i]-=temp-x
            sum+=temp-x
print(sum)
Buggy python submission (verdict: Runtime Error):
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n = int(input())
a = list(map(int, input().split()))

a.sort(reverse=True)
ans = 0

for i in range(n):
    for j in range(n):
        if a[i] % a[n - j - 1] == 0 and i != n - j - 1:
            break
        if j == n - 1:
            ans += 1

print(ans)

Fixed submission:
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

x = list(map(int,input().split()))

for i in range(5):
    if x[i] != i + 1:
        print(i+1)
        break
Buggy python submission (verdict: Time Limit Exceeded):
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n = int(input())
a = list(map(int,input().split()))

ans = 1
sub = 10 ** 18

for i in a:
    ans *= i

if ans > sub:
    ans = -1
print(ans)

Fixed submission:
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n = int(input())
a = list(map(int,input().split()))

ans = 1
sub = 10 ** 18
for i in range(n):
    if a[i] == 0:
        print("0")
        exit()
for i in a:
    ans *= i
    if ans > sub:
        ans = -1
        break

print(ans)
Buggy python submission (verdict: Runtime Error):
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

t = list(input())

for i in range(len(t)):
    if (t[i] == '?' and i == 0):
        if t[i + 1] == 'D':
            print("P", end="")
        else:
            print("D", end="")
    elif (t[i] == "?"):
        if t[i - 1] == "D":
            print("P",end="")
        else:
            print("D", end="")
    else:
        print(t[i],end="")


Fixed submission:
#デフォルト
import itertools
from collections import defaultdict
import collections
import math
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

t = list(input())

for i in range(len(t)):
    if (t[i] == "?"):
        print("D",end="")
    else:
        print(t[i],end="")
Buggy python submission (verdict: Runtime Error):
import itertools
from collections import defaultdict
import collections
import math
import sys
import queue
sys.setrecursionlimit(200000)
mod = 1000000007

n, m = map(int, input().split())

graph = {i: [] for i in range(1, m + 1)}
for _ in range(m):
    u, v = map(int, input().split())
    graph[u].append(v)
    graph[v].append(u)

tf = [False] * (n + 1)
sirube = [0] * (n + 1)
def bfs(v):
    q = queue.Queue()
    q.put([v,0])
    tf[v] = True
    while not q.empty():
        sub = q.get()
        now = sub[0]
        before = sub[1]
        for next in graph[now]:
            if tf[next]:
                continue
            tf[next] = True
            if sirube[next] == 0:
                sirube[next] = now
            q.put([next, now])

bfs(1)
for i in range(2, n + 1):
    if sirube[i] == 0:
        print("No")
        exit()

print("Yes")
for i in range(2, n + 1):
    print(sirube[i])

Fixed submission:
import itertools
from collections import defaultdict
import collections
import math
import sys
import queue
sys.setrecursionlimit(200000)
mod = 1000000007

n, m = map(int, input().split())

graph = {i: [] for i in range(1, n + 1)}
for _ in range(m):
    u, v = map(int, input().split())
    graph[u].append(v)
    graph[v].append(u)

tf = [False] * (n + 1)
sirube = [0] * (n + 1)
def bfs(v):
    q = queue.Queue()
    q.put([v,0])
    tf[v] = True
    while not q.empty():
        sub = q.get()
        now = sub[0]
        before = sub[1]
        for next in graph[now]:
            if tf[next]:
                continue
            tf[next] = True
            if sirube[next] == 0:
                sirube[next] = now
            q.put([next, now])

bfs(1)
for i in range(2, n + 1):
    if sirube[i] == 0:
        print("No")
        exit()

print("Yes")
for i in range(2, n + 1):
    print(sirube[i])
Buggy python submission (verdict: Runtime Error):
import itertools
from collections import defaultdict
import collections
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n, k = map(int, input().split())
a = list(map(int, input().split()))

tf = [False] * (n + 1)
tf[1] = True
ss = [1]
cnt = 0
while cnt < k:
    if len(ss) != 1 and tf[a[ss[cnt] - 1]]:
        d = a[ss[cnt] - 1]
        break
    tf[a[ss[cnt] - 1]] = True
    ss.append(a[ss[cnt] - 1])
    cnt += 1


sss = ss.index(d)
print(ss[sss+(k -len(ss)) % (len(ss) - sss)])
    # print(ss.index(d))
    # print(ss[k % (len(ss) - ss.index(d))])

Fixed submission:
import itertools
from collections import defaultdict
import collections
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n, k = map(int, input().split())
a = list(map(int, input().split()))

tf = [False] * (n + 1)
tf[1] = True
ss = [1]
cnt = 0
while cnt < max(k,n ** 2):
    if len(ss) != 1 and tf[a[ss[cnt] - 1]]:
        d = a[ss[cnt] - 1]
        break
    tf[a[ss[cnt] - 1]] = True
    ss.append(a[ss[cnt] - 1])
    cnt += 1

if len(ss) > k:
    print(ss[k])
else:
    sss = ss.index(d)
    print(ss[sss+(k -len(ss)) % (len(ss) - sss)])
    # print(ss.index(d))
    # print(ss[k % (len(ss) - ss.index(d))])

Buggy python submission (verdict: Runtime Error):
import itertools
from collections import defaultdict
import collections
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n, k = map(int, input().split())
a = list(map(int, input().split()))

tf = [False] * (n + 1)
tf[1] = True
ss = [1]
cnt = 0
while cnt < n ** 2:
    if len(ss) != 1 and tf[a[ss[cnt] - 1]]:
        d = a[ss[cnt] - 1]
        break
    tf[a[ss[cnt] - 1]] = True
    ss.append(a[ss[cnt] - 1])
    cnt += 1

if len(ss) >= k:
    print(ss[k])
else:
    print(ss[ss.index(d)+(k -len(ss)) % (len(ss) - ss.index(d))])
    # print(ss.index(d))
    # print(ss[k % (len(ss) - ss.index(d))])

Fixed submission:
import itertools
from collections import defaultdict
import collections
import sys
sys.setrecursionlimit(200000)
mod = 1000000007

n, k = map(int, input().split())
a = list(map(int, input().split()))

tf = [False] * (n + 1)
tf[1] = True
ss = [1]
cnt = 0
while cnt < max(k,n ** 2):
    if len(ss) != 1 and tf[a[ss[cnt] - 1]]:
        d = a[ss[cnt] - 1]
        break
    tf[a[ss[cnt] - 1]] = True
    ss.append(a[ss[cnt] - 1])
    cnt += 1

if len(ss) > k:
    print(ss[k])
else:
    sss = ss.index(d)
    print(ss[sss+(k -len(ss)) % (len(ss) - sss)])
    # print(ss.index(d))
    # print(ss[k % (len(ss) - ss.index(d))])
Buggy python submission (verdict: Runtime Error):
n, k = map(int, input().split())

d = [0] * n
a = []
snuk = [False] * n
for i in range(k):
    d[i] = int(input())
    a = list(map(int, input().split()))
    for j in a:
        snuk[j - 1] = True
    

ans = 0
for i in range(n):
    if snuk[i] == False:
        ans += 1


print(ans)

Fixed submission:
n, k = map(int, input().split())

d = [0] * k
a = []
snuk = [False] * n
for i in range(k):
    d[i] = int(input())
    a = list(map(int, input().split()))
    for j in a:
        snuk[j - 1] = True
    

ans = 0
for i in range(n):
    if snuk[i] == False:
        ans += 1


print(ans)

Buggy python submission (verdict: Runtime Error):
n, k = map(int, input().split())

d = [0] * n
a = []
snuk = [False] * n
for i in range(k):
    d[i] = int(input())
    a = list(map(int, input().split()))
    for j in a:
        snuk[j - 1] = True
    

ans = 0
for i in range(n):
    if snuk[i] == False:
        ans += 1


print(ans)

Fixed submission:
n, k = map(int, input().split())

d = [0] * k
a = []
snuk = [False] * n
for i in range(k):
    d[i] = int(input())
    a = list(map(int, input().split()))
    for j in a:
        snuk[j - 1] = True
    

ans = 0
for i in range(n):
    if snuk[i] == False:
        ans += 1


print(ans)