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

s = 1
g = 0
i = 1
history = [s]
flag = [False] * n
flag[0] = True

while True:
    g = a[s-1]
    if flag[g-1] == True:
        break
    else:
        flag[g-1] = True
        history.append(g)
        s = g
        i += 1


x = history.index(g)

if k < n:
    ans = history[k]
else:
    d = (k-x) % (i - x)

    ans = history[x + d]

print(ans)


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

s = 1
g = 0
i = 1
history = [s]
flag = [False] * n
flag[0] = True

while True:
    g = a[s-1]
    if flag[g-1] == True:
        break
    else:
        flag[g-1] = True
        history.append(g)
        s = g
        i += 1


x = history.index(g)

if k < i:
    ans = history[k]
else:
    d = (k-x) % (i - x)

    ans = history[x + d]

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n, k = list(map(int, input().split()))
a = list(map(int, input().split()))
 
h = []
i = 0
s = 1
 
ans = 0
while i < k: 
  g = a[s-1]
  if g not in h:
    h.append(g)
    s = g
    i+=1
  else:
    c = h.index(g)
    l = (k-1-c) % (i-c)
    ans = h[c+l]
    break
    
if ans == 0:
  ans = h[-1]
 
print(ans)

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

s = 1
g = 0
i = 1
history = [s]
flag = [False] * n
flag[0] = True

while True:
    g = a[s-1]
    if flag[g-1] == True:
        break
    else:
        flag[g-1] = True
        history.append(g)
        s = g
        i += 1


x = history.index(g)

if k < i:
    ans = history[k]
else:
    d = (k-x) % (i - x)

    ans = history[x + d]

print(ans)

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

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

h = []
i = 0
s = 1

ans = 0
while i < 2*n: 
  g = a[s-1]
  h.append(g)
  if i == k - 1:
    ans = g
    sys.exit()
  else:
    s = g
    i+=1
j = collections.Counter(h)
m = j.most_common()[0][0]
l = [i for i, x in enumerate(h) if x == m]

d = (k - l[0]) % (l[1]-l[0])
ans = h[l[0]+d-1]

print(ans)

    

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

s = 1
g = 0
i = 1
history = [s]
flag = [False] * n
flag[0] = True

while True:
    g = a[s-1]
    if flag[g-1] == True:
        break
    else:
        flag[g-1] = True
        history.append(g)
        s = g
        i += 1


x = history.index(g)

if k < i:
    ans = history[k]
else:
    d = (k-x) % (i - x)

    ans = history[x + d]

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n, k = list(map(int, input().split()))
a = list(map(int, input().split()))

h = []
i = 0
s = 1

ans = 0
while i < k: 
  g = a[s-1]
  if g not in h:
    h.append(g)
    s = g
    i+=1
  else:
    c = h.index(g)
    l = (k-1-c) % (i-c)
    ans = h[c+l]
    break
    
if ans == 0:
  ans = h[-1]

print(ans)

    

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

s = 1
g = 0
i = 1
history = [s]
flag = [False] * n
flag[0] = True

while True:
    g = a[s-1]
    if flag[g-1] == True:
        break
    else:
        flag[g-1] = True
        history.append(g)
        s = g
        i += 1


x = history.index(g)

if k < i:
    ans = history[k]
else:
    d = (k-x) % (i - x)

    ans = history[x + d]

print(ans)