Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Time Limit Exceeded):
def is_prime(n):
    if n == 1:
        return False
    for i in range(2,int(n**0.5)+1):
        if n%i == 0:
            return False
    return True

N,M = map(int,input().split())
ans = M//N

if is_prime(M):
    ans = 1
else:
    while M%ans != 0 and ans != 1:
        ans -= 1
print(ans)


Fixed submission:
from bisect import bisect_right

def divisor(n):
    ass = []
    for i in range(1,int(n**0.5)+1):
        if n%i == 0:
            ass.append(i)
            if i**2 == n:
                continue
            ass.append(n//i)
    ass.sort()
    return ass 


N,M = map(int,input().split())
a = M//N
c = True

li = divisor(M)

x = bisect_right(li,a)

print(li[x-1])

Buggy python submission (verdict: Time Limit Exceeded):
N,M = map(int,input().split())
ans = M//N
while M%ans != 0 and ans != 1:
    ans -= 1
print(ans)


Fixed submission:
from bisect import bisect_right

def divisor(n):
    ass = []
    for i in range(1,int(n**0.5)+1):
        if n%i == 0:
            ass.append(i)
            if i**2 == n:
                continue
            ass.append(n//i)
    ass.sort()
    return ass 


N,M = map(int,input().split())
a = M//N
c = True

li = divisor(M)

x = bisect_right(li,a)

print(li[x-1])

Buggy python submission (verdict: Time Limit Exceeded):
N,M = map(int,input().split())
a = M//N
c = True
while c:
    if M%a == 0:
        c = False
    else:
        a -= 1
print(a)


Fixed submission:
from bisect import bisect_right

def divisor(n):
    ass = []
    for i in range(1,int(n**0.5)+1):
        if n%i == 0:
            ass.append(i)
            if i**2 == n:
                continue
            ass.append(n//i)
    ass.sort()
    return ass 


N,M = map(int,input().split())
a = M//N
c = True

li = divisor(M)

x = bisect_right(li,a)

print(li[x-1])
Buggy python submission (verdict: Runtime Error):
import fractions

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

for n in range(N):
    x[n] = abs(x[n]-X)
ans = fractions.gcd(x[0],x[1])
for n in range(2,N):
    ans = fractions.gcd(ans,x[n])
print(ans)


Fixed submission:
import fractions
 
N,X = map(int,input().split())
x = list(map(int,input().split()))
 
for n in range(N):
    x[n] = abs(x[n]-X)

if N == 1:
    ans = x[0]

else:
    ans = fractions.gcd(x[0],x[1])
    for n in range(2,N):
        ans = fractions.gcd(ans,x[n])

print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
A = list(map(int,input().split()))
B = [A[i]-i-1 for i in range(N)]
B.sort()

ave = B[N//2]
ans = 0
for i in range(N):
    ans1 += abs(B[i]-ave)
print(ans)

Fixed submission:
N = int(input())
A = list(map(int,input().split()))
B = [A[i]-i-1 for i in range(N)]
B.sort()

ave1,ave2 = B[N//2],B[N//2-1]
ans1,ans2 = 0,0
for i in range(N):
    ans1 += abs(B[i]-ave1)
    ans2 += abs(B[i]-ave2)
print(min(ans1,ans2))
Buggy python submission (verdict: Time Limit Exceeded):
N,C = map(int,input().split())
D = [list(map(int,input().split())) for _ in range(C)]
c = [list(map(int,input().split())) for _ in range(N)]

cst = [[0,0,0] for i in range(C)]

for clr in range(1,C+1):
    for i in range(N):
        for j in range(N):
            cst[clr-1][(i+j+2)%3] += D[c[i][j]-1][clr-1]

ans = 10**10

for i in range(C):
    for j in range(C):
        for k in range(C):
            if i == j or i == k or j == k:
                continue
            ans = min(ans,cst[i][0]+cst[j][1]+cst[k][2])

print(ans)


Fixed submission:
N,C = map(int,input().split())
D = [list(map(int,input().split())) for _ in range(C)]
c = [list(map(int,input().split())) for _ in range(N)]

cst = [[0,0,0] for i in range(C)]

for clr in range(1,C+1):
    for i in range(N):
        for j in range(N):
            cst[clr-1][(i+j+2)%3] += D[c[i][j]-1][clr-1]

ans = 10**10

for i in range(C):
    for j in range(C):
        for k in range(C):
            if i == j or i == k or j == k:
                continue
            ans = min(ans,cst[i][0]+cst[j][1]+cst[k][2])

print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int,input().split()))

c = [0 for j in range(20)]

l = 0

ans = 0

for r,a in enumerate(A):
    
    for j in range(20):
        c[j] += (a>>j)&1
    
    while sum(c[j] < 2 for j in range(20)) != 20:

        b = A[l]
        for j in range(20):
            c[j] -= (b>>j)&1
        l += 1
    
    ans += (r-l+1)

print(ans)


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

c = [0 for j in range(20)]

l = 0

ans = 0

for r,a in enumerate(A):
    
    for j in range(20):
        c[j] += (a>>j)&1
    
    while sum(c[j] < 2 for j in range(20)) != 20:

        b = A[l]
        for j in range(20):
            c[j] -= (b>>j)&1
        l += 1
    
    ans += (r-l+1)

print(ans)
Buggy python submission (verdict: Runtime Error):
N,Q = map(int,input().split())

par = [i for i in range(N+1)]
rank = [1 for i in range(N+1)]

# 木の根を求める
def root(x):
    if par[x] == x:
        return x
    else:
        par[x] = root(par[x])
        return par[x]

# xとyが同じ集合に属するか否か
def bool_same(x,y):
    return root(x) == root(y)

# xとyの属する集合を併合(ランク有)
def unite(x,y):
    x = root(x)
    y = root(y)
    if x != y:
        if rank[x] < rank[y]:
            par[x] = y
            rank[y] += rank[x]
        else:
            par[y] = x
            rank[x] += rank[y]

for i in range(Q):
    p,a,b = map(int,input().split())
    if p == 0:
        unite(a,b)
    else:
        print('Yes' if bool_same(a,b) else 'No')

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

par = [i for i in range(N+1)]

# 木の根を求める
def root(x):
    if par[x] == x:
        return x
    else:
        par[x] = root(par[x])
        return par[x]

# xとyが同じ集合に属するか否か
def bool_same(x,y):
    return root(x) == root(y)

# xとyの属する集合を併合
def unite(x,y):
    x = root(x)
    y = root(y)
    if x != y:
        par[x] = y

p = [0] + list(map(int,input().split()))

for i in range(M):
    a,b = map(int,input().split())
    unite(a,b)

ans = 0
for i in range(1,N+1):
    if bool_same(i,p[i]):
        ans += 1

print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
AB = [list(map(int,input().split())) for i in range(N)]
CD = [list(map(int,input().split())) for i in range(N)]

AB.sort()
CD.sort()

#print(AB)
#print(CD)

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

for i in range(N):
    ab = AB[i]
    for j in range(N):
        cd = CD[j]
        if ab[0] < cd[0] and ab[1] < cd[1]:
            li[i].append(cd)

#print(li)

newli = []
for i in range(N):
    if li[i] != []:
        newli.append(li[i])
    else:
        N -= 1

li = newli

ans = 0
while len(li) != 0:
    l = 1000
    
    for i in range(N):
        l = min(l,len(li[i]))

    for i in range(N):
        if len(li[i]) == l:
            rem = li[i].pop()
            li.remove(remli)
            N -= 1
            ans += 1
            break
    

    for j in range(N):
        if rem in li[j]:
            li[j].remove(rem)

    newli = []
    for i in range(N):
        if li[i] != []:
            newli.append(li[i])
        else:
            N -= 1

    li = newli

print(ans)


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

AB.sort()
CD.sort()

#print(AB)
#print(CD)

ans = 0

for cd in CD:
    li = []
    for ab in AB:
        if ab[0] < cd[0] and ab[1] < cd[1]:
            li.append(ab)
    li.sort(key=lambda x: x[1])
    if len(li) != 0:
        AB.remove(li[-1])
        ans += 1

print(ans)
Buggy python submission (verdict: Runtime Error):
from collections import deque
def gridbfs(grid,sy,sx):
    INF = 10**18
 
    gridy = len(grid)
    gridx = len(grid[0])
 
    dist = [[INF]*gridx for _ in range(gridy)]
    dist[sy][sx] = 0
    q = deque([(sy,sx)])
 
    while q:
        y,x = q.popleft()
        for dy,dx in [(-1,0),(1,0),(0,-1),(0,1)]:
            ny,nx = y+dy, x+dx
            if not (0 <= ny < gridy and 0 <= nx < gridx):
                continue
            if grid[ny][nx] == 'X':
                continue
            if dist[ny][nx] != INF:
                continue
            dist[ny][nx] = dist[y][x] + 1
            q.append((ny,nx))
 
    return dist
 
H,W = map(int,input().split())
 
Grid = [input() for _ in range(H)]
 
cnt = 0
 
for i in range(H):
    cnt += Grid[i].count('.')
 
d = gridbfs(Grid,0,0)
 
print(max(-1, cnt - d[H-1][W-1] -1))
from collections import deque
def gridbfs(grid,sy,sx):
    INF = 10**18

    gridy = len(grid)
    gridx = len(grid[0])

    dist = [[INF]*gridx for _ in range(gridy)]
    dist[sy][sx] = 0
    q = deque([(sy,sx)])

    while q:
        y,x = q.popleft()
        for dy,dx in [(-1,0),(1,0),(0,-1),(0,1)]:
            ny,nx = y+dy, x+dx
            if not (0 <= ny < gridy and 0 <= nx < gridx):
                continue
            if grid[ny][nx] == '#':
                continue
            if dist[ny][nx] != INF:
                continue
            dist[ny][nx] = dist[y][x] + 1
            q.append((ny,nx))

    return dist

H,W = map(int,input().split())

Grid = [input() for _ in range(H)]

cnt = 0

for i in range(H):
    cnt += Grid[i].count('.')

d = gridbfs(Grid,0,0)

print(max(-1, cnt - d[H-1][W-1] -1))

Fixed submission:
def gridbfs(grid,sy,sx):
    INF = 10**18

    gridy = len(grid)
    gridx = len(grid[0])

    dist = [[INF]*gridx for _ in range(gridy)]
    dist[sy][sx] = 0
    q = [(sy,sx)]
    d = 1

    while q:
        qq = []
        for y,x in q:
            for dy,dx in [(-1,0),(1,0),(0,-1),(0,1)]:
                yy,xx = y+dy, x+dx
                if not (0 <= yy < gridy and 0 <= xx < gridx):
                    continue
                if grid[yy][xx] == '#':
                    continue
                if dist[yy][xx] != INF:
                    continue
                dist[yy][xx] = d
                qq.append((yy,xx))
        q = qq
        d += 1

    return dist

H,W = map(int,input().split())
grid = [input() for i in range(H)]
d = gridbfs(grid,0,0)
b = 0
for h in range(H):
    for w in range(W):
        if grid[h][w] == '#':
            b += 1

print(max(H*W-b-d[H-1][W-1]-1,-1))
Buggy python submission (verdict: Time Limit Exceeded):
import collections
N,K=map(int,input().split())
li=list(map(int,input().split()))
li_count=collections.Counter(li)
change=0
S=max(len(li_count)-K,0)
for s in range(S):
    change+=li_count.most_common()[-1-s][1]
print(change)


Fixed submission:
import collections
N,K=map(int,input().split())
li=list(map(int,input().split()))
li_count=collections.Counter(li)
li_count_most=li_count.most_common()[::-1]
change=0
S=max(len(li_count)-K,0)
for s in range(S):
    change+=li_count_most[s][1]
print(change)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
N,K=map(int,input().split())
li=list(map(int,input().split()))
li_count=collections.Counter(li)
not_change=0
S=min(K,len(li_count))
for k in range(S):
    not_change+=li_count.most_common()[k][1]
print(N-not_change)


Fixed submission:
import collections
N,K=map(int,input().split())
li=list(map(int,input().split()))
li_count=collections.Counter(li)
li_count_most=li_count.most_common()[::-1]
change=0
S=max(len(li_count)-K,0)
for s in range(S):
    change+=li_count_most[s][1]
print(change)
Buggy python submission (verdict: Time Limit Exceeded):
N,C = map(int,input().split())
T = [[0 for j in range(C)] for i in range(10**5+1)]

for _ in range(N):
    s,t,c = map(int,input().split())
    T[s][c-1] += 1
    T[t][c-1] -= 1
for i in range(10**5):
    for j in range(C):
        T[i+1][j] += T[i][j]

ans = 0
for i in range(10**5):
    a = 0
    for j in range(C):
        if T[i][j] or T[i+1][j]:
            a += 1
    ans = max(ans,a)
print(ans)

Fixed submission:
N,C = map(int,input().split())
T = [[0 for i in range(10**5+1)] for j in range(30)]

for i in range(N):
    s,t,c = map(int,input().split())
    T[c-1][s] += 1
    T[c-1][t] -= 1
for i in range(C):
    for j in range(10**5):
        T[i][j+1] += T[i][j]

for i in range(C):
    for j in range(10**5):
        if T[i][-j-1] == 0 and T[i][-j-2] == 1:
            T[i][-j-1] = 1
ans = 0
for i in range(10**5+1):
    ans = max(ans,sum(T[j][i] for j in range(C)))
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N,C = map(int,input().split())
T = [[0 for i in range(10**5+1)] for j in range(30)]

for i in range(N):
    s,t,c = map(int,input().split())
    T[c-1][s] += 1
    T[c-1][t] -= 1
for i in range(C):
    for j in range(10**5):
        T[i][j+1] += T[i][j]

for i in range(C):
    for j in range(10**5):
        if T[i][-j-1] == 0 and T[i][-j-2] == 1:
            T[i][-j-1] = 1
ans = 0
for i in range(10**5+1):
    ans = max(ans,sum(T[j][i] for j in range(C)))
print(ans)

Fixed submission:
N,C = map(int,input().split())
T = [[0 for i in range(10**5+1)] for j in range(30)]

for i in range(N):
    s,t,c = map(int,input().split())
    T[c-1][s] += 1
    T[c-1][t] -= 1
for i in range(C):
    for j in range(10**5):
        T[i][j+1] += T[i][j]

for i in range(C):
    for j in range(10**5):
        if T[i][-j-1] == 0 and T[i][-j-2] == 1:
            T[i][-j-1] = 1
ans = 0
for i in range(10**5+1):
    ans = max(ans,sum(T[j][i] for j in range(C)))
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import itertools

H,W = map(int,input().split())
cost = [list(map(int,input().split())) for _ in range(10)]
A = [list(map(int,input().split())) for _ in range(H)]


to1 = [10**3 for i in range(10)]

nlist = [0] + [i for i in range(2,10)]

for i in range(1,10):
    for v in itertools.permutations(nlist,i):
        c = 0
        for j in range(i-1):
            c += cost[v[j]][v[j+1]]
        c += cost[v[i-1]][1]
        to1[v[0]] = min(to1[v[0]], c)

ans = 0
for h in range(H):
    for w in range(W):
        if A[h][w] != 1 and A[h][w] != -1:
            ans += to1[A[h][w]]

print(ans)

        


Fixed submission:
import itertools

H,W = map(int,input().split())
cost = [list(map(int,input().split())) for _ in range(10)]
A = [list(map(int,input().split())) for _ in range(H)]


to1 = [10**3 for i in range(10)]

nlist = [0] + [i for i in range(2,10)]

for i in range(1,10):
    for v in itertools.permutations(nlist,i):
        c = 0
        for j in range(i-1):
            c += cost[v[j]][v[j+1]]
        c += cost[v[i-1]][1]
        to1[v[0]] = min(to1[v[0]], c)

ans = 0
for h in range(H):
    for w in range(W):
        if A[h][w] != 1 and A[h][w] != -1:
            ans += to1[A[h][w]]

print(ans)
Buggy python submission (verdict: Runtime Error):
S = input()
N = len(S)
ans = []
check = []
for i in range(N):
    if S[i] != 'x':
        ans.append(S[i])
        check.append(i)
if ans != ans[::-1]:
    print(-1)
    exit()
if len(ans)%2:
    cl,cr = check[len(ans)//2],check[len(ans)//2]
else:
    cl,cr = check[len(ans)//2-1],check[len(ans)//2]
cnt = 0
while 0 <= cl and cr <= N-1:
    if S[cl] == S[cr]:
        cl -= 1
        cr += 1
    elif S[cl] == 'x':
        cnt += 1
        cl -= 1
    else:
        cnt += 1
        cr += 1
cnt += max(cl+1,N-cr)
print(cnt)


Fixed submission:
S = input()
N = len(S)
ans = []
check = []
for i in range(N):
    if S[i] != 'x':
        ans.append(S[i])
        check.append(i)
if len(ans) == 0:
    print(0)
    exit()
if ans != ans[::-1]:
    print(-1)
    exit()
if len(ans)%2:
    cl,cr = check[len(ans)//2],check[len(ans)//2]
else:
    cl,cr = check[len(ans)//2-1],check[len(ans)//2]
cnt = 0
while 0 <= cl and cr <= N-1:
    if S[cl] == S[cr]:
        cl -= 1
        cr += 1
    elif S[cl] == 'x':
        cnt += 1
        cl -= 1
    else:
        cnt += 1
        cr += 1
cnt += max(cl+1,N-cr)
print(cnt)
Buggy python submission (verdict: Time Limit Exceeded):
import sys
readline = sys.stdin.readline
sys.setrecursionlimit(10**8)
mod = 10**9+7
#mod = 998244353
INF = 10**20
eps = 10**-7

N,K = map(int,readline().split())

P = [tuple(map(int,readline().split())) for i in range(N)]

X = []
Y = []
for (xi,yi) in P:
    X.append(xi)
    Y.append(yi)
X.sort()
Y.sort()
from itertools import combinations

ans = INF
def count(xmin,xmax,ymin,ymax):
    ret = 0
    for (xi,yi) in P:
        if (xmin <= xi <= xmax) and (ymin <= yi <= ymax):
            ret += 1
    return ret

for (xmin,xmax) in combinations(X,2):
    for (ymin,ymax) in combinations(Y,2):
        if count(xmin,xmax,ymin,ymax) >= K:
            ans = min(ans,(xmax-xmin)*(ymax-ymin))
print(ans)



Fixed submission:
import sys
readline = sys.stdin.readline
sys.setrecursionlimit(10**8)
mod = 10**9+7
#mod = 998244353
INF = 10**20
eps = 10**-7

N,K = map(int,readline().split())

P = [tuple(map(int,readline().split())) for i in range(N)]

X = []
Y = []
for (xi,yi) in P:
    X.append(xi)
    Y.append(yi)
X.sort()
Y.sort()
from itertools import combinations

ans = INF
def count(xmin,xmax,ymin,ymax):
    ret = 0
    for (xi,yi) in P:
        if (xmin <= xi <= xmax) and (ymin <= yi <= ymax):
            ret += 1
    return ret

for (xmin,xmax) in combinations(X,2):
    for (ymin,ymax) in combinations(Y,2):
        if count(xmin,xmax,ymin,ymax) >= K:
            ans = min(ans,(xmax-xmin)*(ymax-ymin))
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N,M,R = map(int,input().split())
r = list(map(int,input().split()))
INF = 10**18
d = [[INF for i in range(N)] for j in range(N)]
for i in range(M):
    a,b,c = map(int,input().split())
    d[a-1][b-1] = c
    d[b-1][a-1] = c

for i in range(N):
    d[i][i] = 0

# ワーシャルフロイド
for k in range(N):
    for i in range(N):
        for j in range(N):
            d[i][j] = min(d[i][j], d[i][k] + d[k][j])

import itertools
ans = INF
for v in itertools.permutations(r,R):
    anss = 0
    for i in range(R-1):
        anss += d[v[i]-1][v[i+1]-1]
    ans = min(ans,anss)
print(ans)

Fixed submission:
n,m,R = map(int,input().split())
r = list(map(int,input().split()))
INF = 10**10
d = [[INF for i in range(n)] for j in range(n)]

for i in range(m):
    a,b,c = map(int,input().split())
    d[a-1][b-1] = c
    d[b-1][a-1] = c

for k in range(n):
    for i in range(n):
        for j in range(n):
            d[i][j] = min(d[i][j],d[i][k]+d[k][j])

from itertools import permutations

ans = INF
for v in permutations(r,R):
    dis = 0
    for i in range(R-1):
        dis += d[v[i]-1][v[i+1]-1]
    ans = min(ans,dis)

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n,m,R = map(int,input().split())
r = list(map(int,input().split()))
INF = 10**10
d = [[INF for i in range(n)] for j in range(n)]

for i in range(m):
    a,b,c = map(int,input().split())
    d[a-1][b-1] = c
    d[b-1][a-1] = c

for k in range(n):
    for i in range(n):
        for j in range(n):
            d[i][j] = min(d[i][j],d[i][k]+d[k][j])

from itertools import permutations

ans = INF
for v in permutations(r,R):
    dis = 0
    for i in range(R-1):
        dis += d[v[i]-1][v[i+1]-1]
    ans = min(ans,dis)

print(ans)


Fixed submission:
n,m,R = map(int,input().split())
r = list(map(int,input().split()))
INF = 10**10
d = [[INF for i in range(n)] for j in range(n)]

for i in range(m):
    a,b,c = map(int,input().split())
    d[a-1][b-1] = c
    d[b-1][a-1] = c

for k in range(n):
    for i in range(n):
        for j in range(n):
            d[i][j] = min(d[i][j],d[i][k]+d[k][j])

from itertools import permutations

ans = INF
for v in permutations(r,R):
    dis = 0
    for i in range(R-1):
        dis += d[v[i]-1][v[i+1]-1]
    ans = min(ans,dis)

print(ans)
Buggy python submission (verdict: Runtime Error):
s=list(input())

print(s[0]+str(len(s-2))+s[len(s)-1])

Fixed submission:
s=list(input())

print(s[0]+str(len(s)-2)+s[len(s)-1])
Buggy python submission (verdict: Time Limit Exceeded):
N,M=map(int,input().split())
first=[]
second=[]
for m in range(M):
    a,b=map(int,input().split())
    if a==1:
        first.append(b)
    elif b==N:
        second.append(a)
count=0
for n in first:
    if n in second:
        print('POSSIBLE')
        count=1
        break
if count==0:
    print('IMPOSSIBLE')


Fixed submission:
N,M=map(int,input().split())
first=[]
second=[]
for m in range(M):
    a,b=map(int,input().split())
    if a==1:
        first.append(b)
    elif b==N:
        second.append(a)
first_and_second=set(first)&set(second)
if len(first_and_second)==0:
    print('IMPOSSIBLE')
else:
    print('POSSIBLE')

Buggy python submission (verdict: Time Limit Exceeded):
N,M=map(int,input().split())
first=[]
second=[]
for m in range(M):
    a,b=map(int,input().split())
    if a==1:
        first.append(b)
    elif b==N:
        second.append(a)
count=0
for n in first:
    if n in second:
        print('POSSIBLE')
        count=1
        break
if count==0:
    print('IMPOSSIBLE')


Fixed submission:
N,M=map(int,input().split())
first=[]
second=[]
for m in range(M):
    a,b=map(int,input().split())
    if a==1:
        first.append(b)
    elif b==N:
        second.append(a)
first_and_second=set(first)&set(second)
if len(first_and_second)==0:
    print('IMPOSSIBLE')
else:
    print('POSSIBLE')
Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
li=list(map(int,input().split()))
ans=[]
if N%2==0:
    for n in range(N):
        if n%2==0:
            ans.append(str(li[n]))
        else:
            ans.insert(0,str(li[n]))
else:
    for n in range(N):
        if n%2==0:
            ans.insert(0,str(li[n]))
        else:
            ans.append(str(li[n]))
print(' '.join(ans))



Fixed submission:
N=int(input())
li=list(map(int,input().split()))
ans_odd=[]
ans_even=[]
if N%2==0:
    ans_normal=li[::2]
    ans_rev=li[1::2]
else:
    ans_rev=li[::2]
    ans_normal=li[1::2]  
ans_rev.reverse()
ans=ans_rev+ans_normal
for n in range(N):
    ans[n]=str(ans[n])
print(' '.join(ans))

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
li=list(map(int,input().split()))
ans=[]
if N%2==0:
    for n in range(N):
        if n%2==0:
            ans.append(str(li[n]))
        else:
            ans.insert(0,str(li[n]))
else:
    for n in range(N):
        if n%2==0:
            ans.insert(0,str(li[n]))
        else:
            ans.append(str(li[n]))
print(' '.join(ans))



Fixed submission:
N=int(input())
li=list(map(int,input().split()))
ans_odd=[]
ans_even=[]
if N%2==0:
    ans_normal=li[::2]
    ans_rev=li[1::2]
else:
    ans_rev=li[::2]
    ans_normal=li[1::2]  
ans_rev.reverse()
ans=ans_rev+ans_normal
for n in range(N):
    ans[n]=str(ans[n])
print(' '.join(ans))

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
li=list(map(int,input().split()))
ans=[]
for n in range(N):
    a=str(li[n])
    ans.append(a)
    ans.reverse()
print(' '.join(ans))


Fixed submission:
N=int(input())
li=list(map(int,input().split()))
ans_odd=[]
ans_even=[]
if N%2==0:
    ans_normal=li[::2]
    ans_rev=li[1::2]
else:
    ans_rev=li[::2]
    ans_normal=li[1::2]  
ans_rev.reverse()
ans=ans_rev+ans_normal
for n in range(N):
    ans[n]=str(ans[n])
print(' '.join(ans))
Buggy python submission (verdict: Runtime Error):
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

s=0
count=0

while s!=1:
  if count==N:
    break
  else:
    check.append(s)
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)

Fixed submission:
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

s=0
count=0

while s!=1:
  if count==N:
    break
  else:
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

check=[]
s=0
count=0

while s!=1:
  if s in check:
    break
  else:
    check.append(s)
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)

Fixed submission:
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

s=0
count=0

while s!=1:
  if count==N:
    break
  else:
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)

Buggy python submission (verdict: Time Limit Exceeded):
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

check=[]
s=0
count=0

while s!=1:
  if s in check:
    break
  else:
    check.append(s)
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)

Fixed submission:
N=int(input())
li=[]

for n in range(N):
  a=int(input())
  li.append(a)

s=0
count=0

while s!=1:
  if count==N:
    break
  else:
    s=li[s]-1
    count+=1

if s==1:
  print(count)
else:
  print(-1)