Harryxun/sft_time huggingface dataset:
### BUGGY CODE ###

import sys
sys.setrecursionlimit(10000)

def nat_sum(n):
  if n==0:
    pass
  else:
    k = 0
    for i in range(n):
      if i*(i+1)//2 < n <= (i+1)*(i+2)//2:
        k = i+1
        break
    print(k)
    nat_sum(n-k)
    
n = int(input())
nat_sum(n)


### FIXED CODE ###

import sys
sys.setrecursionlimit(10000)

def nat_sum(n):
  if n==0:
    pass
  else:
    k = 0
    for i in range(n):
      if i*(i+1)//2 < n <= (i+1)*(i+2)//2:
        k = i+1
        break
    print(k)
    nat_sum(n-k)
    
n = int(input())
nat_sum(n)
### BUGGY CODE ###

M=998244353
N,*A=open(0)
d=[1]+[0]*7**6
e=[1]+[0]*7**6
z=1
s=0
for a in A:
	a=int(a);s+=a;i=s;z*=3
	while~i:d[i]+=d[i]+d[i-a]%M;e[i]+=e[i-a];i-=1
i=s
while i*2>=s:z-=d[i]*3;i-=1
print((z+~s%2*e[s//2]*3)%M)

### FIXED CODE ###

M,z,s=998244353,1,0
N,*A=map(int,open(0))
d=[1]+[0]*7**6
e=[1]+[0]*7**6
for a in A:
 i=s;s+=a;z*=3
 while~i:d[i+a]+=d[i]%M;d[i]*=2;e[i+a]+=e[i]%M;i-=1
i=s
while i*2>=s:z=(z-d[i]*3)%M;i-=1
print((z+~s%2*e[s//2]*3)%M)
### BUGGY CODE ###

def main():
    n, w = map(int, input().split())
    wv = [list(map(int, input().split())) for _ in range(n)]
    dp = [[None]*(w+1) for _ in range(n+1)]
    dp[0] = [0]*(w+1)
    for i in range(1, n+1):
        wi, vi = wv[i-1]
        di = dp[i]
        dio = dp[i-1]
        for j in range(wi):
            di[j] = dio[j]
        for j in range(wi, w+1):
            di[j] = max(dio[j], dio[j-wi]+vi)
    print(dp[-1][-1])

if __name__ == "__main__":
    main()

### FIXED CODE ###

def main():
    n, w = map(int, input().split())
    wv = [list(map(int, input().split())) for _ in range(n)]
    dp = [[None]*(w+1) for _ in range(n+1)]
    dp[0] = [0]*(w+1)
    for i in range(1, n+1):
        wi, vi = wv[i-1]
        di = dp[i]
        dio = dp[i-1]
        for j in range(wi):
            di[j] = dio[j]
        for j in range(wi, w+1):
            di[j] = max(dio[j], dio[j-wi]+vi)
    print(dp[-1][-1])

if __name__ == "__main__":
    main()
### BUGGY CODE ###

#!/usr/bin/env python3

from itertools import permutations

HUGE = 10 ** 18

def main():
    n, m, r = map(int, input().split())
    togo = list(map(int, input().split()))
    adj_mat = [[HUGE for j in range(n)] for i in range(n)]
    for i in range(n):
        adj_mat[i][i] = HUGE
    for i in range(m):
        a, b, c = map(int, input().split())
        a0 = a - 1
        b0 = b - 1
        adj_mat[a0][b0] = c
        adj_mat[b0][a0] = c

    # Warshall-Floyd
    for k in range(n):
        for i in range(n):
            for j in range(n):
                adj_mat[i][j] = min(adj_mat[i][j], adj_mat[i][k] + adj_mat[k][j])

    res = HUGE
    for way in permutations(togo):
        assert len(way) > 1
        x = 0
        for i in range(len(way) - 1):
            x += adj_mat[way[i] - 1][way[i + 1] - 1]
        res = min(res, x)

    print(res)

if __name__ == "__main__":
    main()


### FIXED CODE ###

#!/usr/bin/env python3

from itertools import permutations
import numpy as np

HUGE = 10 ** 18

def main():
    n, m, r = map(int, input().split())
    togo = list(map(int, input().split()))
    adj_mat = [[HUGE for j in range(n)] for i in range(n)]
    for i in range(n):
        adj_mat[i][i] = HUGE
    for i in range(m):
        a, b, c = map(int, input().split())
        a0 = a - 1
        b0 = b - 1
        adj_mat[a0][b0] = c
        adj_mat[b0][a0] = c
    adj_mat = np.array(adj_mat)

    wf(adj_mat, n)

    res = HUGE
    for way in permutations(togo):
        assert len(way) > 1
        x = 0
        for i in range(len(way) - 1):
            x += adj_mat[way[i] - 1][way[i + 1] - 1]
        res = min(res, x)

    print(res)

def wf(adj_mat, n):
    for k in range(n):
        for i in range(n):
            adj_mat[i, :] = np.minimum(adj_mat[i, :], adj_mat[i][k] + adj_mat[k, :])

if __name__ == "__main__":
    main()
### BUGGY CODE ###

from collections import Counter

N=int(input())
l=[]
v=[]

ans=0

for i in range(N):
    si=input()
    # ci=Counter(si)
    # c=sorted(ci.elements())
    # c=sorted(Counter(si).elements())
    sorted_s=''.join(sorted(Counter(si).elements()))
    if sorted_s in l:
        ans+=v[l.index(sorted_s)]
        v[l.index(sorted_s)]+=1
    else:
        l.append(sorted_s)
        v.append(1)

print(ans)

### FIXED CODE ###

from collections import Counter

N=int(input())
dic={}

ans=0

for i in range(N):
    si=input()
    # ci=Counter(si)
    # c=sorted(ci.elements())
    # c=sorted(Counter(si).elements())
    sorted_s=''.join(sorted(Counter(si).elements()))
    if sorted_s in dic:
        ans+=dic[sorted_s]
        dic[sorted_s]+=1
    else:
        dic[sorted_s]=1
print(ans)
### BUGGY CODE ###

import sys
input = sys.stdin.readline

n = int(input())
h = [int(i) for i in input().split()]
a = [int(i) for i in input().split()]


sellogn = []
seln = 0
selfunc = max
selone = 0
selb = []


def __init__(a, func=max, one=-10 ** 18):
    global sellogn, seln, selfunc, selone, selb
    sellogn = (len(a) - 1).bit_length()
    seln = 1 << sellogn
    selfunc = func
    selone = one

    selb = [selone] * (2 * seln - 1)
    for i, j in enumerate(a):
        selb[i + seln - 1] = j
    for i in reversed(range(seln - 1)):
        selb[i] = selfunc(selb[i * 2 + 1], selb[i * 2 + 2])


def get_item(i):
    global sellogn, seln, selfunc, selone, selb
    return selb[i + seln - 1]


def update(index, x):
    global sellogn, seln, selfunc, selone, selb
    i = index + seln - 1
    selb[i] = x
    while i != 0:
        i = (i - 1) // 2
        selb[i] = selfunc(selb[i * 2 + 1], selb[i * 2 + 2])


def update_func(index, x):
    global sellogn, seln, selfunc, selone, selb
    i = index + seln - 1
    selb[i] = selfunc(selb[i], x)
    while i != 0:
        i = (i - 1) // 2
        selb[i] = selfunc(selb[i * 2 + 1], selb[i * 2 + 2])


def get_segment(l, r):
    global sellogn, seln, selfunc, selone, selb
    l += seln
    r += seln
    s = selone
    t = selone
    while l < r:
        if l & 1:
            s = selfunc(s, selb[l - 1])
            l += 1
        if r & 1:
            r -= 1
            t = selfunc(selb[r - 1], t)
        l >>= 1
        r >>= 1
    return selfunc(s, t)


__init__([0]*(n+1))

for i in range(n):
    j = get_segment(0, h[i] + 1)
    update_func(h[i], j + a[i])
print(get_segment(0, n+1))


### FIXED CODE ###

n = int(input())
h = [int(i) for i in input().split()]
a = [int(i) for i in input().split()]


class Bucket:
    def __init__(self, a, k, func=max, one=-10**18):
        self.n = len(a)
        self.k = k
        self.func = func
        self.one = one

        self.a = a[:]
        self.b = []
        for i in range(self.n // self.k):
            s = self.one
            for j in range(i * self.k, i * self.k + self.k):
                s = func(s, self.a[j])
            self.b.append(s)
        s = self.one
        for i in range(self.n // self.k * self.k, self.n):
            s = self.func(s, self.a[i])
        self.b.append(s)

    def get(self, index):
        s = self.one
        j = index // self.k
        for i in range(j):
            s = self.func(s, self.b[i])
        for i in range(j * self.k, index + 1):
            s = self.func(s, self.a[i])
        return s

    def update(self, index, x):
        self.a[index] = self.func(x, self.a[index])
        self.b[index//self.k] = self.func(self.b[index//self.k], x)


buc = Bucket([0] * (n+1), max(10, int(n**0.5)))

for i in range(n):
    j = buc.get(h[i])
    buc.update(h[i], j + a[i])

print(buc.get(n))
### BUGGY CODE ###

from collections import *
h,w=map(int,input().split())
a=[input() for _ in range(h)]
b=[[h*w]*w for _ in range(h)]
b[0][0]=1
d=deque([[0,0]])
while d:
    y,x=d.pop()
    for i,j in([1,0],[-1,0],[0,1],[0,-1]):
        t,u=y+i,x+j
        if h>t>=0<=u<w:
            if a[t][u]=="." and b[t][u]>b[y][x]+1:
                d.append([t,u])
                b[t][u]=b[y][x]+1
print(max(-1,sum([i.count(".") for i in a])-b[-1][-1]))

### FIXED CODE ###

from collections import *
h,w=map(int,input().split())
a=[input() for _ in range(h)]
b=[[h*w]*w for _ in range(h)]
b[0][0]=1
d=deque([[0,0]])
while d:
    y,x=d.pop()
    if y<h-1:
        if a[y+1][x]=="." and b[y+1][x]>b[y][x]+1:
            d.append([y+1,x])
            b[y+1][x]=b[y][x]+1
    if x<w-1:
        if a[y][x+1]=="." and b[y][x+1]>b[y][x]+1:
            d.append([y,x+1])
            b[y][x+1]=b[y][x]+1
    if y>0:
        if a[y-1][x]=="." and b[y-1][x]>b[y][x]+1:
            d.append([y-1,x])
            b[y-1][x]=b[y][x]+1
    if x>0:
        if a[y][x-1]=="." and b[y][x-1]>b[y][x]+1:
            d.append([y,x-1])
            b[y][x-1]=b[y][x]+1
c=sum([i.count(".") for i in a])
print(max(-1,c-b[-1][-1]))
### BUGGY CODE ###

l = []
for _ in range(int(input())):
  a = input().split()
  if "insert" in a: l.insert(0, int(a[1]))
  elif "deleteFirst" in a: l.pop(0)
  elif "deleteLast" in a: l.pop()
  else:
    if int(a[1]) in l: l.remove(int(a[1]))
print(*l)


### FIXED CODE ###

from collections import deque
d = deque()
for _ in range(int(input())):
  a = input()
  if "i" == a[0]: d.appendleft(int(a[7:]))
  elif "F" == a[6]: d.popleft()
  elif "L" == a[6]: d.pop()
  else:
    try: d.remove(int(a[7:]))
    except: pass
print(*d)
### BUGGY CODE ###

from collections import deque

n,x,y=map(int,input().split())
map=[[] for _ in range(n+1)]
for i in range(1,n):
    map[i].append(i+1)
    map[i+1].append(i)
map[x].append(y)
map[y].append(x)

ans=[0]*n

for j in range(1,n+1):
    dict=[-1]*(n+1)
    que=deque()
    que.append(j)
    dict[j]=0
    while que:
        t=que.popleft()
        for k in map[t]:
            if dict[k]==-1:
                dict[k]=dict[t]+1
                que.append(k)
    for l in range(1,n+1):
        ans[dict[l]]+=1
for m in range(1,n):
    print(ans[m]//2)

### FIXED CODE ###

from collections import deque

n,x,y=map(int,input().split())
map=[[] for _ in range(n+1)]
for i in range(1,n):
    map[i].append(i+1)
    map[i+1].append(i)
map[x].append(y)
map[y].append(x)

ans=[0]*n

for j in range(1,n+1):
    dict=[-1]*(n+1)
    que=deque()
    que.append(j)
    dict[j]=0
    while que:
        t=que.popleft()
        for k in map[t]:
            if dict[k]==-1:
                dict[k]=dict[t]+1
                que.append(k)
    for l in range(1,n+1):
        ans[dict[l]]+=1
for m in range(1,n):
    print(ans[m]//2)
### BUGGY CODE ###

# use faster method than input()
import sys
sys.setrecursionlimit(10**9)
input = sys.stdin.readline


def manhattan(pos1, pos2):
    return abs(pos1[0]-pos2[0]) + abs(pos2[1]-pos1[1])


H, W, D = map(int, input().split())
A = [(0, 0)]*(H*W)
for r in range(H):
    l = list(map(int, input().split()))
    for c in range(W):
        A[l[c]-1] = (r, c)

dist = [0]*(H*W)
for i in range(H*W-D):
    dist[i] = manhattan(A[i], A[i+D])


Q = int(input())
L = []

ans_list = [0]*Q
for i in range(Q):
    ans = 0
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    while a+D <= b:
        ans += dist[a]
        a += D
    ans_list[i] = ans

for ans in ans_list:
    print(ans)


### FIXED CODE ###

# use faster method than input()
import sys
sys.setrecursionlimit(10**9)
input = sys.stdin.readline


def manhattan(pos1, pos2):
    return abs(pos1[0]-pos2[0]) + abs(pos2[1]-pos1[1])


H, W, D = map(int, input().split())
A = [(0, 0)]*(H*W)
for r in range(H):
    l = list(map(int, input().split()))
    for c in range(W):
        A[l[c]-1] = (r, c)

dist = [0]*(H*W)
for i in range(D, H*W):
    dist[i] = dist[i-D]+manhattan(A[i], A[i-D])


Q = int(input())
L = []

ans_list = [0]*Q
for i in range(Q):
    ans = 0
    a, b = map(int, input().split())
    a -= 1
    b -= 1
    ans = dist[b]-dist[a]
    ans_list[i] = ans

for ans in ans_list:
    print(ans)
### BUGGY CODE ###

import sys
sys.setrecursionlimit(10**6)

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

graph = [set() for _ in range(n + 1)]

for i in range(n - 1):
    a, b = map(int, input().split())
    graph[a].add(b)
    graph[b].add(a)

arr = [0] * (n + 1)

for i in range(q):
    p, x = map(int, input().split())
    arr[p] += x


def solve(graph, arr):
    curr, root = 1, -1
    visited = [0] * (n + 1)

    def dfs(curr, root):
        stack = graph[curr]

        while stack:
            leaf = stack.pop()
            if leaf == root:
                continue
            arr[leaf] += arr[curr]
            dfs(leaf, curr)

        return arr

    return dfs(curr, root)


ans = solve(graph, arr)

print(*ans[1:])

### FIXED CODE ###

from collections import defaultdict
import sys
sys.setrecursionlimit(10**6)

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

graph = defaultdict(set)

for i in range(n - 1):
    a, b = map(int, input().split())
    graph[a].add(b)
    graph[b].add(a)

arr = [0] * (n + 1)

for i in range(q):
    p, x = map(int, input().split())
    arr[p] += x


def solve():
    stack = [1]
    visited = [True] * 2 + [False] * (n - 1)

    while stack:
        curr = stack.pop()
        for leaf in graph[curr]:
            if visited[leaf]:
                continue
            stack.append(leaf)
            visited[leaf] = True
            arr[leaf] += arr[curr]

    return arr


arr = solve()

print(*arr[1:])
### BUGGY CODE ###

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import argparse
import numpy as np

parser = argparse.ArgumentParser(description='Range Product')
parser.add_argument('a', type=int)
parser.add_argument('b', type=int)
args = parser.parse_args()

a = args.a
b = args.b

if a > 0 and b > 0:
    print 'Positive'
elif a < 0 and b < 0:
    if (b - a) % 2 == 0:
        print 'Negative'
    else:
        print 'Positive'
else:
    print 'Zero'

### FIXED CODE ###

input = raw_input()
a, b = input.split()
a = int(a)
b = int(b)
if a > 0 and b > 0:
    print 'Positive'
elif a < 0 and b < 0:
    if (b - a) % 2 == 0:
        print 'Negative'
    else:
        print 'Positive'
else:
    print 'Zero'
### BUGGY CODE ###

N,M =  map( int ,input().split())
H_list = list(map( int , input().split()))
link_list = [[0] * N for i in range(N)]
A_B_list = [[0] * 2  for i in range(M)]
J_list = [0]*N
for i in range(M):
    A,B = map( int ,input().split())
    A_B_list[i][0] = A
    A_B_list[i][1] = B
for k in range(M):
    link_list[A_B_list[k][0]-1][A_B_list[k][1]-1] = 1
    link_list[A_B_list[k][1]-1][A_B_list[k][0]-1] = 1
for l in range(N):
    for m in range(N):
        if link_list[l][m] >=1:
            if H_list[l] > H_list[m]:
                J_list[m] = -1
                if J_list[l] != -1:
                    J_list[l] = 1
    if link_list[l].count(0) == N:
        J_list[l] = 1 
print(J_list.count(1))
                

### FIXED CODE ###


N,M =  map( int ,input().split())
H_list = list(map( int , input().split()))
A_B_list = [[0] * 2  for i in range(M)]
bad_list = []
J_list = []
for i in range(M):
    A,B = map( int ,input().split())
    A_B_list[i][0] = A
    A_B_list[i][1] = B
for j in range(M):
    if H_list[A_B_list[j][0]-1] > H_list[A_B_list[j][1]-1]:
        bad_list.append(A_B_list[j][1])
    elif H_list[A_B_list[j][0]-1] < H_list[A_B_list[j][1]-1]:
        bad_list.append(A_B_list[j][0])
    else:
        bad_list.append(A_B_list[j][0])
        bad_list.append(A_B_list[j][1])
J_list = list(set(bad_list))
print(N-len(J_list))
### BUGGY CODE ###

import numpy as np
n, ma, mb = map(int, input().split())

item = [tuple(map(int, input().split())) for _ in range(n)]

INF = 5000
dp = np.full((n + 1, 444, 444), INF, dtype=np.int)

dp[0][0][0] = 0

for i in range(n):
    for j in range(401):
        for k in range(401):
            a, b, c = item[i]
            dp[i + 1][j + a][k + b] = min(dp[i + 1]
                                          [j + a][k + b], dp[i][j][k] + c)
            dp[i + 1][j][k] = min(dp[i + 1][j][k], dp[i][j][k])

ans = INF
for i in range(1, 401):
    for j in range(1, 401):  # i : j == ma : mb
        if ma * j == i * mb:
            ans = min(ans, dp[n][i][j])
print(ans if ans != INF else -1)


### FIXED CODE ###

n, ma, mb = map(int, input().split())

item = [tuple(map(int, input().split())) for _ in range(n)]

INF = 5000
dp = [[INF] * 444 for _ in range(444)]


dp[0][0] = 0

for i in range(n):
    next = [[INF] * 444 for _ in range(444)]
    for j in range(401):
        for k in range(401):
            a, b, c = item[i]
            next[j + a][k + b] = min(next
                                     [j + a][k + b], dp[j][k] + c)
            next[j][k] = min(next[j][k], dp[j][k])
    dp = next

ans = INF
for i in range(1, 401):
    for j in range(1, 401):  # i : j == ma : mb
        if ma * j == i * mb:
            ans = min(ans, dp[i][j])
print(ans if ans != INF else -1)
### BUGGY CODE ###

#!/usr/bin/env python3
import sys
sys.setrecursionlimit(10**8)
input = sys.stdin.readline

n = int(input())

MOD = 998244353
MAX_N = n 

fac = [1] + [0] * MAX_N
fac_inv = [1] + [0] * MAX_N
mod_pow2_n = [1] + [0] * MAX_N
f = 1
finv = 1
p2 = 1
for i in range(1, MAX_N+1):
    # fac[i] = fac[i-1] * i % MOD
    f *= i
    f %= MOD
    fac[i] = f
    # Fermat's little theorem says
    # a**(p-1) mod p == 1
    # then, a * a**(p-2) mod p == 1
    # it means a**(p-2) is inverse element
    # fac_inv[i] = fac_inv[i-1] * pow(i, MOD-2, MOD) % MOD
    finv *= pow(i, MOD-2, MOD)
    finv %= MOD
    fac_inv[i] = finv
    p2 *= 2
    p2 %= MOD
    mod_pow2_n[i] = p2

ans = 0
for i in range(n//2+1, n+1):
    ans += fac[n] * fac_inv[n-i] * fac_inv[i] * mod_pow2_n[n-i] % MOD
    ans %= MOD
print((pow(3, n, MOD) - ans * 2 + MOD)%MOD)

### FIXED CODE ###

#!/usr/bin/env python3
import sys
sys.setrecursionlimit(10**8)
input = sys.stdin.readline

MOD = 998244353
MAX_N = 10**7 

fac = [1] + [0] * MAX_N
fac_inv = [1] + [0] * MAX_N
mod_pow2_n = [1] + [0] * MAX_N
for i in range(1, MAX_N+1):
    fac[i] = fac[i-1] * i % MOD
    mod_pow2_n[i] = mod_pow2_n[i-1] * 2 % MOD

fac_inv[MAX_N] = pow(fac[MAX_N], MOD-2, MOD)
for i in range(MAX_N, 1, -1):
    fac_inv[i-1] = fac_inv[i] * i % MOD

def mod_nCr(n, r):
    if n < r or n < 0 or r < 0:
        return 0
    tmp = fac_inv[n-r] * fac_inv[r] % MOD
    return tmp * fac[n] % MOD 
    
n = int(input())
ans = 0
for i in range(n//2+1, n+1):
    ans += mod_nCr(n, i) * mod_pow2_n[n-i]
    ans %= MOD
print((pow(3, n, MOD) - ans * 2 + MOD)%MOD)
### BUGGY CODE ###

s = str(input())
t = str(input())

len_s = len(s)
len_t = len(t)

DP = [[0 for _ in range(len_t+1)] for _ in range(len_s+1)]

for i in range(len_s):
    for j in range(len_t):
        if s[i] == t[j]:
            DP[i+1][j+1] = max(DP[i][j]+1, DP[i+1][j+1])
        else:
            DP[i+1][j+1] = max(DP[i+1][j], DP[i+1][j+1])
            DP[i+1][j+1] = max(DP[i][j+1], DP[i+1][j+1])

i = len_s
j = len_t
ans = ''

while i > 0 and j > 0:
    if DP[i][j] == DP[i-1][j]:
        i -= 1
    elif DP[i][j] == DP[i][j-1]:
        j -= 1
    else:
        ans = s[i-1] + ans
        i -= 1
        j -= 1
print(ans)
 

### FIXED CODE ###

s = str(input())
t = str(input())

len_s = len(s)
len_t = len(t)

DP = [[0 for _ in range(len_t+1)] for _ in range(len_s+1)]

for i in range(len_s):
    for j in range(len_t):
        if s[i] == t[j]:
            DP[i+1][j+1] = max(DP[i][j]+1, DP[i+1][j+1])
        else:
            DP[i+1][j+1] = max(DP[i+1][j], DP[i+1][j+1])
            DP[i+1][j+1] = max(DP[i][j+1], DP[i+1][j+1])

i = len_s
j = len_t
ans = ''

while i > 0 and j > 0:
    if DP[i][j] == DP[i-1][j]:
        i -= 1
    elif DP[i][j] == DP[i][j-1]:
        j -= 1
    else:
        ans = s[i-1] + ans
        i -= 1
        j -= 1
print(ans)
### BUGGY CODE ###

import fractions

N = int(input())
a = [int(i) for i in input().split()]

ans = []
for i in range(N):
    dpL = []
    L = a[:i]
    if len(L)>=1:
        dpL.append(L[0])
        for j,left in enumerate(L):
            dpL.append(fractions.gcd(dpL[j],left))
#    print(dpL)
    
    dpR = []
    R = a[i+1:]
    if len(R)>=1:
        dpR.append(R[0])
        for j,right in enumerate(R):
            dpR.append(fractions.gcd(dpR[j],right))
   # print(dpR)
   
    if dpL == []:
        ans.append(min(dpR))
    elif dpR == []:
        ans.append(min(dpL))
    else:
        ans.append(fractions.gcd(dpL[len(dpL)-1],dpR[len(dpR)-1]))

print(max(ans))


### FIXED CODE ###

from fractions import gcd

N = int(input())
a = [int(i) for i in input().split()]

L = []
R = []
L.append(a[0])
R.append(a[-1])

for i in range(N-2):
    L.append(gcd(L[-1], a[i+1]))
    R.append(gcd(R[-1], a[-(i+2)]))

ans = max(L[-1], R[-1])
for i in range(N-2):
    tmp = gcd(L[i], R[-(i+2)])
    if tmp > ans:
        ans = tmp

print(ans)
### BUGGY CODE ###

import sys


def main():
    input = sys.stdin.readline
    n = int(input())
    nin_list = [int(input()) for _ in range(5)]
    area_list = [n, 0, 0, 0, 0, 0]
    time = 0
    while area_list[5] != n:
        for i in range(4, -1, -1):
            if area_list[i] == 0:
                continue
            move_nin = nin_list[i] if area_list[i] > nin_list[i] else area_list[i]
            area_list[i] -= move_nin
            area_list[i + 1] += move_nin
        time += 1
    print(time)


if __name__ == "__main__":
    main()

### FIXED CODE ###

import sys
import math


def main():
    input = sys.stdin.readline
    n = float(input())
    min_nin = min([int(input()) for _ in range(5)])
    print(int(4 + math.ceil(n / min_nin)))


if __name__ == "__main__":
    main()
### BUGGY CODE ###

from collections import deque

x, y, a, b, c = map(int, input().split())
p = [int(_) for _ in input().split()]
q = [int(_) for _ in input().split()]
r = [int(_) for _ in input().split()]

p.sort(reverse=True)
q.sort(reverse=True)
r.sort(reverse=True)

x_list = p[:x]
y_list = q[:y]

while (min(x_list[-1], y_list[-1]) < r[0]):
    if x_list[-1] > y_list[-1]:
        y_list.pop()
        y_list.append(r[0])
        y_list.sort(reverse=True)
        r.pop(0)
    else:
        x_list.pop()
        x_list.append(r[0])
        x_list.sort(reverse=True)
        r.pop(0)
    if len(r) == 0:
        break

print(sum(x_list) + sum(y_list))

### FIXED CODE ###

x, y, a, b, c = map(int, input().split())
p = [int(_) for _ in input().split()]
q = [int(_) for _ in input().split()]
r = [int(_) for _ in input().split()]
 
p.sort()
q.sort()
r.sort()
 
x_list = p[-x:]
y_list = q[-y:]
all_apple = x_list + y_list + r
all_apple.sort()
 
print(sum(all_apple[-(x+y):]))
### BUGGY CODE ###

import sys
if sys.version_info[0]>=3:raw_input=input

from scipy.sparse import*
g=[]
n=int(raw_input())
for _ in [0]*~-n:
	a,b=map(int,raw_input().split())
	g+=[[a-1,b-1,1]]
	g+=[[b-1,a-1,1]]
z=[-1]*n
for _ in [0]*int(input()):
	a,b=map(int,raw_input().split())
	g+=[[n,a-1,b]]
	z[a-1]=b
a,b,c=zip(*g)
a=map(int,csgraph.dijkstra(csr_matrix((c,(a,b)),[n+1]*2),1,n))
for i in range(n):
	if z[i]>=0 and z[i]!=a[i]:
		print('No')
		sys.exit()
	z[i]=a[i]
for e in g:
	if e[0]!=n and abs(z[e[0]]-z[e[1]])!=1:
		print('No')
		sys.exit()
print('Yes')
print("\n".join(map(str,a[:n])))

### FIXED CODE ###

#!/usr/bin/python
def shortestPath(g,s,dist,prev):
	n = len(g)-1
	Q=[]
	heapq.heappush(Q,(0,-2,s))
	while Q:
		e = heapq.heappop(Q)
		if prev[e[2]]!=-1: continue
		prev[e[2]] = e[1]
		for f in g[e[2]]:
			if dist[f[2]] > e[0] + f[0]:
				dist[f[2]] = e[0] + f[0]
				heapq.heappush(Q,(e[0]+f[0],f[1],f[2]))

import sys,heapq
#if sys.version_info[0]>=3:raw_input=input

n=int(raw_input())
g=[[] for _ in range(n+1)]
for _ in xrange(n-1):
	a,b=map(int,raw_input().split())
	g[a-1]+=[(1,a-1,b-1)]
	g[b-1]+=[(1,b-1,a-1)]
z=[-1]*n
for _ in xrange(int(raw_input())):
	a,b=map(int,raw_input().split())
	g[n]+=[(b,n,a-1)]
	z[a-1]=b
a=[1e9]*n+[0]
shortestPath(g,n,a,[-1]*(n+1))
for i in xrange(n):
	if z[i]>=0 and z[i]!=a[i]:
		print('No')
		sys.exit()
for _ in g:
	for e in _:
		if e[1]<e[2] and abs(a[e[1]]-a[e[2]])!=1:
			print('No')
			sys.exit()
print('Yes')
print("\n".join(map(str,a[:n])))
### BUGGY CODE ###

n=int(input())
count=0
for i in range(1,n):
    
    for t in range(1,n):
        if n-i*t>0:
            count +=1
        else:
            break
print(count)

### FIXED CODE ###

from sys import stdin
input=stdin.readline
n=int(input().rstrip())
count=0
for i in range(1,n):
    
    for t in range(1,n):
        if n-i*t>0:
            count +=1
        else:
            break
print(count)