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

from math import factorial as fact
import math
import sys
import itertools
import numpy as np
from collections import Counter
import datetime
from collections import deque


#入力:N(int:整数)
def input1():
	return int(input())

#入力:N,M(int:整数)
def input2():
	return map(int,input().split())

#入力:[n1,n2,...nk](int:整数配列)
def input_array():
	return list(map(int,input().split()))

def keta(N):
	return len(str(N))


def input_daytime(input_time):
	time,distance=input_time.split()
	t=time.split(":")
	se=str(t[-1]).split(".")
	dt1 = datetime.timedelta(hours=int(t[0]),minutes=int(t[1]),seconds=int(se[0]),milliseconds=int(se[1]))
	return dt1

def combinations(n,r):
	return list(itertools.combinations(range(n),r))



def all_sets(num_list):
	subsets=[]
	for i in range(2,len(num_list) + 1):
		for c in combinations(num_list, i):
			subsets.append(c) 
	return subsets

#公約数の列挙
def ch(x1):
	cf=[]
	for i in range(2,math.sqrt(x1)+1):
		if x1 % i==0:
			cf.append(i)
	return cf

def CountOneRoots(x,y):
	#x:縦，y:横
	return fact(x+y)/fact(x)/fact(y)

# 素因数分解
def prime_factorize(n):
    a = []
    while n % 2 == 0:
        a.append(2)
        n //= 2
    f = 3
    while f * f <= n:
        if n % f == 0:
            a.append(f)
            n //= f
        else:
            f += 2
    if n != 1:
        a.append(n)
    return a
	
def count_str(m):
	tmp={}
	for i in range(10):
		if i in tmp:
			tmp[i]=1
		else:
			tmp[i]+=1
	return tmp

def is_prime(n):
	if n==1: return True

	for i in range(2,int(math.sqrt(n))+1):
		if n%i==0:
			return False
	return True


n=input1()
A=input_array()
ans=1
flag=True
for a in A:
	ans=ans*a

if ans > 10**18:
	print(-1)
else:
	print(ans)




### FIXED CODE ###

import sys

#入力:N(int:整数)
def input1():
	return int(input())

#入力:N,M(int:整数)
def input2():
	return map(int,input().split())

#入力:[n1,n2,...nk](int:整数配列)
def input_array():
	return list(map(int,input().split()))
  
n=input1()
A=input_array()
if 0 in A:
	print(0)
	sys.exit()
ans=1

for a in A:
	ans=ans*a
	if ans > 10**18:
		break

if ans > 10**18:
	print(-1)
else:
	print(ans)
### BUGGY CODE ###

import sys
sys.setrecursionlimit(10000000)

f_inf = sys.maxsize

N, M, P = map(int, input().split())
ABC_d = {}
for m in range(M):
    A, B, C = map(int, input().split())
    if A in ABC_d:
        ABC_d[A].append([B, C - P])
    else:
        ABC_d[A] = [[B, C - P]]

cost = [-f_inf] * N
cost[0] = 0

def solve(pos, cnt):
    global cost

    if not(pos in ABC_d): return
    if cnt > N: cost[pos-1] = f_inf;

    for B, C in ABC_d[pos]:
        if cost[B - 1] == f_inf or cost[B - 1] >= cost[pos - 1] + C:
            pass
        elif cost[pos-1] == f_inf:
            cost[B-1] = f_inf
            solve(B, cnt + 1)
        elif cost[B - 1] < cost[pos - 1] + C:
            cost[B - 1] = cost[pos - 1] + C
            solve(B, cnt + 1)

solve(1, 1)

if (cost[-1] == sys.maxsize):
    print (-1)
else:
    print (max(0, int(cost[-1])))


### FIXED CODE ###

import sys
sys.setrecursionlimit(10000000)

f_inf = sys.maxsize

N, M, P = map(int, input().split())
ABC_d = {}
for m in range(M):
    A, B, C = map(int, input().split())
    if A in ABC_d:
        ABC_d[A].append([B, C - P])
    else:
        ABC_d[A] = [[B, C - P]]

cost = [-f_inf] * N
cost[0] = 0

def solve(pos, cnt):
    global cost

    if not(pos in ABC_d): return
    if cnt > N: cost[pos-1] = f_inf;

    for B, C in ABC_d[pos]:
        if cost[B - 1] == f_inf or cost[B - 1] >= cost[pos - 1] + C:
            pass
        elif cost[pos-1] == f_inf:
            cost[B-1] = f_inf
            solve(B, cnt + 1)
        elif cost[B - 1] < cost[pos - 1] + C:
            cost[B - 1] = cost[pos - 1] + C
            solve(B, cnt + 1)

solve(1, 1)

if (cost[-1] == sys.maxsize):
    print (-1)
else:
    print (max(0, int(cost[-1])))
### BUGGY CODE ###

import numpy as np

def next(A):
    t = len(A)
    L = np.zeros(t)
    for i in range(t):
        m = max(0,int(i-A[i]))
        M = min(t,int(i+A[i]+1))
        L[m:M] += np.ones(M-m)
    return L

N,K = [int(i) for i in input().split()]
A = np.array([int(i) for i in input().split()])

for _ in range(K):
    A = next(A)
A = [str(int(i)) for i in A]
print(" ".join(A))

### FIXED CODE ###

N,K = [int(i) for i in input().split()]
A = [int(i) for i in input().split()]

for _ in range(K):
    new = [0]*N
    for i in range(N):
        m = max(0,i-A[i])
        new[m] += 1
        if i+A[i]+1 < N:
            new[i+A[i]+1] -= 1
    A[0] = new[0]
    for i in range(1,N):
        new[i] += new[i-1]
        A[i] = new[i]
    for a in A:
        if a != N:
            break
    else:
        break

A = [str(i) for i in A]
print(" ".join(A))
### BUGGY CODE ###

N = int(input())
P = list(map(int, input().split(' ')))
print(sum(1 for i in range(N) if P[i] <= min(P[0:i+1])))


### FIXED CODE ###

N = int(input())
P = list(map(int, input().split(' ')))
cnt = 1
j = P[0]
for i in range(1, N):
    j = min(j, P[i])
    if P[i] <= j:
        cnt += 1
print(cnt)
### BUGGY CODE ###

#!/usr/bin/env pypy3
# N,M = map(int,sys.stdin.readline().split())
# a = tuple(map(int,sys.stdin.readline().split())) # single line with multi param
# a = tuple(int(sys.stdin.readline()) for _ in range(N)) # multi line with single param
# a = tuple(tuple(map(int,sys.stdin.readline().rstrip().split())) for _ in range(N)) # multi line with multi param
# s = sys.stdin.readline().rstrip()
# N = int(sys.stdin.readline())
# INF = float("inf")
import sys,collections

N = int(sys.stdin.readline())
#a = tuple(map(int,sys.stdin.readline().split())) # single line with multi param
a = list(map(int,input().split()))

import math
acc = a[0]
LIMIT=max(a)
minPrime = [0]*(LIMIT+1)
minPrime[1] = 1
def make():
    for i in range(2,LIMIT+1):
        if minPrime[i] == 0:
            minPrime[i] = i
            for j in range(i+i,LIMIT+1,i):
                if minPrime[j] == 0:
                    minPrime[j] = i
make()
# def factrial(N):
#     ret = []
#     while minPrime[N] != N:
#         ret.append(minPrime[N])
#         N = N//minPrime[N]
#     if N != 1:
#         ret.append(N)
#     return ret

def factrial(N):
    ret = set()
    while 1 != N:
        ret.add(minPrime[N])
        N = N//minPrime[N]
    if N != 1:
        ret.add(N)
    return ret

for i in range(N):
    acc = math.gcd(acc,a[i])
if acc != 1:
    print("not coprime")
    exit()

pairwise = True
p = set() #all prime
for e in a:
    if not pairwise:
        break
    f = factrial(e)
    if p & f != set():
        pairwise = False
    p = p | f

if pairwise:
    print("pairwise coprime")
else:
    print("setwise coprime")


### FIXED CODE ###

import math
from collections import defaultdict
pc = True
n = int(input())
a = list(map(int,input().split()))
g = math.gcd(a[0],a[1])
for i in range(2,n):
    g = math.gcd(g,a[i])
M = max(a)
class Sieve_of_Eratosthenes:
    def __init__(self, N):
        self.sieve = [-1] * (N+1)
 
        for i in range(2,N+1):
            if self.sieve[i] == -1:
                for j in range(1,1+N//i):
                    self.sieve[i*j] = i
 
    def isprime(self, num):
        if num <= 1:
            return False
        else:
            return self.sieve[num] == num
 
    def factorization(self, num):
        ret = set([])
        while num != 1:
            div = self.sieve[num]
            ret.add(div)
            num //= div
        return ret
 
sofe = Sieve_of_Eratosthenes(M)
ddic = defaultdict()
judge = set([])
 
for i in a:
    if not pc:
        break
    asf = sofe.factorization(i)
    
    if judge & asf != set():
        pc = False
    judge |= asf
if pc:
    print("pairwise coprime")
elif g == 1:
    print("setwise coprime")
else:
    print("not coprime")
### BUGGY CODE ###

N=int(input())
S=input()
Q=int(input())
K=map(int,input().split())

for k in K:
    D=[]
    M=[]
    C=[]
    for i in range(N):
        c=S[i]
        if c=='D':
            D.append(i)
        elif c=='M':
            M.append(i)
        elif c=='C':
            C.append(i)
    ans=0
    for d in D:
        for m in M:
            if m<=d or m-d>=k:
                continue
            for c in C:
                if c<=m or c-d>=k:
                    continue
                ans+=1
    print(ans)

### FIXED CODE ###

N=int(input())
S=tuple(map(ord,input()))
Q=int(input())
K=map(int,input().split())
D,M,C=map(ord,'DMC')

for k in K:
    ans=0
    d=m=dm=0
    for i in range(min(k-1,N)):
        c=S[i]
        if c==D:
            d+=1
        elif c==M:
            m+=1
            dm+=d
        elif c==C:
            ans+=dm
    for i in range(k-1,N):
        c=S[i]
        if c==D:
            d+=1
        elif c==M:
            m+=1
            dm+=d
        elif c==C:
            ans+=dm
        c=S[i-(k-1)]
        if c==D:
            d-=1
            dm-=m
        elif c==M:
            m-=1
    print(ans)
### BUGGY CODE ###

N = int(input())
A = list(map(int, input().split()))
ans = 0
for i in range(0, N-1):
  for j in range(i+1, N):
    ans = (ans + A[i]*A[j]) % (10**9 + 7)
print(ans)

### FIXED CODE ###

N = int(input())
A = list(map(int, input().split()))
ans = 0
S = sum(A) - A[0]
for i in range(0, N-1):
  ans = (ans + A[i] * S) % (10**9+7)
  S -= A[i+1]
print(ans)
### BUGGY CODE ###

from collections import deque

H, W = map(int, input().split())
maze = [input() for i in range(H)]
reached = [[0] * W for i in range(H)]
L = []

que = deque([])

for i in range(H):
    for j in range(W):
        if maze[i][j] == '#':
            L.append(0)
            continue
        que.append([i, j])
        while que:
            py, px = que.popleft()
            dy = (0, 1, 0, -1)
            dx = (1, 0, -1, 0)
            for k, t in zip(dy, dx):
                ny = py + k
                nx = px + t

                if ny < 0 or ny >= H or nx < 0 or nx >= W:
                    continue
                if reached[ny][nx]:
                    continue

                que.append([ny, nx])
                reached[ny][nx] += reached[py][px] + 1

                if maze[ny][nx] == '#':
                    L.append(reached[ny][nx])
                    reached = [[0] * W for i in range(H)]
                    que = deque([])
                    break

print(max(L))


### FIXED CODE ###

from collections import deque

H, W = map(int, input().split())
maze = [input() for i in range(H)]
reached = [[-1] * W for i in range(H)]

que = deque([])

for i in range(H):
    for j in range(W):
        if maze[i][j] == '.':
            continue
        reached[i][j] = 0
        que.append([i, j])

while que:
    py, px = que.popleft()
    dy = (0, 1, 0, -1)
    dx = (1, 0, -1, 0)
    for y, x in zip(dy, dx):
        ny = py + y
        nx = px + x
        if ny < 0 or ny >= H or nx < 0 or nx >= W:
            continue
        if reached[ny][nx] == -1:        
            que.append([ny, nx])
            reached[ny][nx] = reached[py][px] + 1

MAX = 0
for i in range(H):
    MAX = max(max(reached[i]), MAX)

print(MAX)
### BUGGY CODE ###

from fractions import gcd
mod = 10**9+7
def main():
  n = int(input())
  A = list(map(int, input().split()))
  cnt = 0
  m = A[0]
  for i in A[1:]:
    m = m // gcd(m, i) * i
  ans = 0
  for i in A:
    ans += m//i
    ans %= mod
  print(ans)
if __name__ == "__main__":
  main()

### FIXED CODE ###

from fractions import gcd
mod = pow(10, 9)+7
n = int(input())
A = list(map(int, input().split()))
m = A[0]
for i in range(1, n):
  m = m // gcd(m, A[i]) * A[i]
ans = 0
for i in A:
  ans += m//i
print(ans%mod)
### BUGGY CODE ###

n,m,k = map(int,input().split())
par = []
for i in range(n):
    par.append(i)  #初期親
rank = [1 for i in range(n)] #初期ランク
flist = [[] for i in range(n)]
blist = [[] for i in range(n)]
cut = []
def find(n): #親検索andランク短縮
    global cut
    if par[n] == n:
        for i in range(len(cut)):
            par[cut[i]] = n
        cut = []
        return n
    else:
        cut.append(n)
        find(par[n])
        return find(par[n])
def shorten(n): # ランクを2にする
    global cut
    if par[n] == n:
        for i in range(len(cut)):
            par[cut[i]] = n
        cut = []
    else:
        cut.append(n)
        shorten(par[n])
def unite(a,b): #グループ併合
    x = find(a)
    y = find(b) #根っこ同士をくっつける
    if x == y: 
        return    #既に同一ユニオンなら何もしない
    if rank[x] < rank[y]:
        par[x] = y 
    elif rank[x] == rank[y]:
        par[y] = x
        rank[x] += 1
    else:
        par[y] = x
for i in range(m):
    a,b = map(int,input().split())
    a -= 1
    b -= 1
    flist[a].append(b)
    flist[b].append(a)
    unite(a,b)
for i in range(n):
    shorten(i)
for i in range(k):
    a,b = map(int,input().split())
    a -= 1
    b -= 1
    if par[a] == par[b]:
        blist[a].append(b)
        blist[b].append(a)
for i in range(n):
    ans = par.count(par[i]) -len(flist[i])-len(blist[i])-1
    print(ans,end = ' ')

### FIXED CODE ###

n,m,k = map(int,input().split())
import sys
rks = [None] *n
sys.setrecursionlimit(10**9)
fgraph = [list() for i in range(n)]
bgraph = [list() for i in range(n)]
cgraph = [list() for i in range(n)]
g = [[]for i in range(n)]
for i in range(m):
        a,b = map(int, input().split())
        fgraph[a-1].append(b)
        fgraph[b-1].append(a)
def dfs(graph,s,r):
    if rks[s] is None:
        rks[s] = r
    for i in range(len(graph[s])):
        if rks[graph[s][i]-1] is not None:
            continue
        g[r].append(0)
        dfs(graph, graph[s][i]-1,r)
c = -1
for i in range(n):
    if rks[i] is None:
        c += 1
        dfs(fgraph, i, c)
for i in range(k):
        c,d = map(int, input().split())
        if rks[c-1] == rks[d-1]:
            bgraph[d-1].append(c)
            bgraph[c-1].append(d)
for i in range(n):
        print(len(g[rks[i]]) - len(fgraph[i]) - len(bgraph[i]) )
### BUGGY CODE ###

def compare(a, A):
    R=0
    for i in range(0, len(A)):
        if(a==A[i]):
            R+=1
        elif(a<A[i]):
            break
    return R

def result(R,a):
    if(R==a):
        return 0
    elif(a<R):
        return R-a
    return R

N = int(input())

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

R=0
C=compare(a[0],a)
R+=result(C,a[0])
T=C

for i in range(1, N):
    if(a[i] != a[i-1]):
        C=compare(a[i],a[T:])
        R+=result(C,a[i])
        T+=C


print(R)


### FIXED CODE ###

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

a.sort()
a.append(0)

T=[]
j=0
t=0
s=0
for i in range(N):
    j+=1
    if a[i] != a[i+1]:
        if j-s > a[i]:
            t+=(j-s)-a[i]
        elif j-s < a[i]:
            t += j-s
        s=j

print(t)
### BUGGY CODE ###

from collections import deque

def resolve():
    n = int(input())
    aa = list(map(int, input().split()))
    bb = list(map(int, input().split()))

    q = deque()
    diffs = set()

    for i in range(n):
        if bb[i] < aa[i]:
            print(-1)
            return

        if bb[i] != aa[i]:
            diffs.add(i)

        bef_i = i-1 if i > 0 else n-1
        aft_i = i+1 if i < n-1 else 0
        if bb[i] > aa[i] and bb[i] > bb[bef_i] + bb[aft_i]:
            q.append(i)

    count = 0

    while len(q) > 0:
        i = q.popleft()

        bef_i = i-1 if i > 0 else n-1
        bef2_i = bef_i-1 if bef_i > 0 else n-1
        aft_i = i+1 if i < n-1 else 0
        aft2_i = aft_i+1 if aft_i < n-1 else 0

        bb[i] = bb[i] - bb[bef_i] - bb[aft_i]
        count += 1

        if bb[i] == aa[i]:
            diffs.remove(i)

        if bb[i] < aa[i]:
            print(-1)
            return

        if bb[i] > aa[i] and bb[i] > bb[bef_i] + bb[aft_i]:
            q.append(i)

        if bb[bef_i] > aa[bef_i] and bb[bef_i] > bb[bef2_i] + bb[i]:
            q.append(bef_i)

        if bb[aft_i] > aa[aft_i] and bb[aft_i] > bb[aft2_i] + bb[i]:
            q.append(aft_i)

    if len(diffs) > 0:
        print(-1)
        return

    print(count)
resolve()

### FIXED CODE ###

from collections import deque

def resolve():
    n = int(input())
    aa = list(map(int, input().split()))
    bb = list(map(int, input().split()))

    q = deque()
    diffs = set()

    for i in range(n):
        if bb[i] != aa[i]:
            diffs.add(i)

        bef_i = i-1 if i > 0 else n-1
        aft_i = i+1 if i < n-1 else 0
        if bb[i] > aa[i] and bb[i] > bb[bef_i] + bb[aft_i]:
            q.append(i)

    count = 0

    while len(q) > 0:
        i = q.popleft()

        bef_i = i-1 if i > 0 else n-1
        bef2_i = bef_i-1 if bef_i > 0 else n-1
        aft_i = i+1 if i < n-1 else 0
        aft2_i = aft_i+1 if aft_i < n-1 else 0

        count += (bb[i] - aa[i]) // (bb[bef_i] + bb[aft_i])
        bb[i] = (bb[i] - aa[i]) % (bb[bef_i] + bb[aft_i]) + aa[i]

        if bb[i] == aa[i]:
            diffs.remove(i)

        if bb[bef_i] > aa[bef_i] and bb[bef_i] > bb[bef2_i] + bb[i]:
            q.append(bef_i)

        if bb[aft_i] > aa[aft_i] and bb[aft_i] > bb[aft2_i] + bb[i]:
            q.append(aft_i)

    if len(diffs) > 0:
        print(-1)
        return

    print(count)
resolve()
### BUGGY CODE ###

n,k = list(map(int, input().split()))
al = list(map(int,input().split()))
s = []
l=[]
x=0
while x<=n:
    for j in al:
        if j not in s:
            s.append(j)
        else:
            s=s[:s.index(j)]
    if s in l:        
        break
    l.append(s.copy())
    x+=1
#print(k,len(l))
print(*l[k%len(l)-1])

### FIXED CODE ###

# coding: utf-8
import sys
from collections import defaultdict
from bisect import bisect_right

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# Aの中で次に同じ数字が出てくるindex
N, K = lr()
A = lr()
next_index = [-1] * N
dict = defaultdict(list)
for i in range(N):
    dict[A[i]].append(i)

for i in range(N):
    a = A[i]
    length = len(dict[a])
    j = bisect_right(dict[a], i)
    next_index[i] = dict[a][j%length]

cur = 0
time = 1
while cur != N:
    ne = next_index[cur]
    if ne <= cur:
        time += 1
    cur = ne + 1
# timeで一周する
K %= time
time = 0
cur = 0
while time < K:
    ne = next_index[cur]
    if ne <= cur:
        time += 1
    if time == K:
        break
    cur = ne + 1

answer = []
while cur < N:
    ne = next_index[cur]
    if ne <= cur:
        answer.append(A[cur])
        cur += 1
    else:
        cur = ne + 1

print(*answer)
# 14
### BUGGY CODE ###

N,M,Q = map(int,input().split())
ls_rq = [list(map(int, input().split())) for i in range(Q)]

#深さ優先探索により各数列を生成する
As=[]
from queue import LifoQueue as lq
S=lq()
S.put([])
while not S.empty():
  a=S.get()
  if len(a)==N:
    As.append(a)
  else:
    if len(a)==0:
      b=1
    else:
      b=a[-1]
    for  i in range(b,M+1):
      S.put(a+[i])

#各数列のスコアを求める
ls_score=[]
for ls in As:
  score=0
  for j in range(Q):
    if ls[ls_rq[j][1]-1]-ls[ls_rq[j][0]-1]==ls_rq[j][2]:
      score+=ls_rq[j][3]
  ls_score.append(score)    
  score=0

#スコアの最大値を求める  
ans=max(ls_score)  
print(ans)  

### FIXED CODE ###

N,M,Q = map(int,input().split())
ls_rq = [list(map(int, input().split())) for i in range(Q)]

#深さ優先探索により各数列を生成する
As=[]
from queue import LifoQueue as lq
S=lq()
S.put([])
while not S.empty():
  a=S.get()
  if len(a)==N:
    As.append(a)
  else:
    if len(a)==0:
      b=1
    else:
      b=a[-1]
    for  i in range(b,M+1):
      S.put(a+[i])

#各数列のスコアを求める
ls_score=[]
for ls in As:
  score=0
  for j in range(Q):
    if ls[ls_rq[j][1]-1]-ls[ls_rq[j][0]-1]==ls_rq[j][2]:
      score+=ls_rq[j][3]
  ls_score.append(score)    
  score=0

#スコアの最大値を求める  
ans=max(ls_score+[0])  
print(ans)
### BUGGY CODE ###

import sys
def input():
    return sys.stdin.readline()[:-1]

import itertools
import numpy as np

res = 999999999999999999

H, W, K = [int(i) for i in input().split()]
arr = []
for h in range(H):
  arr.append([int(v) for v in input()])

arr = np.vstack(arr)

for p in itertools.product([0, 1], repeat = H-1):
  sp = np.zeros((sum(p)+1, W), int)
  row = 0
  sp[0] += arr[0]
  for j in range(H-1):
    if p[j]:
      row += 1
    sp[row] += arr[j+1]
  if np.max(sp) > K:
    continue
  
  sum_arr = np.zeros(len(sp), int)
  cut_cnt = sum(p)
  for c in range(W):
    sum_arr += sp[:, c]
    if max(sum_arr) > K:
      sum_arr = sp[:, c]
      cut_cnt += 1
  if cut_cnt < res:
    res = cut_cnt
print(res)

### FIXED CODE ###

import itertools
import numpy as np

res = 999999999999999999

H, W, K = [int(i) for i in input().split()]
arr = []
for h in range(H):
  arr.append([int(v) for v in input()])

arr = np.vstack(arr)

for p in itertools.product([0, 1], repeat = H-1):
  if sum(p) > res:
    continue
  sp = np.zeros((sum(p)+1, W), int)
  row = 0
  sp[0] += arr[0]
  for j in range(H-1):
    if p[j]:
      row += 1
    sp[row] += arr[j+1]
  if np.max(sp) > K:
    continue
  
  sum_arr = np.zeros(len(sp), int)
  cut_cnt = sum(p)
  for c in range(W):
    sum_arr += sp[:, c]
    if max(sum_arr) > K:
      sum_arr = sp[:, c]
      cut_cnt += 1
      if cut_cnt > res:
        break
  if cut_cnt < res:
    res = cut_cnt
print(res)
### BUGGY CODE ###

import heapq

def dijkstra(s):
	hq = [(0, s)]
	heapq.heapify(hq) # リストを優先度付きキューに変換
	cost = [float('inf')] * n # 行ったことのないところはinf
	cost[s] = 0 # 開始地点は0
	while hq:
		c, v = heapq.heappop(hq)
		if c > cost[v]: # コストが現在のコストよりも高ければスルー
			continue
		for d, u in e[v]:
			tmp = d + cost[v]
			if tmp < cost[u]:
				cost[u] = tmp
				heapq.heappush(hq, (tmp, u))
	return cost

n = int(input())
e = [[] for _ in range(n)]
for _ in range(n-1):
	a,b,c = map(int,input().split())
	a,b = a-1, b-1
	e[a].append((c, b))
	e[b].append((c, a))
q,k = map(int,input().split())
for _ in range(q):
	x,y = map(int,input().split())
	print(dijkstra(x-1)[k-1] + dijkstra(k-1)[y-1])

### FIXED CODE ###

import heapq

def dijkstra(s):
	hq = [(0, s)]
	heapq.heapify(hq) # リストを優先度付きキューに変換
	cost = [float('inf')] * n # 行ったことのないところはinf
	cost[s] = 0 # 開始地点は0
	while hq:
		c, v = heapq.heappop(hq)
		if c > cost[v]: # コストが現在のコストよりも高ければスルー
			continue
		for d, u in e[v]:
			tmp = d + cost[v]
			if tmp < cost[u]:
				cost[u] = tmp
				heapq.heappush(hq, (tmp, u))
	return cost

n = int(input())
e = [[] for _ in range(n)]
for _ in range(n-1):
	a,b,c = map(int,input().split())
	a,b = a-1, b-1
	e[a].append((c, b))
	e[b].append((c, a))
q,k = map(int,input().split())
l = dijkstra(k-1)
for _ in range(q):
	x,y = map(int,input().split())
	print(l[x-1] + l[y-1])
### BUGGY CODE ###

#!/usr/bin/env python3
import numpy as np


def solve(N):
    fx = np.zeros(N + 1, dtype=np.uint32)
    for i in range(1, N + 1):
        fx[i::i] += 1
    return np.sum(np.arange(0, N + 1, dtype=np.uint64) * fx)


def main():
    N = int(input())  # type: int
    answer = solve(N)
    print(answer)


if __name__ == "__main__":
    main()


### FIXED CODE ###

#!/usr/bin/env python3

#                 N    N'
#   | 1  2  3  4  5
# 1 | 1  2  3  4  5 :  N // 1   1 * N' (N'+1) // 2
# 2 |    2     4    :  N // 2   2 * N' (N'+1) // 2
# 3 |       3       :  N // 3   3 * N' (N'+1) // 2
# 4 |          4    :  N // 4   4 * N' (N'+1) // 2
# 5 |             5 :  N // 5   5 * N' (N'+1) // 2


def solve(N):
    answer = 0
    for i in range(1, N + 1):
        mprime = N // i
        answer += i * (mprime * (mprime + 1)) // 2
    return answer


def main():
    N = int(input())  # type: int
    answer = solve(N)
    print(answer)


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

N, C, K = map(int, input().split())
t_list = [int(input()) for i in range(N)]

t_list.sort()

count = 0
i = 0
while t_list:
    passenger = 1
    t = t_list.pop(0)
    count += 1
    while t_list:
        tmp = t_list.pop(0)

        if passenger < C and tmp - t <= K:
            passenger += 1
        else:
            t_list.insert(0, tmp)
            break

print(count)

### FIXED CODE ###

N, C, K = map(int, input().split())
t_list = [int(input()) for i in range(N)]

t_list.sort()

count = 0
passenger = 0
time = 0

for t in t_list:
    if passenger == 0:
        passenger += 1
        count += 1
        time = t
    elif 1 <= passenger < C:
        if t - time <= K:
            passenger += 1
        else:
            passenger = 1
            count += 1
            time = t
    else:
        passenger = 1
        count += 1
        time = t

print(count)