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

N = int(input())
p = []
ph = []
for i in range(N):
    x,y,h = map(int,input().split())
    p += [[x,y]]
    ph += [h]

hmaxi = ph.index(max(ph))
pmax = p.pop(hmaxi)
hmax = ph.pop(hmaxi)
H,d = hmax,0
ans = False

while not ans:
    C = [[pmax[0]+d, pmax[1]], [pmax[0]-d, pmax[1]], [pmax[0], pmax[1]+d], [pmax[0], pmax[1]-d]]
    for i in range(d-1):
        C += [[pmax[0]+i, pmax[1]+i]]
        C += [[pmax[0]+i, pmax[1]-i]]
        C += [[pmax[0]-i, pmax[1]+i]]
        C += [[pmax[0]-i, pmax[1]-i]]
    for xy in C:
        ans = True
        for i in range(N-1):
            if ph[i] != H - abs(p[i][0]-xy[0]) - abs(p[i][1]-xy[1]):
                ans = False
                break
        if ans:
            print(xy[0],xy[1],H)
            break
    d += 1
    H += 1


### FIXED CODE ###

N = int(input())
x,y,h = [],[],[]
for i in range(N):
    X,Y,H = map(int,input().split())
    x += [X]
    y += [Y]
    h += [H]
a = 0
while h[a] == 0:
    a += 1 
    if a == N:
        for i in range(101):
            if i not in x:  X = i
        for i in range(101):
            if i not in y:  Y = i
        print(X,Y,1)
        exit()

for cx in range(101):
    for cy in range(101):
        H = h[a] + abs(x[a]-cx) + abs(y[a]-cy)
        ans = True
        R = list(range(N))[0:a] + list(range(N))[a+1:N]
        for i in R:
            if h[i] != max(H - abs(x[i]-cx) - abs(y[i]-cy),0):
                ans = False
                break
        if ans:
            print(cx,cy,H)
            break
    else:
        continue
    break
### BUGGY CODE ###

import numpy as np
def solve():
    N = int(input())
    S2 = [0]*(2*N)
    for i in range(N):
        S2[i] = input()*2
        S2[i+N] = S2[i]
    check = [[[0]*(2*N) for _ in range(2*N)] for _ in range(2*N-1)]
    cum = [[[0]*(2*N) for _ in range(2*N)] for _ in range(2*N-1)]
    for i in range(2*N-1):
        for j in range(2*N-1):
            for k in range(-N+1,N):
                if j+k>=0 and j+k<=2*N-1 and i-k>=0 and i-k<=2*N-1:
                    check[k][i+1][j+1] = S2[i][j]==S2[j+k][i-k]
    for i in range(1,2*N):
        for j in range(1,2*N):
            for k in range(-N+1,N):
                cum[k][i][j] = cum[k][i-1][j]+cum[k][i][j-1]-cum[k][i-1][j-1]+check[k][i][j]
                if i>=N+1:
                    cum[k][i][j] -= check[k][i-N][j]
                if j>=N+1:
                    cum[k][i][j] -= check[k][i][j-N]
                if i>=N+1 and j>= N+1:
                    cum[k][i][j] += check[k][i-N][j-N]
    ans = 0
    for k in range(-N+1,0):
        A,B = -k+N,N
        while A<2*N:
            if cum[A-B][A][B]==N*N:
                ans += 1
            A += 1
            B += 1
    for k in range(N):
        A,B = N,k+N
        while B<2*N:
            if cum[A-B][A][B]==N*N:
                ans += 1
            A += 1
            B += 1
    return ans
print(solve())

### FIXED CODE ###

def solve():
    N = int(input())
    S2 = [0]*N
    for i in range(N):
        S2[i] = input()
    ans = 0
    for k in range(N):
        cum = [[0]*(N+1) for _ in range(N+1)]
        for i in range(1,N+1):
            for j in range(1,N+1):
                cum[i][j] = cum[i-1][j]+cum[i][j-1]-cum[i-1][j-1]+(S2[i-1][j-1]==S2[(j-1+k)%N][(i-1-k)%N])
                if i==N and j==N:
                    ans += (cum[i][j]==N*N)*N
    return ans
print(solve())
### BUGGY CODE ###

count = int(input())
nums = input().split(" ")

product = 1

if ("0" in nums):
    print(0)
else:
    for i in range(count):
        product *= int(nums[i])
    if (product > 10**18):
        print(-1)
    else:
        print(product)

### FIXED CODE ###

count = int(input())
nums = input().split(" ")

product = 1

if ("0" in nums):
    print(0)
else:
    for i in nums:
        product *= int(i)
        if (product > 10**18):
            print(-1)
            exit()
    print(product)
### BUGGY CODE ###

n, m = map(int, input().split())
if m%n==0:
    print(m//n)
else:
    index=m
    while index >0:
        if m%index==0:
            if m//index > n-1:
                print(index)
                break
        index-=1

### FIXED CODE ###

import math
import time
n, m = map(int, input().split())
flag=0
if m%n==0:
    print(m//n)

else:
    start = time.time()
    index=m//n
    while index >0:
        elapsedTime = time.time()-start
        if elapsedTime > 1:
            flag=1
            break
        elif m%index==0:
            print(index)
            break
        index-=1

    if flag==1:
        index = 1
        while index < m+1:
            if m % index == 0:
                if index > n-1:
                    print(m//index)
                    break
            index += 1
### BUGGY CODE ###

a, b, x = map(int, input().split())
print (sum( 1 for i in range(a,b+1) if i % x == 0))

### FIXED CODE ###

a, b, x = map(int, input().split())
ans = b//x - a//x
#if b%x == 0:ans +=1
if a%x == 0:ans +=1
print (ans)
### BUGGY CODE ###

from collections import defaultdict
N, S = map(int, input().split())
A = tuple(map(int, input().split()))

mod = 998244353
U = 3000

pow2 = [1] * (U + 1)
for i in range(1, U + 1):
    pow2[i] = pow2[i - 1] * 2 % mod

dp = defaultdict(int)
dp[(0, 0)] = 1

cnt = [0] * (U + 1)

tmp = 0
for i, a in enumerate(A):
    newDP = defaultdict(int)
    for (sm, cnt), v in dp.items():
        # 追加しない
        newDP[(sm, cnt)] += v
        newDP[(sm, cnt)] %= mod
        # 追加する
        if sm+a <= S:
            newDP[(sm+a, cnt + 1)] += v
            newDP[(sm+a, cnt + 1)] %= mod
    dp = newDP

ans = 0
for i in range(N + 1):
    ans = (ans + pow2[N - i] * dp[(S, i)]) % mod
print(ans)

### FIXED CODE ###

import numpy as np
import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)
fft = np.fft.rfft
ifft = np.fft.irfft
mod = 998244353

N, S = map(int, input().split())
A = list(map(int, input().split()))
U = 3003

dp = np.zeros(U+10, dtype=np.int64)
dp[0] = 1
for a in A:
    newDP = dp.copy() * 2
    newDP[a:] += dp[:-a]
    newDP %= mod
    dp = newDP

print(dp[S])
### BUGGY CODE ###

from itertools import combinations

input()
l = sorted(map(int, input().split()))
print(sum(a + b > c for a, b, c in combinations(l, 3)))


### FIXED CODE ###

from collections import deque
from bisect import bisect_left

n = int(input())
l = sorted(map(int, input().split()))
ld = deque(l)
cnt = 0
for a in range(n - 2):
    l_a = ld.popleft()
    for b in range(a + 1, n - 1):
        cnt += bisect_left(l, l_a + l[b]) - b - 1
print(cnt)
### BUGGY CODE ###

import sys
n,k=map(int,input().split())
l=list(map(int,input().split()))
dp=[sys.maxsize]*n
dp[0]=0
for i in range(n):
    for j in range(i+1,i+k+1):
        if j<n:
            dp[j]=min(dp[j], dp[i]+ abs(l[i]-l[j]))


print(dp[-1])
    
    


### FIXED CODE ###

import sys
n,k=map(int,input().split())
l=list(map(int,input().split()))
dp=[sys.maxsize]*n
dp[0]=0
for i in range(n):
    for j in range(i+1,i+k+1):
        if j<n:
            dp[j]=min(dp[j], dp[i]+ abs(l[i]-l[j]))


print(dp[-1])
### BUGGY CODE ###

s=list(input())
q=int(input())
n=0
for i in range(q):
    li=input().split()
    if int(li[0])==1:
        n+=1
    elif int(li[0])==2:
        if (n%2==0 and int(li[1])==1) or (n%2==1 and int(li[1])==2):
            s.insert(0,li[2])
        else:
            s.append(li[2])
if n%2==0:
    print(''.join(s))
else:
    s.reverse()
    print(''.join(s))


### FIXED CODE ###

from collections import deque
s=input()
q=int(input())
n=0
que=deque(s)
for i in range(q):
    l=input()
    if l[0]=='1':
        n+=1
    else:
        if (l[2]=='1' and n%2==0) or (l[2]=='2' and n%2==1):
            que.appendleft(l[4])
        else:
            que.append(l[4])

ans=''.join(que)
if n%2==0:
    print(ans)
else:
    print(ans[::-1])
### BUGGY CODE ###

import numpy as np

h, w, k = [int(i) for i in input().split()]
s = np.zeros([h,w])
ans = (w-1)*(h-1)

for i in range(h):
    st = [int(j) for j in list(input())]
    s[i,:] = st
idx = []
for i in range(1<<h-1):
    tmp = []
    g = []
    for j in range(h-1):
        if ((i>>j)&1):
            tmp.append(j+1)

    n = len(tmp)
    choco = np.zeros([n+1,w])
    for j in range(n+1):
        if n == 0:
            choco = np.sum(s,axis=0)
        elif n > 0:
            if j == n:
                choco[j] = np.sum(s[tmp[j-1]:,:],axis=0)
            elif j == 0:
                choco[j] = np.sum(s[:tmp[j],:], axis=0)
            else:
                choco[j] = np.sum(s[tmp[j-1]:tmp[j],:], axis=0)
    w_div = 0
    w_div0 = 0
    nn = 0
    ans0 = (w-1)*(h-1)
    
    while w_div < w+1:
        if w_div == 0:
            num_choco = np.zeros((1,1))
            num_choco[0,0] = np.array(np.sum(choco))
        else:
            if n == 0:
                num_choco = np.zeros((1, 2))
                if w_div0 == 0:
                    num_choco[:,0] = np.sum(choco[:w_div])
                else:
                    num_choco[:,0] = np.sum(choco[w_div0:w_div])
                num_choco[:,1] = np.sum(choco[w_div:])
                
            else:
                num_choco = np.zeros((n+1,2))
                if w_div0 == 0:
                    num_choco[:,0] = np.sum(choco[:,:w_div],axis=1).T
                else:
                    num_choco[:,0] = np.sum(choco[:,w_div0:w_div],axis=1).T
                num_choco[:,1] = np.sum(choco[:,w_div:],axis=1).T
                
        if np.any(num_choco > k):
            if np.any(num_choco[:,0] > k) and w_div != 0:
                w_div0 = w_div-1
                nn += 1
                w_div += 0
            else:
                w_div +=1
        else:
            if w_div == w:
                ans0 = n + nn

                ans = min(ans,ans0)
            w_div += 1
print(ans)

### FIXED CODE ###

import numpy as np
import itertools
H, W, K = [int(_) for _ in input().split()]
S = np.zeros((H + 1, W + 1), dtype=int)
S[1:, 1:] = [[int(_) for _ in input()] for _ in range(H)]
cum = S.cumsum(axis=0).cumsum(axis=1)
# print(cum)

ans = 10**10
for bs in itertools.product([True, False], repeat=H - 1):
    bs = [True] + list(bs) + [True]
#     print(bs)
    idxs = []
    for i, b in enumerate(bs):
        if b:
            idxs += [i]
    cum2 = np.array([cum[i2] - cum[i1] for i1, i2 in zip(idxs, idxs[1:])])
    i = 0
    cnt = sum(bs) - 3
    while i < W:
        di = min(
            np.searchsorted(c[i + 1:] - c[i], K, side='right') for c in cum2)
        if di == 0:
            cnt = 10**10
            break
        i += di
        cnt += 1
    ans = min(ans, cnt)
print(ans)
### BUGGY CODE ###

ii = lambda : int(input())
mi = lambda : map(int,input().split())
li = lambda : list(map(int,input().split()))

n = ii()

import numpy as np

c = np.array(range(1,n+1), dtype=np.uint64)
nn = np.array([n] * n)
d = nn//c

e = d * (d+1) //2 * c

# print(e)
print(int(sum(e)))

### FIXED CODE ###

ii = lambda : int(input())
mi = lambda : map(int,input().split())
li = lambda : list(map(int,input().split()))

n = ii()

# n以下の整数でiで割り切れる数の総和
def sumofdivi(n,i):
    a = n//i
    b = (a*(a+1))//2*i
    return b

ans = 0
for i in range(1,n+1):
    v = sumofdivi(n,i)
    ans += v

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

import sys

n,k = map(int, input().split())
if n == 0 or k == 1:
  print(0)
  sys.exit()
while True:
  ans = abs(n-k)
  if ans >= n:
    break
  elif n > ans:
    n = ans
print(n)

### FIXED CODE ###

n, k = map(int, input().split())
ans = min(n%k, k-(n%k))
print(ans)
### BUGGY CODE ###

N=raw_input()
LN=raw_input().split()

n = int(N)
ln = [int(i) for i in LN]

c = []
for i in range(n):
    for j in range(i):
        for k in range(j):
            c.append([i,j,k])


r = []
for i in c:
    x, y, z = i
    a = ln[x]
    b = ln[y]
    c = ln[z]
    if not a < b + c:
        continue
    if not b < c + a:
        continue
    if not c < a + b:
        continue
    r.append(i)

print len(r)

### FIXED CODE ###

import bisect

N=int(raw_input())
LN=map(int, raw_input().split())

LN.sort()

r = 0
for i in xrange(N-1, 1, -1):
    a = LN[i]
    for j in xrange(i-1, 0, -1):
        b = LN[j]
        if a > 2*b:
            break
        idx = bisect.bisect_left(LN, a-b+1)
        if idx < j:
            r += j - idx

print r
### BUGGY CODE ###

n = int(input())
h = list(map(int, input().split()))
a = []
for i in range(n):
  k = 0
  p = h[i]
  for j in range(i + 1, n):
    if p >= h[j]:     
      k += 1
      p = h[j]
    else:
      break
  a.append(k)
print(max(a))

### FIXED CODE ###

n = int(input())
h = list(map(int, input().split()))
a = [0]
i = 0
while i < n - 1:
  k = 0
  p = h[i]
  for j in range(i + 1, n):
    if p >= h[j]:
      p = h[j]
      k += 1
    else:
      break
  i = j
  a.append(k)
print(max(a))
### BUGGY CODE ###

import sys
import numpy as np
input = sys.stdin.readline
n, k = map(int, input().split())
array = np.array(list(map(int, input().split())))
dp = np.array([float('inf')]*n)
dp[0] = 0
for i in range(1, n):
  for j in range(1, k+1):
    #print(i, j, dp)
    if j > i:
      continue
    dp[i] = min(dp[i-j] + abs(array[i]-array[i-j]), dp[i])
print(int(dp[-1]))

### FIXED CODE ###

import sys
import numpy as np
# inputを高速化する。
input = sys.stdin.readline
n, k = map(int, input().split())
h = [int(i) for i in input().split()]
# dpの配列を作る。
dp = np.zeros(n, dtype=int)
# hの配列を作る。
h = np.array(h)
for i in range(1, n):
    # start は負になることはない。
    start = max(0, i-k)
    # 行列として足し算できるのでforを使う必要がない。
    dp[i] = min(dp[start: i] + np.abs(h[i] - h[start: i]))
print(dp[n-1])
### BUGGY CODE ###

import numpy as np
from itertools import permutations

n = int(input())

li = []
for _ in range(n):
    i, j = map(int, input().split())
    li.append(np.array([i, j]))

li2 = permutations(li)

re = []
for a in li2:
    dis = 0 
    for (x1,y1),(x2,y2) in zip(a,a[1:]):
        dis += ((x1-x2)**2+(y1-y2)**2)**0.5
    re.append(dis)

print(np.average(re))

### FIXED CODE ###

import numpy as np
from itertools import permutations
from math import hypot

n = int(input())

li = []
for _ in range(n):
    i, j = map(int, input().split())
    li.append(np.array([i, j]))

li2 = permutations(li)

re = []
for a in li2:
    dis = 0 
    for (x1,y1),(x2,y2) in zip(a,a[1:]):
        dis += hypot(x1-x2, y1-y2)
    re.append(dis)

print(np.average(re))
### BUGGY CODE ###

x,y,z,k = map(int,input().split())
lisa = list(map(int,input().split()))
lisb = list(map(int,input().split()))
lisc = list(map(int,input().split()))
lisc.sort(reverse=True)
an,ans=[],[]
for num in lisb:
    for nu in lisa:an.append(num+nu)
an.sort(reverse=True)
an = an[:min(3001,x*y*z+1)]
for num in lisc:
    for nu in an:ans.append(num+nu)
ans.sort(reverse=True)
for i in range(k):print(ans[i])


### FIXED CODE ###

x,y,z,k = map(int,input().split())
lisa = list(map(int,input().split()))
lisb = list(map(int,input().split()))
lisc = list(map(int,input().split()))
lisa.sort(reverse=True)
lisb.sort(reverse=True)
lisc.sort(reverse=True)
an = []
ans = []
for num in lisb:
    for nu in lisa:
        an.append(num+nu)
an.sort(reverse=True)
an = an[:min(3001,x*y*z+1)]
for num in lisc:
    for nu in an:
        ans.append(num+nu)
ans.sort(reverse=True)
for i in range(k):
    print(ans[i])
### BUGGY CODE ###

S = input()
Q = int(input())
query_list = []
for i in range(Q):
    query_list.append(input())
# print(S, Q, query_list)

result = S
reverse_flag = False

for i in range(Q):
    # print(i + 1)
    q = query_list[i]
    # print(q)
    t = int(q[0])
    if t == 1:
        reverse_flag = not reverse_flag
    else:
        t, f, c = q.split()
        f = int(f)
        if f == 1:
            if reverse_flag:
                result = result + c
            else:
                result = c + result
        else:
            if reverse_flag:
                result = c + result
            else:
                result = result + c
    # print(t, f, c, result)
    # print("--------")
if reverse_flag:
    result = result[::-1]
print(result)

### FIXED CODE ###

S = input()
Q = int(input())
query_list = []
for i in range(Q):
    query_list.append(input())
# print(S, Q, query_list)

M = 10 ** 6
start_position = int(M / 2)
left_position = start_position
right_position = start_position + len(S)
result = ["-"] * M
for i in range(len(S)):
    # print(i + left_position)
    result[i + left_position] = S[i]

# result = "".join(result[left_position:right_position])
# print(result)
# exit(0)
reverse_flag = False

for i in range(Q):
    # print(i + 1)
    # print(result[left_position:right_position])
    q = query_list[i]
    # print(q)
    t = int(q[0])
    if t == 1:
        reverse_flag = not reverse_flag
    else:
        t, f, c = q.split()
        f = int(f)
        c = c
        if f == 1:
            if reverse_flag:
                result[right_position] = c
                right_position += 1
            else:
                result[left_position - 1] = c
                left_position -= 1
        else:
            if reverse_flag:
                result[left_position - 1] = c
                left_position -= 1
            else:
                result[right_position] = c
                right_position += 1
    # print(t, f, c, result)
    # print("--------")
    #print(result[left_position:right_position])
# result = str(result)
# result = "".join(result)
# print(result)
# print(result[left_position:right_position])

result = "".join(result[left_position:right_position])
if reverse_flag:
    result = result[::-1]
print(result)
### BUGGY CODE ###

class SegmentTree :
    def __init__(self, n) :
        self.n = n
        self.N0 = 1 << n.bit_length()
        self.data = [10**15] * (self.N0*2)
 
    def update(self, l, r, val) :
        l += self.N0
        r += self.N0
        while l < r:
            if l & 1 :
                self.data[l] = min(self.data[l], val)
                l += 1
            if r & 1:
                self.data[r-1] = min(self.data[r-1], val)
                r -= 1
            l //= 2
            r //= 2
 
    def query(self, i) :
        i += len(self.data) // 2
        ret = self.data[i]
        while i > 0 :
            i //= 2
            ret = min(ret, self.data[i])
        return ret if ret < 10**15 else -1
import bisect
N, Q = map(int, input().split())
roads = []
for _ in range(N):
    s, t, x = map(int, input().split())
    roads.append((x, s, t))
compress_list = []
query = []
for _ in range(Q):
    d = int(input())
    compress_list.append(d)
S = SegmentTree(Q)
for x, s, t in roads:
    l = bisect.bisect_left(compress_list, s-x)
    r = bisect.bisect_left(compress_list, t-x)
    S.update(l, r, x)
for i in range(Q):
    print(S.query(i))   

### FIXED CODE ###

class SegmentTree :
    def __init__(self, n) :
        self.n = n
        self.N0 = 1 << n.bit_length()
        self.data = [10**15] * (self.N0*2)
 
    def update(self, l, r, val) :
        l += self.N0
        r += self.N0
        while l < r:
            if l & 1 :
                self.data[l] = min(self.data[l], val)
                l += 1
            if r & 1:
                self.data[r-1] = min(self.data[r-1], val)
                r -= 1
            l //= 2
            r //= 2
 
    def query(self, i) :
        i += len(self.data) // 2
        ret = self.data[i]
        while i > 0 :
            i //= 2
            ret = min(ret, self.data[i])
        return ret if ret < 10**15 else -1
import bisect
import sys
input = sys.stdin.readline
N, Q = map(int, input().split())
roads = []
for _ in range(N):
    s, t, x = map(int, input().split())
    roads.append((x, s, t))
compress_list = []
query = []
for _ in range(Q):
    d = int(input())
    compress_list.append(d)
S = SegmentTree(Q)
for x, s, t in roads:
    l = bisect.bisect_left(compress_list, s-x)
    r = bisect.bisect_left(compress_list, t-x)
    S.update(l, r, x)
for i in range(Q):
    print(S.query(i))
### BUGGY CODE ###

N = int(input())  # 1 <= N <= 4000
S = input()  # [RGB]{N}
L = {
    'R': tuple(i for i, v in enumerate(S) if v == 'R'),
    'G': tuple(i for i, v in enumerate(S) if v == 'G'),
    'B': tuple(i for i, v in enumerate(S) if v == 'B')
}

ans = 0
for i in range(N):
    for j in range(i+1, N):
        if S[i] != S[j]:
            other = list({'R', 'G', 'B'} - {S[i], S[j]})[0]
            tmp = j + j - i

            ans += len([k for k in L[other] if (k > j) and (tmp != k)])
print(ans)





### FIXED CODE ###

N = int(input())  # 1 <= N <= 4000
S = input()  # [RGB]{N}
L = {
    'R': tuple(i for i, v in enumerate(S) if v == 'R'),
    'G': tuple(i for i, v in enumerate(S) if v == 'G'),
    'B': tuple(i for i, v in enumerate(S) if v == 'B')
}
R_length = len(L['R'])
G_length = len(L['G'])
B_length = len(L['B'])

ans = R_length * G_length * B_length
for i in range(N):
    for j in range(i+1, N):
        k = j + j - i
        if k >= N:
            break
        if S[i] != S[j] and S[i] != S[k] and S[j] != S[k]:
            ans -= 1
print(ans)
### BUGGY CODE ###

N,W=map(int,input().split())
waight=[0]
value=[0]
for _ in range(N):
    a,b=map(int,input().split())
    waight.append(a)
    value.append(b)
SUM_v=sum(value)
dp=[[float("inf")]*(SUM_v+1) for _ in range(N+1)]
dp[0][0]=0
ans=0
for i in range(N):
    for sum_v in range(SUM_v+1):
        dp[i+1][sum_v]=min(dp[i][sum_v],dp[i][max(0,sum_v-value[i+1])]+waight[i+1])
        if dp[i+1][sum_v]<=W:
            ans=max(ans,sum_v)
print(ans)

### FIXED CODE ###

N,W=map(int,input().split())
waight=[0]
value=[0]
for _ in range(N):
    a,b=map(int,input().split())
    waight.append(a)
    value.append(b)
SUM_v=sum(value)
dp=[[float("inf")]*(SUM_v+1) for _ in range(N+1)]
dp[0][0]=0
ans=0
for i in range(N):
    for sum_v in range(SUM_v+1):
        dp[i+1][sum_v]=min(dp[i][sum_v],dp[i][max(0,sum_v-value[i+1])]+waight[i+1])
        if dp[i+1][sum_v]<=W:
            ans=max(ans,sum_v)
print(ans)
### BUGGY CODE ###

import sys
sys.setrecursionlimit(10 ** 6)
n = int(input())

def factorization(n):
    arr = []
    ret = 1
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])
            ret = ret * (cnt+1)

    if temp!=1:
        arr.append([temp, 1])
        ret = ret*2

    if arr==[]:
        arr.append([n, 1])
        ret = ret *2

    return ret


ans = 1
if n != 1:
    for i in range(2,n+1):
        ans += i * factorization(i)

print(ans)

### FIXED CODE ###

n=int(input())
ans=0
for i in range(1,n+1): #各iについて、i*(1～n//iまでの総和)を足し合わせればよい
 k=n//i
 ans+=i*(k*(k+1)//2)
print(ans)
### BUGGY CODE ###

import sys
 
h,w=[int(x) for x in input().rstrip().split()]
l=[]
black=0
for i in range(h):
  s=[x for x in input()]
  l.append(s)

black=sum(s.count("#") for s in l)
dist=[[False for j in range(w)] for i in range(h)]
done=[[float('inf') for j in range(w)] for i in range(h)]
move=[[1,0],[-1,0],[0,1],[0,-1]]

def bfs():
  stack=[[0,0]]
  done[0][0]=0
  while(stack):
    x,y=stack.pop(0)
    dist[y][x]=True
   
    for dx,dy in move:
      mx,my=x+dx,y+dy
      if not(0<=my<=h-1) or not(0<=mx<=w-1):
        continue
      if l[my][mx]=="#" or dist[my][mx]==True:
        continue
      done[my][mx]=done[y][x]+1
      stack.append([mx,my])
    
      if my==h-1 and mx==w-1:
        return True
  return False
 
if bfs()==1:
  print(h*w-done[h-1][w-1]-black-1)
else:
  print(-1)


### FIXED CODE ###

import sys
 
h,w=[int(x) for x in input().rstrip().split()]
l=[]
black=0
for i in range(h):
  s=[x for x in input()]
  l.append(s)
  black+=sum(j.count("#") for j in s)
 
done=[[float('inf')]*w for i in range(h)]
def bfs():
  stack=[[0,0]]
  done[0][0]=0
  while(stack):
    x,y=stack.pop(0)
    move=[[x+1,y],[x-1,y],[x,y+1],[x,y-1]]
 
    for mx,my in move:
      if not(0<=my<=h-1) or not(0<=mx<=w-1) or l[my][mx]=="#" or done[my][mx]!=float('inf'):
        continue

      done[my][mx]=done[y][x]+1
      stack.append([mx,my])
      
      if my==h-1 and mx==w-1:
        print(h*w-done[my][mx]-black-1)
        sys.exit()
  print(-1)
 
if __name__=="__main__":
  bfs()