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

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on 2019/3/23
Solved on 2019/3/
@author: shinjisu
"""


# ABC 068 C - Cat Snuke and a Voyage

def getInt(): return int(input())

def getIntList(): return [int(x) for x in input().split()]

class Debug():
    def __init__(self):
        self.debug = True
 
    def off(self):
        self.debug = False
 
    def dmp(self, x, cmt=''):
        if self.debug:
            if cmt != '':
                print(cmt, ':  ', end='')
            print(x)
        return x


def prob():
    d = Debug()
    d.off()
    N, M = getIntList()
    d.dmp((N, M), 'N, M')
    ship = []
    for i in range(M):
        a, b = getIntList()
        ship.append((a, b))
    d.dmp((ship), 'ship')
    for i in range(2, N):
        if ((1, i) in ship or (i, 1) in ship) and\
             ((i, N) in ship or (N, 1) in ship):
            return 'POSSIBLE'
    return 'IMPOSSIBLE'


ans = prob()
if ans is None:
    pass
elif type(ans) == tuple and ans[0] == 1:  # 1,ans
    for elm in ans[1]:
        print(elm)
else:
    print(ans)


### FIXED CODE ###

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on 2019/3/23
Solved on 2019/3/
@author: shinjisu
"""


# ABC 068 C - Cat Snuke and a Voyage
import bisect
#import numpy as np

def getInt(): return int(input())

def getIntList(): return [int(x) for x in input().split()]
# def getIntList(): return np.array(input().split(), dtype=np.longlong)

def zeros(n): return [0]*n
# def zeros(n): return np.zeros(n, dtype=np.longlong)

def zeros2(n, m): return [zeros(m) for i in range(n)] # obsoleted zeros((n, m))で代替

class Debug():
    def __init__(self):
        self.debug = True
 
    def off(self):
        self.debug = False
 
    def dmp(self, x, cmt=''):
        if self.debug:
            if cmt != '':
                print(cmt, ':  ', end='')
            print(x)
        return x


def prob():
    d = Debug()
    d.off()
    N, M = getIntList()
    d.dmp((N, M), 'N, M')
    ship = set()
    for i in range(M):
        a, b = getIntList()
        ship.add((a, b))
    d.dmp((ship), 'ship')
    for i in range(2, N):
        if ((1, i) in ship or (i, 1) in ship) and\
             ((i, N) in ship or (N, 1) in ship):
            return 'POSSIBLE'
    return 'IMPOSSIBLE'


ans = prob()
if ans is None:
    pass
elif type(ans) == tuple and ans[0] == 1:  # 1,ans
    for elm in ans[1]:
        print(elm)
else:
    print(ans)
### BUGGY CODE ###

n = int(input())
s = []
X = list(map(int, input().split()))
for i in range(n):
    a = X[i]
    s.append(a)
    s.reverse()
for i in s:
    print(i, end = '')
    if(i!= n - 1):
        print(' ', end='')
print()

### FIXED CODE ###

n = int(input())
s = ''
X = list(map(int, input().split()))
if(len(X) % 2 == 0):
    for i in range(0, n, 2):
        s += str(X[n - 1 - i])
        s += ' '
    for i in range(0, n, 2):
        s += str(X[i])
        s += ' '
else:
    for i in range(0, n, 2):
        s += str(X[n - i - 1])
        s += ' '
    for i in range(1, n, 2):
        s += str(X[i])
        s += ' '
print(s[:-1])
### BUGGY CODE ###

from sys import stdout
printn = lambda x: stdout.write(str(x))
inn = lambda : int(input())
inl   = lambda: list(map(int, input().split()))
inm   = lambda:      map(int, input().split())
ins = lambda : input().strip()
DBG = True # and False
BIG = 999999999
R = 10**9 + 7

def ddprint(x):
  if DBG:
    print(x)

l = ins()
a = l[::-1]
n = len(l)
x = 3 if a[0]=='1' else 1
for i in range(1,n):
    if a[i]=='1':
        x = (2*x+3**i)%R
print(x)


### FIXED CODE ###

from sys import stdout
printn = lambda x: stdout.write(str(x))
inn = lambda : int(input())
inl   = lambda: list(map(int, input().split()))
inm   = lambda:      map(int, input().split())
ins = lambda : input().strip()
DBG = True # and False
BIG = 999999999
R = 10**9 + 7

def ddprint(x):
  if DBG:
    print(x)

l = ins()
a = l[::-1]
n = len(l)
x = 3 if a[0]=='1' else 1
for i in range(1,n):
    if a[i]=='1':
        x = (2*x+pow(3,i,R))%R
print(x)
### BUGGY CODE ###

n = int(input())
a = [int(input()) for i in range(n)]
pre=[]
for i in a:
  if len(pre)==0:
    pre.extend([[i]])
  else:
    flg=0
    for j in range(len(pre)):
      if pre[j][-1] < i:
        pre[j].append(i)
        flg=1
        break
    if flg==0:
      pre.extend([[i]])
print(len(pre))

### FIXED CODE ###

import bisect
n = int(input())
a = [- int(input()) for i in range(n)]
tmp = [a[0]]
for i in range(1,n):
  idx=bisect.bisect_right(tmp,a[i])
  if idx==len(tmp):
    tmp.append(a[i])
  else:
    tmp[idx] =a[i]
print(len(tmp))
### BUGGY CODE ###

A,B,C,D = map(int,input().split())

cnt = 0
for i in range(A,B+1):
    if(i%C != 0 and i%D != 0):
        cnt += 1
print(cnt)

### FIXED CODE ###

def euclid(a, b):
    while b:
        a, b = b, a%b
    return a

def multiple(a, b):
    return a*b // euclid(a, b)

A,B,C,D = map(int,input().split())

all = B - A + 1
x = B//C - (A-1)//C
y = B//D - (A-1)//D
lcm = multiple(C,D)
z = B//lcm - (A-1)//lcm

print(all - x - y + z)
### BUGGY CODE ###

from fractions import gcd
k=int(input())
c=0
for i in range(1,k+1):
    for j in range(1,k+1):
        for t in range(1,k+1):
           c+=gcd(gcd(i,j),t)
print(c)


### FIXED CODE ###

import math
K = int(input())
c = 0
for i in range(1,K+1):
  for j in range(1,K+1):
    for k in range(1,K+1):
      c += math.gcd(math.gcd(i,j),k)
print(c)
### BUGGY CODE ###

A, B, C, D, E, F = list(map(int, input().split()))
 

sugars = []
for i in range(0, F+1):
    for j in range(0, F+1):
        y = i*C + j*D
        if y <= F:
                
            sugars.append(y)
 
water = []
for i in range(0, F+1):
    for j in range(0, F+1):
        x = 100*A*i + 100*B*j
        if x <= F:
               
            water.append(x)
    
sugars.sort()
water.sort()
 

concent = 0
for x in water:
    for y in sugars:
         if x+y > F:
            break
         if x+y > 0 and y/(x+y) <= E/(100+E):
            if y/(x+y) >= concent:
                concent = y/(x+y)
                ans = "{} {}".format(x+y, y)
print(ans)

### FIXED CODE ###

A,B,C,D,E,F = map(int,input().split())
 
use_water = [] 
for i in range(0,31):
  for j in range(0,31):
    tmp = A*i + B*j
    if((tmp != 0)and(tmp <= 30)): 
      if(tmp*100 <= F):
        use_water.append(tmp)
use_water = list(set(use_water))
use_water.sort()
 
Conc = [] 
for i in range(101):
  for j in range(51):
    for k in range(len(use_water)):
      sugar = C*i + D*j
      water = use_water[k]*100
      if(sugar + water <= F):
       if(sugar <= use_water[k]*E):
        conc = sugar/(sugar + water)
        Conc.append([conc,water+sugar,sugar])
 
Conc.sort(reverse = True)
ans_water,ans_sugar = Conc[0][1],Conc[0][2]
print(ans_water,ans_sugar)
### BUGGY CODE ###

def divi(n):
    if n in prime: return 2
    sm=1
    for x in prime:
        token=0
        while n%x==0:
            n=n//x
            token+=1
        if token : sm*=(token+1)
        if n==1 : break
    return sm


n=int(input())
lst=[True for i in range(n+1)]
lst[0]=False
lst[1]=False

for i in range(2,n+1):
    if lst[i] :
        j=2*i
        while j<=n:
            lst[j]=False
            j+=i
prime=[i for i in range(n+1) if lst[i]]

sm=1
for i in range(2,n+1):
    sm+=i*divi(i)
print(sm)

### FIXED CODE ###

n=int(input())
sm=0
for i in range(1,n+1):
    sm+=i*(n//i)*(n//i+1)//2
print(sm)
### BUGGY CODE ###

def main():
  import fractions
  import math

  a,b = map(int,input().split())

  if a>b:
    a,b = b,a
  
  d = [1]
  num = 2

  while num <= min(a,b):
    if a%num == 0 and b%num == 0:
      d.append(num)
    while a%num == 0:
      a = a//num
    while b%num == 0:
      b = b//num
    num+=1
  
  print(len(d))

if __name__ == "__main__":
  main()



### FIXED CODE ###

def main():
  import fractions
  import math

  a,b = map(int,input().split())
  g = fractions.gcd(a,b)
  
  d = [1]
  num = 2

  while num**2 <= g:
    #print("num",num)
    if g%num == 0:
      d.append(num)
    while g%num == 0 and g>1:
      g = g//num
      #print(g)
    num += 1
  
  print(len(d) + (g > 1))

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

# -*- coding: utf-8 -*-
from collections import deque
d = deque()

H, W = map(int, input().split())
Ch, Cw = map(int, input().split())
Dh, Dw = map(int, input().split())
Shw = ["" for _ in range(H)]
for i in range(H):
  Shw[i] = input()

d.appendleft((Ch-1, Cw-1))
score = dict()
score[(Ch-1, Cw-1)] = 0

while len(d) > 0:
  
  here = d.popleft()
      
  # 右のマス
  if here[1] != W-1:
    if (here[0], here[1]+1) not in score or ((here[0], here[1]+1) in score and (score[(here[0], here[1]+1)] > score[here])):
      if Shw[here[0]][here[1]+1] == ".":
        d.appendleft((here[0], here[1]+1))
        score[(here[0], here[1]+1)] = score[here]

  # 下のマス
  if here[0] != H-1:
    if (here[0]+1, here[1]) not in score or ((here[0]+1, here[1]) in score and (score[(here[0]+1, here[1])] > score[here])):
      if Shw[here[0]+1][here[1]] == ".":
        d.appendleft((here[0]+1, here[1]))
        score[(here[0]+1, here[1])] = score[here]
  
  # 左のマス
  if here[1] != 0:
    if (here[0], here[1]-1) not in score or ((here[0], here[1]-1) in score and (score[(here[0], here[1]-1)] > score[here])):
      if Shw[here[0]][here[1]-1] == ".":
        d.appendleft((here[0], here[1]-1))
        score[(here[0], here[1]-1)] = score[here]
    
  # 上のマス
  if here[0] != 0:
    if (here[0]-1, here[1]) not in score or ((here[0]-1, here[1]) in score and (score[(here[0]-1, here[1])] > score[here])):
      if Shw[here[0]-1][here[1]] == ".":
        d.appendleft((here[0]-1, here[1]))
        score[(here[0]-1, here[1])] = score[here]
  
  # ワープのマス
  start_h = here[0]-2 if here[0]-2 > 0 else 0
  end_h = here[0]+3 if here[0] + 3 < H else H
  start_w = here[1]-2 if here[1]-2 > 0 else 0
  end_w = here[1]+3 if here[1] + 3 < W else W
  for i in range(start_h, end_h, 1):
    for j in range(start_w, end_w, 1):
      if j < 0 or j > W-1 or (i, j) in score:
        continue
      else:
        if Shw[i][j] == ".":
          d.append((i, j))
          score[(i, j)] = score[here] + 1

if (Dh-1, Dw-1) in score:
  print(score[(Dh-1, Dw-1)])
else:
  print(-1)

### FIXED CODE ###

# -*- coding: utf-8 -*-
from collections import deque
d = deque() # 初期化

H, W = map(int, input().split())
Ch, Cw = map(int, input().split())
Dh, Dw = map(int, input().split())
Shw = [input() for _ in range(H)]

d.appendleft((Ch-1, Cw-1, 0))
score = [[-1] * W for _ in range(H)]
score[Ch-1][Cw-1] = 0

walk = [(-1, 0), (1, 0), (0, -1), (0, 1)]
warp = list()
for i in range(-2, 3):
  for j in range(-2, 3):
    if (i, j) != (0, 0) and (i, j) not in walk:
      warp.append((i, j))

while len(d) > 0:
  
  y, x, s = d.popleft()
  
  # walk
  for i in range(len(walk)):
    dy, dx = walk[i]
    if 0 <= y+dy < H and 0 <= x+dx < W: 
      if score[y+dy][x+dx] == -1 or score[y+dy][x+dx] > s:
        if Shw[y+dy][x+dx] == ".":
          d.appendleft((y+dy, x+dx, s))
          score[y+dy][x+dx] = s
          
  # warp
  for i in range(len(warp)):
    dy, dx = warp[i]
    if 0 <= y+dy < H and 0 <= x+dx < W:
      if score[y+dy][x+dx] == -1 or score[y+dy][x+dx] > s+1:
        if Shw[y+dy][x+dx] == ".":
          d.append((y+dy, x+dx, s+1))
          score[y+dy][x+dx] = s+1

print(score[Dh-1][Dw-1])
### BUGGY CODE ###

import numpy as np
N = int(input())

def make_divisors(n):
    divisors = 0
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors += 1
            if i != n // i:
                divisors += 1
    return divisors

ans = list()
num = list()
for i in range(1,N+1):
    ans.append(make_divisors(i))
    num.append(i)
    
print(sum(np.array(ans)*np.array(num)))

### FIXED CODE ###

def solve(n):
    ans=0
    for d in range(1,n+1):
        c=n//d
        ans+=(c+1)*c//2*d
    return ans
 
n=int(input())
print(solve(n))
### BUGGY CODE ###

import sys
n = int(input())
a = [int(i) for i in input().split()]
tmp = 10**18
if 0 in a:
    print(0)
    sys.exit()
else:
    acc = 1
    for i in a:
        acc *= i
    if len(str(i)) + len(str(acc)) < 19:
        pass
    elif acc > tmp:
        print(-1)
        sys.exit()
print(acc)


### FIXED CODE ###

import sys
n = int(input())
a = [int(i) for i in input().split()]
tmp = 10**18
if 0 in a:
    print(0)
    sys.exit()
else:
    acc = 1
    for i in a:
        acc *= i
        if acc > tmp:
            print(-1)
            sys.exit()
print(acc)
### BUGGY CODE ###

def getN():
    return int(input())

def getMN():
    return list(map(int, input().split()))

def getlist():
    return list(map(int, input().split()))

MOD = 1000000007
n,m = getlist()

broken = []
for i in range(m):
    broken.append(getN())

dp = [0 for i in range(n+1)]

dp[0] = 1
if 1 not in broken:
    dp[1] = 1

for i in range(2,n+1):
    if i not in broken:
        dp[i] = dp[i-1] + dp[i-2]
        dp[i] = dp[i] % MOD

print(dp[n])

### FIXED CODE ###

def getN():
    return int(input())

def getMN():
    return list(map(int, input().split()))

def getlist():
    return list(map(int, input().split()))

MOD = 1000000007
n,m = getlist()

broken = [0 for i in range(n+1)]
for i in range(m):
    broken[getN()] = 1

dp = [0 for i in range(n+1)]

dp[0] = 1
if broken[1] == 0:
    dp[1] = 1

for i in range(2,n+1):
    if broken[i] == 0:
        dp[i] = dp[i-1] + dp[i-2]
        dp[i] = dp[i] % MOD

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

import sys
sys.setrecursionlimit(20000)

def dfs(i,x):
    ans[i]+=x
    if dist[i]==bottom:
        return
    for n in tree[i]:
        if dist[n]>dist[i]:
            dfs(n,x)

from collections import deque

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

tree=[[] for _ in range(N)]

for _ in range(N-1):
    A,B=map(int,input().split())
    tree[A-1].append(B-1)
    tree[B-1].append(A-1)

#BFSで各ノードの深さを調べる
dist = [-1]*N
que = deque([0])
dist[0] = 0
while que:
    v = que.popleft()
    d = dist[v]
    for w in tree[v]:
        if dist[w] > -1:
            continue
        dist[w] = d + 1
        que.append(w)

#カウンターをDFSで制御
ans=[0 for _ in range(N)]
bottom=max(dist)
for j in range(Q):
    p,x=map(int,input().split())
    dfs(p-1,x)

print(*ans)

### FIXED CODE ###

from collections import deque

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

tree=[[] for _ in range(N)]

for _ in range(N-1):
    A,B=map(int,input().split())
    tree[A-1].append(B-1)
    tree[B-1].append(A-1)

ans=[0 for _ in range(N)]
for j in range(Q):
    p,x=map(int,input().split())
    ans[p-1]+=x

#BFSで親のカウンターを子に継がせる
dist = [-1]*N
que = deque([0])
dist[0] = 0
while que:
    v = que.popleft()
    d = dist[v]
    for w in tree[v]:
        if dist[w] > -1:
            continue
        que.append(w)
        dist[w]=d+1
        ans[w]+=ans[v]

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

import sys

n, m, q = map(int, input().split())
sss = [input() for _ in range(n)]
dp1 = [[0] * (m + 1) for _ in range(n + 1)]
dpv = [[0] * (m + 1) for _ in range(n + 1)]
dph = [[0] * (m + 1) for _ in range(n + 1)]

for i in range(n):
    for j in range(m):
        is1 = sss[i][j] == '1'
        additional = 0

        if is1:
            dp1[i + 1][j + 1] = 1

            if i > 0 and sss[i - 1][j] == '1':
                dpv[i + 1][j + 1] = 1
            if j > 0 and sss[i][j - 1] == '1':
                dph[i + 1][j + 1] = 1

for i in range(1, n + 1):
    for j in range(1, m + 1):
        dp1[i][j] += dp1[i][j - 1]
        dpv[i][j] += dpv[i][j - 1]
        dph[i][j] += dph[i][j - 1]

for j in range(1, m + 1):
    for i in range(1, n + 1):
        dp1[i][j] += dp1[i - 1][j]
        dpv[i][j] += dpv[i - 1][j]
        dph[i][j] += dph[i - 1][j]

mp = map(int, sys.stdin.read().split())
buf = []
for x1, y1, x2, y2 in zip(mp, mp, mp, mp):
    cnt1 = dp1[x2][y2] - dp1[x1 - 1][y2] - dp1[x2][y1 - 1] + dp1[x1 - 1][y1 - 1]
    ver1 = dpv[x2][y2] - dpv[x1][y2] - dpv[x2][y1 - 1] + dpv[x1][y1 - 1]
    hor1 = dph[x2][y2] - dph[x1 - 1][y2] - dph[x2][y1] + dph[x1 - 1][y1]

    buf.append(cnt1 - ver1 - hor1)

print('\n'.join(map(str, buf)))


### FIXED CODE ###

import sys

n, m, q = map(int, input().split())
dp1 = [[0] * (m + 1) for _ in range(n + 1)]
dpv = [[0] * (m + 1) for _ in range(n + 1)]
dph = [[0] * (m + 1) for _ in range(n + 1)]

prev_s = '0' * m

for i in range(n):
    s = input()
    for j in range(m):
        is1 = s[j] == '1'
        additional = 0

        if is1:
            dp1[i + 1][j + 1] = 1

            if i > 0 and prev_s[j] == '1':
                dpv[i + 1][j + 1] = 1
            if j > 0 and s[j - 1] == '1':
                dph[i + 1][j + 1] = 1
    prev_s = s

for i in range(1, n + 1):
    for j in range(1, m + 1):
        dp1[i][j] += dp1[i][j - 1]
        dpv[i][j] += dpv[i][j - 1]
        dph[i][j] += dph[i][j - 1]

for j in range(1, m + 1):
    for i in range(1, n + 1):
        dp1[i][j] += dp1[i - 1][j]
        dpv[i][j] += dpv[i - 1][j]
        dph[i][j] += dph[i - 1][j]

mp = map(int, sys.stdin.read().split())
buf = []
for x1, y1, x2, y2 in zip(mp, mp, mp, mp):
    cnt1 = dp1[x2][y2] - dp1[x1 - 1][y2] - dp1[x2][y1 - 1] + dp1[x1 - 1][y1 - 1]
    ver1 = dpv[x2][y2] - dpv[x1][y2] - dpv[x2][y1 - 1] + dpv[x1][y1 - 1]
    hor1 = dph[x2][y2] - dph[x1 - 1][y2] - dph[x2][y1] + dph[x1 - 1][y1]

    buf.append(cnt1 - ver1 - hor1)

print('\n'.join(map(str, buf)))
### BUGGY CODE ###

from collections import Counter,defaultdict,deque
from heapq import heappop,heappush,heapify
import sys,bisect,math,itertools,fractions,pprint
sys.setrecursionlimit(10**8)
mod = 10**9+7
mod2 = 998244353
INF = float('inf')
def inp(): return int(sys.stdin.readline())
def inpl(): return list(map(int, sys.stdin.readline().split()))
def inpln(n): return list(int(sys.stdin.readline()) for i in range(n))

n,k = inpl()
g = [[] for i in range(n)]
seen = [-1]*n
for i in range(n-1):
    a,b = inpl()
    g[a-1].append(b-1)
    g[b-1].append(a-1)
def dfs(node,parent):
    cnt = 1
    st = []
    for v in g[parent]:
        if seen[v] != -1:
            cnt += 1
    seen[node] = k-cnt
    for v in g[node]:
        if seen[v] == -1:
            dfs(v,node)

seen[0] = k
for i in g[0]:
    dfs(i,0)
# print(seen)
res = 1
for x in seen:
    res *= x
    res %= mod
print(res)

### FIXED CODE ###

from collections import Counter,defaultdict,deque
from heapq import heappop,heappush,heapify
import sys,bisect,math,itertools,fractions,pprint
sys.setrecursionlimit(10**8)
mod = 10**9+7
mod2 = 998244353
INF = float('inf')
def inp(): return int(sys.stdin.readline())
def inpl(): return list(map(int, sys.stdin.readline().split()))
def inpln(n): return list(int(sys.stdin.readline()) for i in range(n))

# class Combination:
#     """
#     comb = Combination(1000000)
#     print(comb(5, 3))  # 10
#     """
#     def __init__(self, n_max, mod=10**9+7):
#         self.mod = mod
#         self.modinv = self.make_modinv_list(n_max)
#         self.fac, self.facinv = self.make_factorial_list(n_max)

#     def __call__(self, n, r):
#         return self.fac[n] * self.facinv[r] % self.mod * self.facinv[n-r] % self.mod

#     def make_factorial_list(self, n):
#         # 階乗のリストと階乗のmod逆元のリストを返す O(n)
#         # self.make_modinv_list()が先に実行されている必要がある
#         fac = [1]
#         facinv = [1]
#         for i in range(1, n+1):
#             fac.append(fac[i-1] * i % self.mod)
#             facinv.append(facinv[i-1] * self.modinv[i] % self.mod)
#         return fac, facinv

#     def make_modinv_list(self, n):
#         # 0からnまでのmod逆元のリストを返す O(n)
#         modinv = [0] * (n+1)
#         modinv[1] = 1
#         for i in range(2, n+1):
#             modinv[i] = self.mod - self.mod//i * modinv[self.mod%i] % self.mod
#         return modinv


n,k = inpl()
g = [[] for i in range(n)]
seen = [-1]*n
for i in range(n-1):
    a,b = inpl()
    g[a-1].append(b-1)
    g[b-1].append(a-1)
def p(n,i):
    count = 1
    for _ in range(i):
        count = count * n % mod
        n -= 1
    return count
def dfs(cur,par=-1):
    res = 1
    c = 0 if par == -1 else 1
    cnt = 0
    for v in g[cur]:
        if v == par:
            continue
        cnt += 1
        res *= dfs(v,cur)
        res %= mod
    return res*p(k-c-1,cnt)
print(dfs(0,-1)*k%mod)
### BUGGY CODE ###

N, b, r = list(map(int, input().split()))
str = ''
loop, cnt, bcnt = 0, 0, 0
while(cnt <= N):
  if loop%2 == 0:
    cnt += b
    bcnt += b
    if N - cnt < 0:
      bcnt += (N-cnt)
  elif loop%2 == 1:
    cnt += r
  loop += 1

print(bcnt)

### FIXED CODE ###

N, b, r = list(map(int, input().split()))
if b==0 and r==0:
  print(0)
  exit()
  
c = N//(b+r)
if N%(b+r) == 0:
  print(b*c)
else:
  if N%(b+r) <= b:
    print(c*b + N%(b+r))
  else:
    print(b*c + b)
### BUGGY CODE ###

import bisect
 
N = int(input())
Ls = list(map(int, input().split(" ")))
Ls.sort()
 
ans = 0
 
for i in range(2,N):
  for j in range(1,i):
    if 2*Ls[j] <= Ls[i]:
      continue
    ans += (len(Ls[:j]) - bisect.bisect_right(Ls[:j],Ls[i]-Ls[j]))
       
print(ans)

### FIXED CODE ###

import bisect
 
N = int(input())
Ls = list(map(int, input().split(" ")))
Ls.sort()
 
ans = 0
 
for i in range(0,N-2):
  for j in range(i+1,N-1):
    k = bisect.bisect_left(Ls,Ls[i]+Ls[j])
    ans += k - (j + 1)
       
print(ans)
### BUGGY CODE ###

import math
import sys
n,x= map(int,input().split())
a = list(map(int, sys.stdin.readline().split()))
ru = [0]*(n+1)
for i in range(1,n+1):
  ru[i] = ru[i-1]+a[i-1]
ans = float("inf")
for i in range(1,n+1):
  tmp = x*i
  l = math.ceil(n/i)
  for j in range(1,l+1):
    if ans <= tmp:
      break
    if j == 1:
        m = -i*(j+1)-1
        if m < -n:
          m = -n-1
        tmp += (ru[n]-ru[m])*5
    else:
        m = -i*(j+1)-1
        if m < -n:
          m = -n-1
        if -i*j-1 < -n:
          break
        tmp += (ru[-i*j-1]-ru[m])*(2*j+3)
  ans = min(ans,tmp)
print(ans+n*x)

### FIXED CODE ###

import math
n,x= map(int,input().split())
a = [int(_) for _ in input().split()]
ru = [0]*(n+1)
for i in range(1,n+1):
  ru[i] = ru[i-1]+a[i-1]
ans = float("inf")
for i in range(1,n+1):
  tmp = 0
  l = math.ceil(n/i)
  for j in range(1,l+1):
    if j == 1:
        m = -i*(j+1)-1
        if m < -n:
          m = -n-1
        tmp += (ru[n]-ru[m])*5
    else:
        m = -i*(j+1)-1
        if m < -n:
          m = -n-1
        if -i*j-1 < -n:
          break
        tmp += (ru[-i*j-1]-ru[m])*(2*j+3)
  tmp += x*i
  ans = min(ans,tmp)
print(ans+n*x)
### BUGGY CODE ###

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

edges = [[0 for _ in range(n+1)] for _ in range(n+1)]
for _ in range(m):
    x, y = map(int, input().split())
    edges[x][y] = 1

dp = [-1 for _ in range(n+1)]

def longest_path(u):
    if dp[u] != -1:
        return dp[u]
    d = 0
    for i in range(1, n+1):
        if edges[u][i]:
            d = max(d, 1+longest_path(i))
    dp[u] = d
    return d

for u in range(n+1):
    longest_path(u)

print(max(dp))


### FIXED CODE ###

import sys
sys.setrecursionlimit(10**5)

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

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

dp = [-1 for _ in range(n+1)]

def longest_path(u):
    if dp[u] != -1:
        return dp[u]
    d = 0
    for v in edges[u]:
        d = max(d, 1+longest_path(v))
    dp[u] = d
    return d

for u in range(1, n+1):
    longest_path(u)

print(max(dp))
### BUGGY CODE ###

import fractions

MOD = 10**9 + 7
N = int(input())
A = list(map(int, input().split()))

l = A[0]
for a in A:
  if l % a != 0:
    l = l * a // fractions.gcd(l, a)

ans = 0
for a in A:
  ans += (l//a) % MOD
  ans %= MOD

print(ans)

### FIXED CODE ###

def gcd(a, b):
    while b:
        a, b = b, a % b
    return a


def lcm(a, b):
    return a * b // gcd (a, b)


def power(n, r, mod=10**9+7):
    if r == 0: return 1
    if r%2 == 0:
        return power(n*n % mod, r//2, mod) % mod
    if r%2 == 1:
        return n * power(n, r-1, mod) % mod


MOD = 10**9 + 7
N = int(input())
A = list(map(int, input().split()))

l = A[0]
for a in A:
  t = l%a
  if t != 0:
    l = lcm(l, a)

l %= MOD
ans = 0
for a in A:
  ans += (l * power(a, MOD-2)) % MOD
  ans %= MOD

print(ans)