Harryxun/stf_run huggingface dataset:
pi = 3.141592653589793

r = int(input().rstrip().split())

a = r * r * pi

b = r * pi

print(a, b)

### FIXED CODE ###

import math

r= float(input())

a = r * r * math.pi

b = 2 * math.pi * r

print(a, b)
h,w,K=map(int,input().split())
s=[list(input())for i in range(h)]
import numpy as np
s=np.array(s)
l=[]

for i in range(h):
    l.append(len(s[i][s[i]=="#"]))
for i in range(w):
    l.append(len(s[:,i][s[:,i]=="#"]))
ss=sum(l)//2
n=h+w
ans=0
for i in range(1<<n):
    tmp=ss
    for j in range(h):
        if i>>j&1:
            tmp-=l[j]
    for j in range(h,n):
        if i>>j&1:
            tmp-=l[j]
            for idx,k in enumerate(s[:,j-h]):
                if k=="#":
                    if i>>idx&1:
                        tmp+=1
    if tmp==K:
        ans+=1
print(ans)







### FIXED CODE ###

h,w,K=map(int,input().split())
s=[list(input())for i in range(h)]
import numpy as np
s=np.array(s)
l=[]

for i in range(h):
    l.append(len(s[i][s[i]=="#"]))
for i in range(w):
    l.append(len(s[:,i][s[:,i]=="#"]))
ss=sum(l)//2
n=h+w
ans=0
for i in range(1<<n):
    tmp=ss
    for j in range(h):
        if i>>j&1:
            tmp-=l[j]
    for j in range(h,n):
        if i>>j&1:
            tmp-=l[j]
            for idx,k in enumerate(s[:,j-h]):
                if k=="#":
                    if i>>idx&1:
                        tmp+=1
    if tmp==K:
        ans+=1
print(ans)
H,W=map(int,input().split())
S=[[1 if c=='#' else 0 for c in input()] for i in range(H)]
from collections import deque
r=0
for i in range(H):
    for j in range(W):
        if S[i][j]==1:
            continue
        d=[[-1]*W for x in range(H)]
        q=deque([(i,j,0)])
        d[i][j]=0
        while q:
            x,y,d0=q.popleft()
            if x>0 and S[x-1][y]==0 and d[x-1][y]==-1:
                q.append((x-1,y,d0+1))
                d[x-1][y]=d0+1
            if y>0 and S[x][y-1]==0 and d[x][y-1]==-1:
                q.append((x,y-1,d0+1))
                d[x][y-1]=d0+1
            if x<H-1 and S[x+1][y]==0 and d[x+1][y]==-1:
                q.append((x+1,y,d0+1))
                d[x+1][y]=d0+1
            if y<W-1 and S[x][y+1]==0 and d[x][y+1]==-1:
                q.append((x,y+1,d0+1))
                d[x][y+1]=d0+1
        r=max(r,d0)
print(r)

### FIXED CODE ###

N,K=map(int,input().split())
A=sorted(map(int,input().split()))
r=0
MOD=10**9+7
max_n=10**5
fac=[1]*(max_n+1)
inv=[1]*(max_n+1)
ifac=[1]*(max_n+1)
for n in range(2,max_n+1):
    fac[n]=(fac[n-1]*n)%MOD
    inv[n]=MOD-inv[MOD%n]*(MOD//n)%MOD
    ifac[n]=(ifac[n-1]*inv[n])%MOD
def comb(n,k):
    if n<k:
        return 0
    if n<0 or k<0:
        return 0
    return (fac[n]*ifac[k]*ifac[n-k])%MOD
for i,a in enumerate(A):
    r=(r+(comb(i,K-1)-comb(N-1-i,K-1))*a)%MOD
print(r)
X, Y, Z=int(input().split())
 
print(Z, X, Y)

### FIXED CODE ###

X,Y,Z=map(int, input().split())

print(Z,X,Y)
n = int(input())


v = [int(c) for c in input().split()]
v1 = [0 for _ in range(10**5)]
v2 = [0 for _ in range(10**5)]
for i in range(n):
    if i % 2 == 0:
        v1[v[i]] += 1
    else:
        v2[v[i]] += 1

if v1.index(max(v1)) == v2.index(max(v2)):
    m1 = sorted(set(v1))[-2]
    m2 = sorted(set(v2))[-2]
    if m1 > m2:
        print(n-m1-max(v2))
    else:
        print(n-max(v1)-m2)
else:
    print(n-max(v1)-max(v2))


### FIXED CODE ###

import sys
from collections import defaultdict
input = lambda: sys.stdin.readline().rstrip()
n = int(input())
tmp = list(map(int, input().split()))
# 偶奇で分けて辞書作る
odd = defaultdict(int)
even = defaultdict(int)
for i in range(n):
    if i % 2 == 0:
        odd[tmp[i]] += 1
    else:
        even[tmp[i]] += 1

# 降順ソート
odd = sorted(odd.items(), key=lambda x: -x[1])
even = sorted(even.items(), key=lambda x: -x[1])
# 各配列の最頻，二番目を取ってくる
o1 = odd[0]
e1 = even[0]
# 1種類しかない場合は適当に二番目を作成
if len(odd) != 1:
    o2 = odd[1]
else:
    o2 = (0, 0)
if len(even) != 1:
    e2 = even[1]
else:
    e2 = (0, 0)

# 最多文字が異なる
if o1[0] != e1[0]:
    print(n - (o1[1] + e1[1]))
# 最多文字が同じ
else:
    ans = min((n - (o2[1] + e1[1])), (n - (o1[1] + e2[1])))
    print(ans)
items=list(input().split())
    T_health=int(items[0])
    T_strength=int(items[1])
    A_health=int(items[2])
    A_strength=int(items[3])
    while(T_health>0 and A_health>0):
        A_health-=T_strength
        if(A_health>0):
            T_health-=A_strength
    if(T_health<=0):
        print("No")
    if(A_health<=0):
        print("Yes")

### FIXED CODE ###

def solve():
    items=list(input().split())
    T_health=int(items[0])
    T_strength=int(items[1])
    A_health=int(items[2])
    A_strength=int(items[3])
    while(T_health>0 and A_health>0):
        A_health-=T_strength
        if(A_health>0):
            T_health-=A_strength
    if(T_health<=0):
        print("No")
    if(A_health<=0):
        print("Yes")
    return
solve()
n = int(input())
l = [[int(input()),i] for i in range(n)]
l.sort(key=lambda x:x[0])
#print(n,l)

for i in range(n):
    if l[-1][1] == i:
        print(l[-2][0])
    else:
        print(l[-1][0])

### FIXED CODE ###

n = int(input())
l = list(map(int,input().split()))
half = n//2

ans = [0]*n
for i in range(half,n):
    if l[i] == 1:
        ans[i] = 1
for i in range(0,half):
    p = half-1-i
    s = 0
    qmax = n //(p+1)
    for j in range(1,qmax+1):
        s += ans[j*(p+1)-1]
    if s%2 != l[p]:
        ans[p] = 1
print(sum(ans))
for i in range(n):
    if ans[i] == 1:
        print(i+1,end=" ")
A = int(input())
B = int(input())
if A+B >= A-B and A+B >= A*B:
  print(A+B)
elif A-B >= A+B and A-B >= A*B:
  print(A-B)
else:
  print(A*B)

### FIXED CODE ###

A,B = map(int,input().split())
print(max(A+B,A-B,A*B))
s = intput()
s.sort()
print(s[0])

### FIXED CODE ###

s = set(input())
ch = set([chr(ord('a') + i) for i in range(26)]) - s
if ch != set():
  ans = list(ch)
  ans.sort()
  print(ans[0])
else :
  print("None")
N = int(input())

hash = {}
for i in range(N):
	key = input()
	if key in hash:
		hash[key] += 1
	else:
		hash[key] = 1
        
max = 0
results = []
for i, v in hash.items():
	if max == v:
		results.append(v)
	elif max < v::
		results = [v]
        
for i in results:
	print(v)


### FIXED CODE ###

N = int(input())

hash = {}
for i in range(N):
	key = input()
	if key in hash:
		hash[key] += 1
	else:
		hash[key] = 1
        
max = 0
results = []
for i, v in hash.items():
	if max == v:
		results.append(i)
	elif max < v:
		results = [i]
		max = v

results.sort()
for i in results:
	print(i)
N, M, K = map(int, input().split())

MOD = 10**9+7
fact = [1 for i in range(N+M+1)]
for i in range(2, N*M+1):
    fact[i] = fact[i-1] * i

def comb(n, r):
    return fact[n] // fact[n-r] // fact[r]

p = comb(N*M-2, K-2)
ans = 0
for i in range(N):
    for j in range(M):
        if i == 0 and j == 0:
            continue
        d = i+j
        #print(i, j, calc_rec_num(N, M, 0, 0, i, j))
        cnt = (N-i) * (M-j)
        if i != 0 and j != 0:
            cnt *= 2
        ans += d * cnt
        #if ans > DIV:
        #    ans %= DIV
        #print(ans)

print((ans*p)%MOD)


### FIXED CODE ###

from math import factorial
N, M, K = map(int, input().split())

MOD = 10**9+7

fact = [1] * (N*M+1)
for i in range(2, N*M+1):
    fact[i] = fact[i-1] * i % MOD

def comb(n, r):
    r = n-r if n-r < r else r
    return fact[n] * pow(fact[r], MOD-2, MOD) * pow(fact[n-r], MOD-2, MOD) % MOD

p = comb(N*M-2, K-2)
ans = 0
for i in range(N):
    for j in range(M):
        if i == 0 and j == 0:
            continue
        d = i+j
        cnt = (N-i) * (M-j)
        if i != 0 and j != 0:
            cnt *= 2
        ans += d * cnt % MOD
ans = ans * p % MOD

print(ans)
N, K = map(int,input().split())
a = [0] + list(map(int,input().split()))

journey = [1]

for i in range(N):
    nxt = a[journey[-1]]
    journey.append(nxt)

if K < N:
    print(journey[K])
    exit()

loop_start = N-1
loop_end   = N

finished = False
for i in range(1,N):
    for j in range(i+1,N+1):
        if journey[i] == journey[j]:
            loop_start = i
            loop_end   = j
            finished = True
            break
    if finished:
        break

period = loop_end - loop_start

K %= period
while K < period:
  K += period

print(journey[K])


### FIXED CODE ###

N, K = map(int,input().split())
a = [0] + list(map(int,input().split()))

journey = [1]

for i in range(2*N+1000):
    nxt = a[journey[-1]]
    journey.append(nxt)

if K <= N:
    print(journey[K])
    exit()

loop_start = N-1
loop_end   = N
 
while(journey[loop_start] != journey[loop_end]):
    loop_start -= 1
    
period = loop_end - loop_start

K %= period
while K < N:
  K += period

print(journey[K])
#coding:utf-8
n1=str(input())
n2=str(input())
if(n1[0]==n2[2] and n1[2]==n2[0]):
  if(n1[1]==n2[1]):
    print("YES")
  else:
    print("NO)
else:print("NO")

### FIXED CODE ###

#coding:utf-8
n1=str(input())
n2=str(input())
if(n1[0]==n2[2] and n1[2]==n2[0]):
  if(n1[1]==n2[1]):
    print("YES")
  else:
    print("NO")
else:print("NO")
def solve():
    N, K = map(int, input().split())
    h = list(map(int, input().split()))

    dp = [float('inf')] * N
    dp[0] = 0
    for i in range(1, N):
        lst = []
        for k in range(1,i+1):
            if k > K:
                break
            lst.append(abs(h[i] - h[i-k]) + dp[i-k])
        
        dp[i] = min(*lst, dp[i])
    
    print(dp[N-1])

if __name__ == '__main__':
    solve()


### FIXED CODE ###

def solve():
    N, K = map(int, input().split())
    h = list(map(int, input().split()))

    dp = [float('inf')] * N
    dp[0] = 0
    for i in range(1, N):
        lst = []
        for k in range(1,i+1):
            if k > K:
                break
            lst.append(abs(h[i] - h[i-k]) + dp[i-k])
        
        lst.append(dp[i])
        dp[i] = min(*lst)
    
    print(dp[N-1])

if __name__ == '__main__':
    solve()
N = int(input())
S = input()
a = [int(S[i]) for i in range(N)]

from collections import Counter

b = [abs(a[i+1]-a[i]) for i in range(N-1)]
c = Counter(b)
if c[1] == 0 and c[2]==1 and (b[0] ==2 or b[-1] ==2):
  print(2)
elif c[1] == 0 and c[0]==1 and (b[0] ==0 or a[-1] ==0):
  print(2)
else:
  if N == 2:
    print(abs(a[0]-a[1]))
  else:
    a = [abs(a[i+1]-a[i]) for i in range(N-1)]
    cd = Counter(a[1:-1])
    cde = Counter(a[0:1] + a[-1:])
    if ((cd[1] * 2) + cde[1])%2 ==1:
      print(1)
    else:
      print(0)
print(cde)

### FIXED CODE ###

N = int(input())
S = input()
a = [int(s)-1 for s in S]


from collections import defaultdict

r = 1
d = defaultdict(int)
while 2**r  <= N:
  for i in range(1,N):
    if i*(2**r) <= N:
      d[i*(2**r)] += 1
    else:
      break
  r+=1

def calc(list_of_int):
  # 1と0で構成されているとする
  length = len(list_of_int)
  res = list_of_int[0]
  
  keisu = 0
  for i,r in zip(list_of_int[1:], range(N-1)):
    keisu += d[N-r-1]-d[r+1]
    res = (res + ((2 if keisu>0 else 1)*i) )% 2
  return res

if 1 in a:
  print(calc(a))
else:
  print(calc(list(map(lambda x:x//2,a)))*2)
#intの場合
N = int(input()) #ここで標準入力

A = list(map(int, input().split()))

# multiple = 1
# for i in range(N):
#     multiple *= A[i]



# if multiple <= 10 ** 18 :
#     print(multiple)
# else:
#     print(-1)


if 0 in A:
    print(0)
    return

output = 1
for a in A:
    output *= a
    
    if output > 10 ** 18:
        print(-1)
        return

print(output)


### FIXED CODE ###

#intの場合
N = int(input()) #ここで標準入力

A = list(map(int, input().split()))

# multiple = 1
# for i in range(N):
#     multiple *= A[i]



# if multiple <= 10 ** 18 :
#     print(multiple)
# else:
#     print(-1)

def main():
    if 0 in A:
        print(0)
        return

    output = 1
    for a in A:
        output *= a

        if output > (10 ** 18):
            print(-1)
            return

    print(output)

main()
N = int(input())
X = list(input())
X = [int(x) for x in X]
X.reverse()

def popcnt0(n):
    c = 0
    for i in range(64):
        c += (n >> i) & 1
    return c
  
#最初にNまでの表を作る
D = [0 for _ in range(N+1)]
D[1] = 1
for i in range(2, N+1):
  D[i] = D[i % popcnt0(i)] + 1
  
#次に、Xの１のカウントを求める
ct_1 = 0
for x in X:
  if x == 1:
    ct_1 += 1

#ct_1-1による2^n mod
B = [0 for _ in range(N)]
j = 1
for i in range(N):
  B[i] = j
  j *= 2
  j %= ct_1 - 1 
  
#ct_1+1による2^n mod
C = [0 for _ in range(N)]
j = 1
for i in range(N):
  C[i] = j
  j *= 2
  j %= ct_1 + 1 

#X mod ct_1-1 と、X mod ct_1+1 を求める
s = 0
t = 0
for i in range(N):
  s += X[i] * B[i]
  t += X[i] * C[i]
  s %= ct_1-1
  t %= ct_1+1

X.reverse()
print(X)
#print(D,B,C)
i = N-1
#各場合の1回目の操作後の数を計算して、Dをつかって答えを出す
for x in X:
  if x == 1:
    k = (s - B[i]) % (ct_1-1)
  else:
    k = (t + C[i]) % (ct_1+1)
  i -= 1
  print(D[k]+1)
 

  
  
  

### FIXED CODE ###

N = int(input())
X = list(input())
X = [int(x) for x in X]
X.reverse()

def popcnt0(n):
    c = 0
    for i in range(64):
        c += (n >> i) & 1
    return c
  
#最初にNまでの表を作る
D = [0 for _ in range(N+1)]
D[1] = 1
for i in range(2, N+1):
  D[i] = D[i % popcnt0(i)] + 1
  
#次に、Xの１のカウントを求める
ct_1 = 0
for x in X:
  if x == 1:
    ct_1 += 1

#ct_1-1による2^n mod
if ct_1 > 1:
  B = [0 for _ in range(N)]
  j = 1
  for i in range(N):
    B[i] = j
    j *= 2
    j %= ct_1 - 1 


#ct_1+1による2^n mod
C = [0 for _ in range(N)]
j = 1
for i in range(N):
  C[i] = j
  j *= 2
  j %= ct_1 + 1 

#X mod ct_1-1 と、X mod ct_1+1 を求める
s = 0
t = 0
for i in range(N):
  if ct_1 > 1:
    s += X[i] * B[i]
    s %= ct_1-1
  t += X[i] * C[i] 
  t %= ct_1+1

X.reverse()
#print(X)
#print(D,B,C)
i = N-1
#各場合の1回目の操作後の数を計算して、Dをつかって答えを出す
for x in X:
  if x == 1:
    if ct_1 > 1:
      k = (s - B[i]) % (ct_1-1)
    else:
      print(0)
  else:
    k = (t + C[i]) % (ct_1+1)        
  i -= 1
  if ct_1 > 1 or x == 0:
    print(D[k]+1)
n,m=map(int,input().split())
a=[]
for i in range(m):
  a.append(int(input()))
f=[0]*100001
f[0]=0
f[1]=1
f[2]=2
for i in range(3,100001):
  f[i]=f[i-1]+f[i-2]
ans=max(f[a[0]-1],1)
for j in range(m-1):
  ans*=f[a[j+1]-a[j]-2]
print((ans*max(1,f[n-a[-1]-1]))%1000000007)

### FIXED CODE ###

n,m=map(int,input().split())
a=set([int(input()) for i in range(m)])
mod=1000000007
dp=[1,1]
if 1 in a:
  dp[1]=0
for i in range(2,n+1):
  if i in a:
    dp.append(0)
  else:
    dp.append((dp[-1]+dp[-2])%mod)
print(dp[-1]%mod)
d, n = map(int, input().split())

if (n != 100):
	if (d == 0):
      print(n)
    else:
      print(100**d*n)
else:
  if (d == 0):
    print(101)
  else:
    print(100**d*101)


### FIXED CODE ###

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

if (n != 100):
  if (d == 0):
    print(n)
  else:
    print(100**d*n)
else:
  if (d == 0):
    print("101")
  else:
    print((100**d)*101)
N, M = map(int, input().split())
lis = [0]*N
SC = []
ERROR = False
for _ in range(N):
  sc = list(map(int, input().split()))
  SC.append(sc)
for i in range(len(SC)-1):
  for j in range(i+1,len(SC)):
    if SC[i][0] == SC[j][0] and SC[i][1] != SC[j][1]:
      ERROR = True
if ERROR:
  print('-1')
else:
  output = ''
  for i in range(len(SC)):
    lis[SC[i][0]-1] = SC[i][1]
  for i in range(N):
    output += str(lis[i])
  if lis[0] == '0':
    print('-1')
  else:
    print(output)

### FIXED CODE ###

N, M = map(int, input().split())
lis = [0]*N
SC = []
ERROR = False
for _ in range(M):
  sc = list(map(int, input().split()))
  SC.append(sc)
for i in range(len(SC)-1):
  for j in range(i+1,len(SC)):
    if SC[i][0] == SC[j][0] and SC[i][1] != SC[j][1]:
      ERROR = True
for i in range(len(SC)):
  if N > 1 and SC[i][0] == 1 and SC[i][1] == 0:
    ERROR = True
if ERROR:
  print(-1)
else:
  output = ''
  for i in range(M):
    lis[SC[i][0]-1] = SC[i][1]
  if N > 1 and lis[0] == 0:
    lis[0] = 1
  for i in range(N):
    output += str(lis[i])
  print(int(output))
n,m,k=map(int,input().split())
a = list(input().split())
a = [int(i) for i in a]
b = list(input().split())
b = [int(i) for i in b]
aa=a.copy()
aa.extend(b)
if sum(aa)<=k:
  print(n+m)
  exit()

#print(aa)
ai,bi=0,0
ans=0
for _ in range(n+m):
  #print(k, a[ai], b[bi], ai,bi)
  if k<= a[ai] and k<= b[bi]:
    print(ans)
    exit()
    
  if a[ai] <= b[bi]:
    k-=a[ai]
    ai+=1
    ans+=1
  else:
    k-=b[bi]
    bi+=1
    ans+=1
    
  if ai == len(a):
    a=[10*10]*10000
  if bi == len(b):
    b=[10*10]*10000
    
print(ans)

### FIXED CODE ###

N, M, K = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))

a, b = [0], [0]
for i in range(N):
  a.append(a[i] + A[i])
for i in range(M):
  b.append(b[i] + B[i])

ans, j = 0, M
for i in range(N + 1):
  if a[i] > K:
    break
  while b[j] > K - a[i]:
    #print(b[j],K - a[i])
    j -= 1
  ans = max(ans, i + j)
  #print("ans",ans)
print(ans)
N = int( input() )

L = list(range(1,N+1))



if len(L)==1:
    print(L[0]%1)

elif len(L)==2:
    print(L[0]%2)

elif L[len(L)-1] % 2 == 0:
    print(sum(L[1:len(L)-1]))

else:
    print(sum(L[1:len(L)-1])+1)


### FIXED CODE ###

N = int(input())
print( (N *(N-1)) // 2 )
import collections
n = int(input())
*a, = map(int, input().split())
counter = collections.Counter(a)
d = {}
for key, value in counter.items():
    d[key] = (value * (value - 1)) // 2

sum_d = {}
for k in range(n):
    if a[k] not in sum_d:
        if d[a[k]] > 0: tmp = ((counter[a[k]] - 1) * (counter[a[k]] - 2)) // 2
        sum_d[a[k]] = sum(d.values())  - d[a[k]] + tmp
        print(sum_d[a[k]])
    else:
        print(sum_d[a[k]])

### FIXED CODE ###

import collections
n = int(input())
*a, = map(int, input().split())
counter = collections.Counter(a)
d = {key: (value * (value - 1)) // 2 for key, value in counter.items()}
#print(d)
all_sum = sum(d.values())
#print(all_sum)

sum_d = {}
for k in range(n):
    if a[k] not in sum_d:
        if d[a[k]] > 0:
            tmp = ((counter[a[k]] - 1) * (counter[a[k]] - 2)) // 2
            sum_d[a[k]] = all_sum  - d[a[k]] + tmp
            print(sum_d[a[k]])
        else:
            print(all_sum)
    else:
        print(sum_d[a[k]])
\import sys
input=sys.stdin.readline
N,M=map(int,input().split())
from collections import defaultdict
OUT=defaultdict(set)
IN=defaultdict(set)
start={i for i in range(N)}
for i in range(N+M-1):
    a,b=map(int,input().split())
    start-={b-1}
    OUT[a-1]|={(i,b-1)}
    IN[b-1]|={i}
P=[0]*N
while len(start)>0:
    now=start.pop()
    for b,nex in OUT[now]:
        IN[nex].remove(b)
        if not IN[nex]:
            start|={nex}
            P[nex]=now+1
for p in P:
    print(p)

### FIXED CODE ###

import sys
input=sys.stdin.readline
N,M=map(int,input().split())
from collections import defaultdict
OUT=defaultdict(set)
IN=defaultdict(int)
for i in range(N+M-1):
    a,b=map(int,input().split())
    OUT[a-1]|={b-1}
    IN[b-1]+=1
P=[0]*N
start={i for i in range(N) if IN[i]==0}
while len(start)>0:
    now=start.pop()
    for nex in OUT[now]:
        IN[nex]-=1
        if IN[nex]==0:
            start|={nex}
            P[nex]=now+1
[print(p) for p in P]
S=str(input())
if len(S)<4:
  print(0)
else:
  t=0
  for i in range(N-3):
    for j in range(i+3,N):
      if int(S[i:j])%2019==0:
        t+=1
  print(t)

### FIXED CODE ###

S=input()
N=len(S)
Slis=[]
for i in range(N):
  Slis+=[int(S[i])]
T=[0 for i in range(N+1)]#T[i]はi桁より右側の数字


ten=1

for i in range(N):
  T[N-i-1]=(T[N-i]+ten*Slis[N-i-1])%2019
  ten=(ten*10)%2019

MOD=[0 for i in range(2019)]
for i in range(N+1):
  tmp=T[i]%2019
  MOD[tmp]+=1


  
ans=0

for i in range(2019):
  tmp=MOD[i]
  ans+=tmp*(tmp-1)//2
print(ans)
a,b,x = map(int,input().split())
if a == 0:
  ans = b//x + 1
else:
  ans = b//x - a//x
  if a%x == 0:
    ams += 1
print(ans)

### FIXED CODE ###

a,x,c = input().split()
X = x[0]
list = ['A',X,'C']
ans = ''.join(list)
print(ans)
N,X = map(int,input().split())
l = list(map(int,input().split()))
d = preD = 0
i = 0
while d <= X:
    d = preD + l[i]
    i += 1
    preD = d
print(i)

### FIXED CODE ###

N,X = map(int,input().split())
l = list(map(int,input().split()))
#print(l)
d = preD = 0
i = 0
for i in range(N):
    d = preD + l[i]
    preD = d
    #print(i+1,d)
    if d == X:
        print(i+2)
        break
    elif d > X:
        print(i+1)
        break
else:
    print(N+1)
from heapq import heapify, heappop, heappush
N=int(input())
A=list(map(int, input().split()))

class MaxHeap:
    def __init__(self, li):
        self.hp = []
        for e in li:
            heappush(self.hp, -e)

    def push(self, x):
        heappush(self.hp, -x)

    def pop(self):
        ret = heappop(self.hp)
        ret *= -1
        return ret

    def seak(self):
        return -self.hp[0]

    def sum(self):
        return -sum(self.hp)

A1=A[:N]
A2=A[N:2*N]
A3=A[2*N:]

heapify(A1)
A1_sum=sum(A1)
A1_li=[A1_sum]
for a in A2:
  heappush(A1, a)
  p=heappop(A1)
  A1_sum+=a-p
  A1_li.append(A1_sum)
  
A3=MaxHeap(A3)
A3_sum=sum(A3)
A3_li=[A3_sum]
for a in A3[::-1]:
  A3.push(a)
  A3_sum+=a
  p=A3.pop()
  A3_sum-=p
  A3_li.append(A3_sum)
  
A3_li=A3_li[::-1]  
ans=False
for a1, a3 in zip(A1_li, A3_li):
  if not ans:
    ans=a1-a3
  else:
    ans=max(ans, a1-a3)
print(ans)

### FIXED CODE ###

from heapq import heapify, heappop, heappush
N=int(input())
A=list(map(int, input().split()))

class MaxHeap:
    def __init__(self, li):
        self.hp = []
        for e in li:
            heappush(self.hp, -e)

    def push(self, x):
        heappush(self.hp, -x)

    def pop(self):
        ret = heappop(self.hp)
        ret *= -1
        return ret

    def seak(self):
        return -self.hp[0]

    def sum(self):
        return -sum(self.hp)

A1=A[:N]
A2=A[N:2*N]
A3=A[2*N:]

heapify(A1)
A1_sum=sum(A1)
A1_li=[A1_sum]
for a in A2:
  heappush(A1, a)
  p=heappop(A1)
  A1_sum+=a-p
  A1_li.append(A1_sum)
  
A3_sum=sum(A3)
A3=MaxHeap(A3)

A3_li=[A3_sum]
for a in A2[::-1]:
  A3.push(a)
  A3_sum+=a
  p=A3.pop()
  A3_sum-=p
  A3_li.append(A3_sum)
  
A3_li=A3_li[::-1]  
ans=False
for a1, a3 in zip(A1_li, A3_li):
  if not ans:
    ans=a1-a3
  else:
    ans=max(ans, a1-a3)
print(ans)
a = input()
print(a % 1000)

### FIXED CODE ###

a = int(input())

if a % 1000 == 0:
  out = 0
else:
  out = 1000 - a % 1000

print(out)
N = int(input())
A = list(map(int, input().split()))


def solve(i, s, k, plus):
    if i == N:
        return k

    if plus:
        if s + A[i] <= 0:
            return solve(i + 1, 1, k + abs(s + A[i]) + 1, False)
        else:
            return solve(i + 1, s + A[i], k, False)
    else:
        if s + A[i] >= 0:
            return solve(i + 1, -1, k + abs(s + A[i]) + 1, True)
        else:
            return solve(i + 1, s + A[i], k, True)


print(min(solve(0, 0, 0, True), solve(0, 0, 0, False)))


### FIXED CODE ###

_ = int(input())
A = list(map(int, input().split()))

ret = float('inf')

sign = 1
s = 0
k = 0
for a in A:
    if sign * (s + a) > 0:
        s += a
    else:
        k += abs(s + a) + 1
        s = sign
    sign *= -1
ret = min(ret, k)

sign = -1
s = 0
k = 0
for a in A:
    if sign * (s + a) > 0:
        s += a
    else:
        k += abs(s + a) + 1
        s = sign
    sign *= -1

ret = min(ret, k)


print(ret)
n = int(input())

if n[-1] == 3:
    print("bon")
elif n[-1] == 0 or n[-1] == 1 n[-1] == 6 n[-1] == 8:
    print("pon")
else:
    print("hon")

### FIXED CODE ###

n = input()

if n[-1] == "3":
    print("bon")
elif n[-1] == "0" or n[-1] == "1" or n[-1] == "6" or n[-1] == "8":
    print("pon")
else:
    print("hon")
a, b = map(int,input().split())
if (a*b)%2==0:
	return("Even")
return("Odd")

### FIXED CODE ###

a, b = map(int,input().split())
if(a*b)%2==0:
	print("Even")
else:
	print("Odd")
n = int( input())
a = sorted(  list(map(int, input().split())) , reverse)
print((sum(a[::2])-sum(a[1::2]))

### FIXED CODE ###

input()
card=sorted(map(int,input().split()))[::-1]
print(sum(card[::2])-sum(card[1::2]))