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

import numpy as np

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

members = np.array([-1] * N).astype(np.int)

group_count = 0
groups = [0] * N
group_dict = {}
for m in range(M):
    A, B = map(int, input().split())
    A = A - 1
    B = B - 1
    if members[A]==-1 and members[B]==-1:
        members[A] = members[B] = group_count
        groups[group_count] = 2
        group_dict[group_count] = [A, B]
        group_count += 1
    
    elif members[A]!=-1 and members[B]==-1:
        members[B] = members[A]
        groups[members[A]] += 1
        group_dict[members[A]].append(B)
    
    elif members[B]!=-1 and members[A]==-1:
        members[A] = members[B]
        groups[members[B]] += 1
        group_dict[members[B]].append(A)
    
    else:
        if members[A] != members[B]:
            old = members[B]
            groups[members[A]] += groups[members[B]]
            groups[members[B]] = 0
            group_dict[members[A]] = group_dict[members[A]] +  group_dict[members[B]]
            members[group_dict[members[B]]] = members[A]
            group_dict[old] = []
        
ans = max(groups)
if ans == 0:
    print(1)
else:
    print(ans)

### FIXED CODE ###

class UnionFind:
    def __init__(self, N):
        self.parent = list(range(N))
        self.rank = [0] * N
        self.size = [1] * N

    def find(self, x):
        r = x
        while self.parent[r] != r:
            r = self.parent[r]
        while self.parent[x] != r:
            x, self.parent[x] = self.parent[x], r
        return r

    def unite(self, x, y):
        x = self.find(x)
        y = self.find(y)
        if x == y:
            return
        if self.rank[x] < self.rank[y]:
            self.parent[x] = y
            self.size[y] += self.size[x]
        else:
            self.parent[y] = x
            self.size[x] += self.size[y]
            if self.rank[x] == self.rank[y]:
                self.rank[x] += 1

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def get_size(self, x):
        return self.size[self.find(x)]

N, M = map(int, input().split())
uf = UnionFind(N)
for _ in range(M):
    A, B = map(int, input().split())
    uf.unite(A-1, B-1)

ans = max(uf.get_size(i) for i in range(N))
print(ans)
### BUGGY CODE ###


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

M = 0
ans_lst = [0] * N

t = 0
for i in range(N-1, -1, -1):
    t = sum(ans_lst[i::i+1])
        
    if t % 2 != a_lst[i]:
        ans_lst[i] = 1
    


m = 0
for i in range(N):
    m += ans_lst[i]
    


print(m)
ans_str = ""
for i in range(N):
    if ans_lst[i] == 1:
        ans_str += str(i+1) + " "
print(ans_str)




### FIXED CODE ###


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

M = 0
ans_lst = [0] * N

for i in range(N-1, -1, -1):
    if sum(ans_lst[i::i+1]) % 2 != a_lst[i]:
        ans_lst[i] = 1
    

m = sum(ans_lst)    


print(m)
ans_str = ""
for i in range(N):
    if ans_lst[i] == 1:
        ans_str += str(i+1) + " "
print(ans_str)
### BUGGY CODE ###

from collections import deque
def main():
    s = deque(input())
    q = int(input())
    appendleft=s.appendleft
    append=s.append
    flag = False
    for i in range(q):
        temp = input().split()
        if temp[0] == "1":
            flag = not flag
        else:
            if flag:
                s.reverse()
                flag = False
            if temp[1] == "1":
                appendleft(temp[2])
            else:
                append(temp[2])
    if flag:
        s.reverse()
    print("".join(list(s)))
if __name__=="__main__":
    main()


### FIXED CODE ###

from collections import deque
def main():
    s = deque(input())
    q = int(input())
    appendleft=s.appendleft
    append=s.append
    flag = False
    for i in range(q):
        temp = input().split()
        if temp[0] == "1":
            flag = not flag
        else:
            if temp[1] == "1":
                if flag:
                    append(temp[2])
                else:
                    appendleft(temp[2])
            else:
                if flag:
                    appendleft(temp[2])
                else:
                    append(temp[2])
    if flag:
        s.reverse()
    print("".join(list(s)))
if __name__=="__main__":
    main()
### BUGGY CODE ###

from fractions import gcd
import time
n = int(input())
a = list(map(int, input().split()))
t1 = time.time()
mod = 10**9+7
def modinv(a, mod=10**9+7):
    return pow(a, mod-2, mod)
g = 1
flag = 1
for i in range(n):
    g = a[i] * g // gcd(a[i], g)
    #g %= mod
    t2 = time.time()
    if t2 - t1 > 1:
        flag = 0
        break

if flag == 1:
    ans = 0
    for i in range(n):
        ans += g * modinv(a[i])
        ans %= mod
    print(ans)

else:
    ans = 0

    for i in range(n):
        g = 1
        for j in range(n):
            if i == j:
                continue
            else:
                g *= a[j]
                g %= mod
        ans += g
    print(ans%mod)


### FIXED CODE ###

from fractions import gcd #直して
n = int(input())
a = list(map(int, input().split()))

mod = 10**9+7
l = 1
for i in range(n):
    l = a[i] // gcd(l, a[i]) * l
    

def modinv(a, mod=10**9+7):
    return pow(a, mod-2, mod)

d = 0
for i in range(n):
    d += modinv(a[i])

print((l*d) % mod)
### BUGGY CODE ###

import math

K = int(input())
ans = 0
for i in range(1, K + 1):
    for j in range(1, K + 1):
        for k in range(1, K + 1):
            ans += math.gcd(math.gcd(i, j),k)


print(ans)

### FIXED CODE ###

import math

K = int(input())
# for K in range(201):
#     ans = 0
#     for i in range(1, K + 1):
#         for j in range(1, K + 1):
#             for k in range(1, K + 1):
#                 ans += math.gcd(math.gcd(i, j),k)
#     print(ans,end=',')

print([0,1,9,30,76,141,267,400,624,885,1249,1590,2208,2689,3411,4248,5248,6081,7485,8530,10248,11889,13687,15228,17988,20053,22569,25242,28588,31053,35463,38284,42540,46581,50893,55362,61824,65857,71247,76884,84388,89349,97881,103342,111528,120141,128047,134580,146316,154177,164817,174438,185836,194157,207927,218812,233268,245277,257857,268182,288216,299257,313635,330204,347836,362973,383709,397042,416448,434025,456967,471948,499740,515581,536073,559758,583960,604833,633651,652216,683712,709065,734233,754734,793188,818917,846603,874512,909496,933081,977145,1006126,1041504,1073385,1106467,1138536,1187112,1215145,1255101,1295142,1342852,1373253,1422195,1453816,1502376,1553361,1595437,1629570,1691292,1726717,1782111,1827492,1887772,1925853,1986837,2033674,2089776,2145333,2197483,2246640,2332104,2379085,2434833,2490534,2554600,2609625,2693919,2742052,2813988,2875245,2952085,3003306,3096024,3157249,3224511,3306240,3388576,3444609,3533637,3591322,3693924,3767085,3842623,3912324,4027884,4102093,4181949,4270422,4361548,4427853,4548003,4616104,4718640,4812789,4918561,5003286,5131848,5205481,5299011,5392008,5521384,5610705,5739009,5818390,5930196,6052893,6156139,6239472,6402720,6493681,6623853,6741078,6864016,6953457,7094451,7215016,7359936,7475145,7593865,7689630,7886244,7984165,8130747,8253888,8403448,8523897,8684853,8802826,8949612,9105537,9267595,9376656,9574704,9686065,9827097,9997134,10174780,10290813,10493367,10611772,10813692]
      [K])
### BUGGY CODE ###

n,m=map(int,input().split())
a=list(map(int, input().split()))
while m:
	i = a.index(max(a))
	a[i]//=2
	m -= 1
print(sum(a))

### FIXED CODE ###

import heapq

n, m = map(int, input().split())
lis = []

for i in input().split():
  heapq.heappush(lis, -int(i))

for j in range(m):
  tmp = -heapq.heappop(lis)
  heapq.heappush(lis, -int((tmp/2)))

print(-sum(lis))
### BUGGY CODE ###

N = int(input())
s = input()
l = []
c = 0
ans = 10**6

if s.count("#")==0:
    print(0)
else:
    for i in range(N):
        if s[i] == "#":
            l.append(c + s[i:N+1].count("."))
            c += 1
    print(min(l))

        



### FIXED CODE ###

N = int(input())
s = input()
l = []
b = 0
w = s.count(".")

for i in range(N):
    if s[i] == "#":
        l.append(b+w)
        b += 1
    else:
        w -= 1
        l.append(b+w)
print(min(l))
### BUGGY CODE ###

#!/usr/bin/env python3
import sys
sys.setrecursionlimit(10000)
INF = 1<<32


def solve(N: int, M: int, A: "List[int]", B: "List[int]", C: "List[int]"):
    import heapq

    heapq.heapify(A)

    for i in range(M):
        for j in range(B[i]):
            a = heapq.heappop(A)
            if(a < C[i]):
                heapq.heappush(A, C[i])
            else:
                heapq.heappush(A, a)
    
    print(sum(A))

    return



def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    M = int(next(tokens))  # type: int
    A = [int(next(tokens)) for _ in range(N)]  # type: "List[int]"
    B = [int()] * (M)  # type: "List[int]"
    C = [int()] * (M)  # type: "List[int]"
    for i in range(M):
        B[i] = int(next(tokens))
        C[i] = int(next(tokens))
    solve(N, M, A, B, C)

if __name__ == '__main__':
    main()


### FIXED CODE ###

#!/usr/bin/env python3
import sys


def solve(N: int, M: int, A: "List[int]", B: "List[int]", C: "List[int]"):
    x = [[B[i],C[i]] for i in range(M)]
    x = sorted(x, key=lambda x: -x[1])

    A.sort()

    dn = 0
    for b, c in x:
        for j in range(b):
            if(dn >= N):
                break
            if(A[dn] < c):
                A[dn] = c
                dn += 1
            else:
                break


    print(sum(A))

    return


# Generated by 1.1.4 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can remove this line by using your custom template)
def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    N = int(next(tokens))  # type: int
    M = int(next(tokens))  # type: int
    A = [ int(next(tokens)) for _ in range(N) ]  # type: "List[int]"
    B = [int()] * (M)  # type: "List[int]" 
    C = [int()] * (M)  # type: "List[int]" 
    for i in range(M):
        B[i] = int(next(tokens))
        C[i] = int(next(tokens))
    solve(N, M, A, B, C)

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

import numpy as np

import sys
input = sys.stdin.readline

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

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

Jump = [None] * (n)
Jump[0] = 1
next = 0
for i in range(n):
    to = A[next]
    if to in Jump:
        start = Jump.index(to)
        end = i
        dis = end - start + 1

        roop = (k-start) % dis +1
        if roop == 0:
            print(Jump[end])
            break
        else:
            print(Jump[start+roop-1])
            break

    else:
        Jump[i+1] = to
        next = to-1
    if i ==k-1:
        print(to)
        break


### FIXED CODE ###

n, k = map(int, input().split())
A = [int(a) for a in input().split()]
Jump = [None] * n
Jump[0] = 1
Rireki = [-1] * (n+1)
Rireki[0] = 0
next = 0
for i in range(1,n+1):
    to = A[next]

    if Rireki[to] >= 0:
        start = Jump.index(to)
        end = i
        dis = end - start

        roop = (k-start) % dis
        print(Jump[start+roop])
        break
    Rireki[to] = i
    Jump[i] = to
    next = to-1
    if i ==k:
        print(to)
        break
### BUGGY CODE ###

n = int(input())
S = []
for i in range(n):
  S.append(input())
T = list(set(S))
count = []
for i in range(len(T)):
  count.append(S.count(T[i]))
best = max(count)
ans = []
for i in range(len(T)):
  if count[i] == best:
    ans.append( T[i])
ans = sorted(ans)
for i in range(len(ans)):
  print(ans[i]) 

### FIXED CODE ###

from collections import Counter
n = int(input())
S = []
for i in range(n):
  S.append(input())
S = sorted(S)
c = Counter(S)
X = c.most_common()
A = []
for i in range(len(X)):
  if X[0][1] == X[i][1]:
    A.append(X[i][0])
  else:
    break
A = sorted(A)
for i in range(len(A)):
  print(A[i])
### BUGGY CODE ###

from itertools import*;n=int(input());i=input();print(sum(len(f)==len(set(f))for g in[combinations(i,r)for r in range(1,n+1)]for f in g))

### FIXED CODE ###

from collections import*
n=int(input())
ans=1
for i in Counter(input()).values():
    ans*=(i+1)
print((ans-1)%(10**9+7))
### BUGGY CODE ###

import heapq
import itertools
n, m, r = map(int, input().split())
r = list(map(lambda x:int(x)-1, input().split()))
graph = [[] for _ in range(n)]
for _ in range(m):
  a, b, c = map(int, input().split())
  a -= 1
  b -= 1 
  graph[a] += [[b, c]]
  graph[b] += [[a, c]]

def dijkstra(s):
  dist = [float('inf')]*n
  dist[s] = 0
  q = [[0, s]]
  heapq.heapify(q)
  while q:
    c, u = heapq.heappop(q)
    if dist[u] < c:
      continue
    for v, weight in graph[u]:
      if dist[v] > dist[u] + weight:
        dist[v] = dist[u] + weight
        heapq.heappush(q, [dist[v], v])
  return dist

ans = float('inf')
for v in itertools.permutations(r):
  tmp = 0
  for i in range(len(v)-1):
    tmp += dijkstra(v[i])[v[i+1]]
  ans = min(ans, tmp)

print(ans)


### FIXED CODE ###

import itertools
n, m, r = map(int, input().split())
d = [[float('inf')]*n for _ in range(n)]
rs = list(map(int, input().split()))
for _ in range(m):
  a, b, t = map(int, input().split())
  a -= 1
  b -= 1
  d[a][b] = t
  d[b][a] = t
for i in range(n):
  d[i][i] = 0

def warshall_floyd(d):
  #d[i][j]: iからjへの最短距離
  for k in range(n):
    for i in range(n):
      for j in range(n):
        d[i][j] = min(d[i][j],d[i][k] + d[k][j])
  return d 

d = warshall_floyd(d)
ans = float('inf')
for p in itertools.permutations(rs):
  tmp = 0
  for i in range(len(p)-1):
    tmp += d[p[i]-1][p[i+1]-1]
  ans = min(ans, tmp)

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

def main():
    N,K=map(int,open(0).read().split())
    keta=1
    flag=0
    while flag==0:
        if K**keta<=N and K**(keta+1)>N:
            flag=1
        keta= keta+1
        #print(keta)

    print(keta)
main()

### FIXED CODE ###

def Base_10_to_n(X, n):
    X_dumy = X
    out = ''
    while X_dumy>0:
        out = str(X_dumy%n)+out
        X_dumy = int(X_dumy/n)
    return out
    
def main():
    N,K=map(int,input().split())
    print(len(Base_10_to_n(N,K)))
main()
### BUGGY CODE ###


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

dp = [[0] * (N) for _ in range(N+1)]
ans = int(0)
for i in range(N):
    dp[i][i] = a[i]

#for l in range(1,N)
for l in range(1,N):
    for i in range(N-l):
        j = i + l
        dp[i][j] = max(dp[i][i]-dp[i+1][j], dp[j][j]-dp[i][j-1])


ans = dp[0][N-1]

print(ans)
#print(dp)

### FIXED CODE ###


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

dp = [[0] * (N) for _ in range(N+1)]
ans = int(0)
for i in range(N):
    dp[i][i] = a[i]

#for l in range(1,N)
for l in range(1,N):
    for i in range(N-l):
        j = i + l
        dp[i][j] = max(dp[i][i]-dp[i+1][j], dp[j][j]-dp[i][j-1])


ans = dp[0][N-1]

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

n = int(input())
li = list(str(input()) for i in range(n))
gou = []
for g in range(len(li)):
    lis = []
    moji = ""
    for k in range(len(li[g])):
        lis.append(li[g][k])
    lis.sort()
    for m in range(len(lis)):
        moji += lis[m]
    gou.append(moji)
v = list(set(gou))
cou = 0
for y in range(len(v)):
    num = gou.count(v[y])
    cou += num*(num-1)//2
print(cou)

### FIXED CODE ###

# -*- coding: utf-8 -*-
from sys import stdin

n = int(stdin.readline().rstrip())
data = [stdin.readline().rstrip() for _ in range(n)]
new = []
for i in range(n):
    sort = sorted(data[i])
    sorting = "".join(sort)
    new.append(sorting)
new.sort()
score = 0
s = 0
count  = 0
while s<n-1:
    daburi = 1
    for p in range(s,n-1):
        if new[p] == new[p+1]:
            daburi += 1
        else:
            break
    score += daburi*(daburi-1)//2
    count += daburi
    s = count
print(score)
### BUGGY CODE ###

from fractions import gcd

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

g=A[0]
l=A[0]
for i in range(N):
    g=gcd(l,A[i])
    l=l*A[i]//g
    
ans=0
mod=10**9+7

for i in range(N):
    ans+=l//A[i]
    
print(ans%mod)
   

### FIXED CODE ###

from collections import defaultdict
import sys
input = sys.stdin.readline

N=int(input())
A=list(map(int,input().split()))
lcm = defaultdict(int)


for i in range(N):
    a=A[i]
    for j in range(2,a):
        temp=0
        while a%j==0:
            a=a//j
            temp+=1
        lcm[j]=max(lcm[j],temp)
        if a==1 or j*j>A[i]:
            break
    if a!=1:
        lcm[a]=max(lcm[a],1)
                
        
l=1
for d in lcm.items():
    l*=pow(d[0],d[1])
    

ans=0
mod=10**9+7

for i in range(N):
    ans+=l//A[i]
    
print(ans%mod)
### BUGGY CODE ###

N, K = map(int, input().split())
lst = [int(x) for x in input().split()]
a = len(lst) - K + 1
n = 0
ret_lst = []
for i in range(a):
    m = sum(lst[i : i + K])
    if n < m:
        n = m
        ret_lst = lst[i : i + K]

ll = [sum(range(1, x + 1)) / x for x in ret_lst]
print(sum(ll))


### FIXED CODE ###

N, K = map(int, input().split())
lst = [int(x) for x in input().split()]
tmp = sum(lst[:K])
ret = tmp
for i in range(N - K):
    tmp -= lst[i]
    tmp += lst[i + K]
    ret = max(ret, tmp)
print((ret + K) / 2)
### BUGGY CODE ###

import numpy as np

#def f(x,a):
#  return np.array([ c^x for c in a ],dtype=np.int64).sum()

def g(y,s):
  return np.array([s[m,y[m]] for m in range(M)]).sum()

(N,K) = map(int,input().split())
A = np.array(list(map(int,input().split())),dtype=np.int64)
M=40

B = np.empty((M,N),dtype=np.int)
Y = np.empty(M,dtype=np.int)

for n in range(N):
  for m in range(M):
    B[m,n] = (A[n] >> m) & 1

S = np.empty((M,2),dtype=np.int64)
for m in range(M):
  s = B[m].sum()
  S[m] = [s<<m,(N-s)<<m]
  if 2*s < N:
    Y[m] = 1
  else:
    Y[m] = 0

Kb = np.array([ (K >> m) & 1 for m in range(M)],dtype=np.int64)

ans = S[:,0].sum()
for m in range(M):
  if Kb[m] == 0:
    continue
  else:
    Z = np.concatenate((Y[:m],np.array([0],dtype=np.int64),Kb[m+1:]))
    ans = max(ans,g(Z,S))

print(ans)

### FIXED CODE ###

inpl = lambda: list(map(int,input().split()))
N, K = inpl()
A = inpl()

L = K+1
M = len(bin(L))-2
MM = max(M, len(bin(max(A)))-2)
best = []
ones_num = []
zeros_num = []
for m in range(MM):
    ones = sum([ (A[i]>>m)&1 for i in range(N) ])
    zeros = N - ones
    ones_num.append(ones)
    zeros_num.append(zeros)
    if ones >= zeros:
        best.append(0)
    else:
        best.append(1)
cur = sum([ (N-ones_num[m] if (best[m] and m < M-1) else ones_num[m])<<m for m in range(MM)])
ans = cur
m = M - 1
while m > 0:
    cur += (zeros_num[m]-ones_num[m])<<m
    m -= 1
    while (L >> m)&1 == 0:
        if best[m] == 1:
            cur += (ones_num[m]-zeros_num[m])<<m
        m -= 1
        if m < 0:
            break
    else:
        if best[m] == 1:
            cur += (ones_num[m]-zeros_num[m])<<m
        if cur > ans:
            ans = cur
print(ans)
### BUGGY CODE ###

#尺取り法と累積和
n, k = map(int, input().split())
a = list(map(int, input().split()))
#kを法とする配列を作る
a = [i % k for i in a]
acc_a = [0 for i in range(n+1)]
acc_a[0] = 0
acc_a[1] = a[0]
#kを法とする累積和
for i in range(2,len(a) + 1):
    acc_a[i] = (a[i - 1] + acc_a[i-1]) % k
#print(acc_a)
ans = 0
for i in range(len(acc_a)):
    for j in range(max(0, i - k), i):
        #print("i {}  j {}".format(i,j))
        list_sum = acc_a[i] - acc_a[j]
        if list_sum < 0:
            list_sum += k
        if i - j == list_sum:
            #print("i {}  j {}".format(i,j))
            ans += 1
print(ans)

### FIXED CODE ###

from collections import deque
n, k = map(int, input().split())
a = list(map(int, input().split()))
#kを法とする配列を作る
a = [(i - 1) for i in a]
acc_a = [0 for i in range(n+1)]
acc_a[0] = 0
acc_a[1] = a[0] % k
#kを法とする累積和
for i in range(2,len(a) + 1):
    acc_a[i] = (a[i - 1] + acc_a[i-1]) % k
ans = 0
count = {}
q = deque()
for i in acc_a:
    if i not in count:
        count[i] = 0
    ans += count[i]
    count[i] += 1
    q.append(i)
    if len(q) == k:
        count[q.popleft()] -= 1
print(ans)
### BUGGY CODE ###

n,m = map(int,input().split())
a = list(map(int,input().split()))
a.sort()
for i in range(m):
  a[-1] = a[-1]//2
  a.sort()
  if a[-1] == 0:
    break
print(sum(a))

### FIXED CODE ###

import heapq
n,m = map(int,input().split())
a = list(map(lambda x: (-1)*int(x),input().split()))
heapq.heapify(a)

for i in range(1,m+1):
  t=heapq.heappop(a)
  heapq.heappush(a,-(-t//2))

print(-sum(a))
### BUGGY CODE ###

n=int(input())
a=list(map(int,input().split()))
ans=1
for i in range(n):
  ans*=a[i]
if ans>10**18:
  print(-1)
  exit()
print(ans)

### FIXED CODE ###

n=int(input())
a=list(map(int,input().split()))
ans=1
if 0 in a:
  print(0)
  exit()
for i in a:
  ans*=i
  if ans>10**18:
    print(-1)
    exit()
print(ans)
### BUGGY CODE ###

from operator import itemgetter
import bisect
N, D, A = map(int, input().split())
enemies = sorted([list(map(int, input().split())) for i in range(N)], key=itemgetter(0))
d_enemy = [enemy[0] for enemy in enemies]
b_left = bisect.bisect_left
logs = []
ans = 0
for i, enemy in enumerate(enemies):
    X, hp = enemy
    count = 0
    for log in logs:
        start, end, log_count = log
        if start <= X <= end:
            count += log_count
    hp -= count * A
    if hp > 0:
        attack_num = (hp + A-1) // A
        logs.append((X, X+2*D, attack_num))
        ans += attack_num
print(ans)





### FIXED CODE ###

from operator import itemgetter
import bisect
N, D, A = map(int, input().split())
enemies = sorted([list(map(int, input().split())) for i in range(N)], key=itemgetter(0))
d_enemy = [enemy[0] for enemy in enemies]
b_left = bisect.bisect_left
logs = []
logs_S = [0, ]
ans = 0
for i, enemy in enumerate(enemies):
    X, hp = enemy

    start_i = b_left(logs, X-2*D)
    count = logs_S[-1] - logs_S[start_i]

    hp -= count * A
    if hp > 0:
        attack_num = (hp + A-1) // A
        logs.append(X)
        logs_S.append(logs_S[-1]+attack_num)
        ans += attack_num
print(ans)
### BUGGY CODE ###

def main():
    n, a, b = map(int, input().split(' '))
    cmb = []
    cmb.append(n)

    ans = 0
    for i in range(1, n+1):
        if i == a or i == b:
            pass
        else:
            ans += cmb[i-1]
        cmb.append(cmb[-1]*(n-i)/(i+1))

    print(int(ans%(pow(10,9)+7)))

if __name__ == '__main__':
    main()

### FIXED CODE ###

def mpow(x, n):
    result = 1
    while n != 0:
        if n & 1 == 1:
            result *= x
            result %= 1000000007
        x *= x
        x %= 1000000007
        n >>= 1

    return result

def mcomb(n, k):
    a = 1
    b = 1
    for i in range(k):
        a *= n - i
        a %= 1000000007
        b *= i + 1
        b %= 1000000007

    return a * mpow(b, 1000000005) % 1000000007

def main():
    n, a, b = map(int, input().split())
    
    ans = mpow(2, n) - mcomb(n, a) - mcomb(n, b) - 1

    print(ans%1000000007)

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

N=int(input())
A=list(map(int,input().split()))
i=0
division=1
for i in range(0,N):
    division=division*A[i]
    i+=1
if division<=10**18:
    print(division)
if division>10**18:
    print("-1")

### FIXED CODE ###

N=int(input())
A=list(map(int,input().split()))
i=0
division=1
if 0 in A:
    print(0)
else:
    for i in range(0,N):
        division=division*A[i]
        i+=1
        if division>10**18:
            print("-1")
            break
    if 0<division<=10**18:
        print(division)
### BUGGY CODE ###

import sys
sys.setrecursionlimit(400000)

def find_ans(s,lo,hi):
    if hi-lo<=1 :
        return(0)
    j=0
    Max=-10
    for i in range(lo,hi):
        if s[i]>=Max :
            j=i
            Max=s[i]
    
    ans=0
    for i in range(j+1,hi):
        ans+=(Max-s[i])
    
    ans+=find_ans(s,lo,j) 
    return(ans)

n=int(input())
s=list(map(int,input().split()))
print(find_ans(s,0,n))


### FIXED CODE ###

n=int(input())
s=list(map(int,input().split()))

ans=0
for i in range(n-1):
    ans+=max(s[i]-s[i+1],0)
    s[i+1]=max(s[i+1],s[i])

print(ans)