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

from collections import Counter
n,m = map(int, input().split())
lr = []
for i in range(m):
    l,r = map(int, input().split())
    lr += list(range(l,r+1))
lr = Counter(lr).most_common()
num = 0
for h in range(len(lr)):
    if lr[h][1] == m:
        num += 1
    else:
        break
print(num)

### FIXED CODE ###

n,m = map(int, input().split())
mini = 0
maxi = 10**9
for i in range(m):
    l,r = map(int, input().split())
    if mini < l:
        mini = l
    if r < maxi:
        maxi = r
t = maxi -mini + 1
if maxi < mini:
    print(0)
else:
    print(t)
### BUGGY CODE ###

n,W=map(int,input().split())
w_list=[]
v_list=[]
dp=[]
for i in range(n):
    w,v=map(int,input().split())
    w_list.append(w)
    v_list.append(v)
for i in range(n+1):
    dp_sub=[]
    for j in range(W+1):
        dp_sub.append(-1)
    dp.append(dp_sub)
def f(i,w):
    if dp[i][w]>=0:
        return dp[i][w]
    else:
        if i==n:
            return 0
        else:
            if w_list[i]<=w:
                return max(f(i+1,w),f(i+1,w-w_list[i])+v_list[i])
            else:
                return f(i+1,w)
print(f(0,W))




### FIXED CODE ###

n,W=map(int,input().split())
w_list=[]
v_list=[]
dp=[]
for i in range(n):
    w,v=map(int,input().split())
    w_list.append(w)
    v_list.append(v)
for i in range(n):
    dp_sub=[]
    for j in range(W+1):
        dp_sub.append(-1)
    dp.append(dp_sub)
dp_sub=[]
for j in range(W+1):
    dp_sub.append(0)
dp.append(dp_sub)
for i in range(n):
    i_=n-1-i
    for j in range(W+1):
        if w_list[i_]<=j:
            dp[i_][j]=max(dp[i_+1][j],dp[i_+1][j-w_list[i_]]+v_list[i_])
        else:
            dp[i_][j]=dp[i_+1][j]
print(dp[0][W])
### BUGGY CODE ###

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

def check(i,j):
    a = abs(i-j)
    h = A[i] + A[j]
    if a == h:
        return True
    else:
        return False

res = 0
for i in range(N):
    for j in range(i+1,N):
       if check(i,j):
           res += 1 

print(res)


### FIXED CODE ###

from collections import defaultdict

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

CNT = defaultdict(int)
ans = 0

for i, a in enumerate(A):
    ima = i-a
    if ima in CNT:
        ans += CNT[ima]

    CNT[i+a] += 1

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

# -*- coding: utf-8 -*-

import fractions
def min_kou(a):
  ans = a[0]
  for i in range(1, len(a)):
    ans = ans * a[i] // fractions.gcd(ans, a[i])
  return ans

def main():
  N = int(input())
  A = list(map(int, input().split()))
  min_res = min_kou(A)
  ans = 0
  for i in A:
    ans += min_res // i
  print(ans % 1000000007)
  
if __name__ == '__main__':
  main()

### FIXED CODE ###

# -*- coding: utf-8 -*-

import fractions
def min_kou(a):
  ans = a[0]
  for i in range(1, len(a)):
    ans = ans * a[i] // fractions.gcd(ans, a[i])
  return ans

def main():
  N = int(input())
  A = list(map(int, input().split()))
  min_res = min_kou(A)
  ans = 0
  for i in A:
    ans += min_res // i
  print(ans % 1000000007)
  
if __name__ == '__main__':
  main()
### BUGGY CODE ###

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


dp=[0]+[float("inf")]*(N-1)


for i in range(N-1):
    for j in range(i,i+K):
        if j+1>N-1:
            break
        dp[j+1]=min(abs(h[j+1]-h[i])+dp[i],dp[j+1])
    

print(dp[-1])

### FIXED CODE ###

N,K=list(map(int, input().split()))
h=list(map(int, input().split()))
 
 
dp=[0]+[float("inf")]*(N-1)
 
 
for i in range(N-1):
    for j in range(i,i+K):
        if j+1>N-1:
            break
        dp[j+1]=min(abs(h[j+1]-h[i])+dp[i],dp[j+1])
    
 
print(dp[-1])
### BUGGY CODE ###

import sys
readline = sys.stdin.readline
from math import log2
from itertools import accumulate
N, M = map(int, readline().split())
A = [list(map(int, readline().split())) for i in range(N)]
B = max(max(Ai) for Ai in A)
if M == 1:
    if N == 1 or all(A[i][0] < A[i+1][0] for i in range(N-1)):
        print("0")
    else:
        print("-1")
    exit(0)
logB = log2(B)
logBi = int(logB)
INF = 10**18
def gen(P, t, L = min(logBi+2, M-1)):
    if t <= logB:
        for k in range(t):
            P[:] = accumulate(P)
    else:
        for k in range(t):
            P[:L] = accumulate(P[:L])
        for i in range(logBi+2, M):
            P[i] = INF
T = [0]*N
ans = 0
P = [0]*M
for i in range(N-1):
    a0, a1 = A[i][:2]
    b0, b1 = A[i+1][:2]
    if a0 < b0:
        continue
    if a0 > b0:
        ans = -1
        break
    t0 = T[i]
    v = max(t0*a0 + a1 - b1, 0)
    if v % b0 > 0:
        T[i+1] = t1 = (v + b0-1) // b0
        ans += t1
        continue

    t1 = v // b0
    if t0 <= t1:
        P[:] = A[i+1]
        gen(P, t1 - t0)
        if P <= A[i]:
            t1 += 1
    else:
        P[:] = A[i]
        gen(P, t0 - t1)
        if A[i+1] <= P:
            t1 += 1
    T[i+1] = t1
    ans += t1
print(ans)

### FIXED CODE ###

import sys
readline = sys.stdin.readline
from math import log2
from itertools import accumulate
N, M = map(int, readline().split())
A = [list(map(int, readline().split())) for i in range(N)]
B = max(max(Ai) for Ai in A)
if M == 1:
    if N == 1 or all(A[i][0] < A[i+1][0] for i in range(N-1)):
        print("0")
    else:
        print("-1")
    exit(0)
logB = log2(B)
logBi = int(logB)
INF = 10**18
INFL = [INF]*(M - logBi-2)
def gen(P, t, L = min(logBi+2, M)):
    if t <= logB:
        for k in range(t):
            P[:] = accumulate(P)
    else:
        V = [1]*L
        for k in range(1, L):
            V[k] = V[k-1] * (t + k - 1)//k

        for i in range(L-1, 0, -1):
            P[i] += sum(P[j] * V[i-j] for j in range(i))
        if logBi+2 < M:
            P[logBi+2:] = INFL
T = [0]*N
ans = 0
P = [0]*M
for i in range(N-1):
    a0, a1 = A[i][:2]
    b0, b1 = A[i+1][:2]
    if a0 < b0:
        continue
    if a0 > b0:
        ans = -1
        break
    t0 = T[i]
    v = max(t0*a0 + a1 - b1, 0)
    if v % b0 > 0:
        T[i+1] = t1 = (v + b0-1) // b0
        ans += t1
        continue

    t1 = v // b0
    if t0 <= t1:
        P[:] = A[i+1]
        gen(P, t1 - t0)
        if P <= A[i]:
            t1 += 1
    else:
        P[:] = A[i]
        gen(P, t0 - t1)
        if A[i+1] <= P:
            t1 += 1
    T[i+1] = t1
    ans += t1
print(ans)
### BUGGY CODE ###

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

tot = n ** m

if d == 0:
    print((m-1)/n)
else:
    print((m-1) * 2 * (n-d) / n ** 2)


### FIXED CODE ###

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

if d == 0:
    print((m-1)/n)
else:
    print((m-1) * 2 * (n-d) / n ** 2)
### BUGGY CODE ###

x,k,d=map(int,input().split())
s = abs(x-(1*d*0)+(1*d*(k-0)))
for i in range(k+1):
    s =min(abs(x-(1*d*i)+(1*d*(k-i))),s)
print(s)

### FIXED CODE ###

x,k,d=map(int,input().split())
x =abs(x)
o =x//d
if (x-d*k) >=0:
    print(x-d*k)
    exit()
else:
    if (k-o)%2==0:
        print(abs(x%d))
        exit()
    else:
        print(abs(x%d-d))
        exit()
### BUGGY CODE ###

from collections import deque
import sys
def longest_subsequence(sequence):
  table = [(1, sequence[0])]
  for x in sequence[1:]:
    maxlen = 0
    for (L, z) in table:
      if z < x: # strict increasing
        maxlen = max(maxlen, L)
    table.append((maxlen+1, x))
  return max(L for (L, _) in table)
def BFS():
  node_sequences = [[] for _ in range(n)]
  visited = [False]*n
  queue_nodes = deque()
  queue_nodes.append((0, []))
  while queue_nodes:
    (vertex, sequence) = queue_nodes.popleft()
    visited[vertex] = True
    node_sequences[vertex] = sequence + [a[vertex]]
    for node in adjacent[vertex]:
      if not visited[node]:
        queue_nodes.append((node, node_sequences[vertex]))
  for sequence in node_sequences:
    yield sequence
n = int(input())
a = list(map(int, input().split()))
adjacent = {i: [] for i in range(n)}
for _ in range(n-1):
  node1, node2 = map(int, input().split())
  node1 -= 1
  node2 -= 1
  adjacent[node1].append(node2)
  adjacent[node2].append(node1)
long_sequences = BFS()
[print(longest_subsequence(sequence)) for sequence in long_sequences]

### FIXED CODE ###

import sys
sys.setrecursionlimit(1000000)
from bisect import bisect, bisect_left
def longest_subsequence(sequence):
  subsequence = [float("inf") for _ in range(len(sequence)+1)]
  subsequence[0] = float("-inf")
  for value in sequence:
    j = bisect(subsequence, value)
    if subsequence[j-1] != value: # strict increasing
      subsequence[j] = value
  return bisect_left(dp, float("inf"))-1
# print(longest_subsequence([9, 13, 2, 10, 4, 13, 11, 13]))
# sys.exit()
def dfs(vertex):
  visited[vertex] = True
  value = a[vertex]
  j = bisect(subsequence, value)
  previous = subsequence[j]
  if subsequence[j-1] != value: # strict increasing
    subsequence[j] = value
  ans[vertex] = bisect_left(subsequence, float("inf"))-1
  for node in adjacent[vertex]:
    if not visited[node]:
      dfs(node)
  subsequence[j] = previous
  return
n = int(input())
a = list(map(int, input().split()))
adjacent = {i: [] for i in range(n)}
for _ in range(n-1):
  node1, node2 = map(int, input().split())
  node1 -= 1
  node2 -= 1
  adjacent[node1].append(node2)
  adjacent[node2].append(node1)
visited = [False]*n
ans = [0]*n
subsequence = [float("inf") for _ in range(n+1)]
subsequence[0] = float("-inf")
dfs(0)
[print(value) for value in ans]
### BUGGY CODE ###

n = int(input())
p = list(map(int, input().split()))
ans = 0
for i in range(n):
    l = p[:i + 1]
    if min(l) >= p[i]:
        ans += 1

print(ans)

### FIXED CODE ###

n = int(input())
p = list(map(int, input().split()))
ans = 0
m = p[0]
for i in range(n):
    num = p[i]
    if m >= num:
        ans += 1
    m = min(m, num)

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

S = str(input())
N = len(S)
cnt = 0

for i in range(N):
    for j in range(i+1,N):
        if int(S[i:j+1]) % 2019 == 0:
            cnt += 1
            
print(cnt)

### FIXED CODE ###

s = input()[::-1] # 入力文字列を逆順でsに格納

counts = [0] * 2019
counts[0] = 1

num, d = 0, 1

for char in s:
    num += int(char) * d
    num %= 2019
    d *= 10
    d%= 2019
    counts[num] += 1

ans = 0
for cnt in counts:
    ans += cnt * (cnt - 1) // 2

print(ans) # 答えの出力
### BUGGY CODE ###

from operator import itemgetter
a,b=map(int,input().split())
c=[list(map(int,input().split())) for i in range(a)]
c.sort()
d=[]
sum=0
e=0
for i in range(1,b+1):
  for j in range(e,a):
    if c[j][0]<=i:
      d.append(c[j][1])
    else:
      e=j
      break
  d.sort()
  if len(d)>0:
    sum+=d[-1]
    d.pop()
      
    
  
print(sum)

### FIXED CODE ###

import heapq
a,b=map(int,input().split())
c=[list(map(int,input().split())) for i in range(a)]
c.sort()
d=[[0]for i in range(b)]
sum=0
for i,j in c:
  if i<=b:
    d[i-1].append(j)
e=[]

for i in d:
  for j in i:
    heapq.heappush(e,-j)
  sum-=heapq.heappop(e)
      
    
  
print(sum)
### BUGGY CODE ###

from collections import deque
n=int(input())
a=[int(i) for i in input().split()]
ans=deque([])
for i in a:
    ans.append(i)
    ans=list(reversed(ans))
print(*ans,sep=' ')

### FIXED CODE ###

from collections import deque
n=int(input())
a=[int(i) for i in input().split()]
ans=deque([])
for i,j in enumerate(a):
    if n%2==i%2:
        ans.append(j)
    else:
        ans.appendleft(j)
print(*ans,sep=' ')
### BUGGY CODE ###

N, K, Q = map(int, input().split())
array = []

for i in range(Q):
    A = int(input())
    array.append(A)

for i in range(1,N+1):
    if(Q - array.count(i) >= K):
        print("No")
    else:
        print("Yes")

### FIXED CODE ###

N, K, Q = map(int, input().split())
array = [0] * N

for i in range(Q):
    A = int(input())
    array[A-1] += 1

for i in range(0,N):
    if(Q - array[i] >= K):
        print("No")
    else:
        print("Yes")
### BUGGY CODE ###

from copy import deepcopy


N, K = map(int, input().split())
Items_ = [tuple(map(int, input().split())) for _ in range(N)]
Items_.sort(reverse=True)
Items = []
Now = [Items_[0][1]]
now = Items_[0][0]
for item in Items_[1:]:
    if item[0] == now:
        Now.append(Now[-1]+item[1])
    else:
        Items.append(Now)
        Now = [item[1]]
        now = item[0]
if Now:
    Items.append(Now)

DP = [[-float('inf')] * (K+1) for _ in range(K+1)]
DP[0][0] = 0
for i, item in enumerate(Items):
    D = deepcopy(DP)
    for j in range(K):
        for k in range (K):
            if DP[j][k] < 0:
                continue
            for l, it in enumerate(item, 1):
                if j + l <= K and k < K:
                    D[j + l][k + 1] = max(D[j + l][k + 1], DP[j][k] + it)
    DP = D

ans = 0
for i, item in enumerate(DP[K]):
    ans = max(ans, item + i**2)
print(ans)


### FIXED CODE ###

from collections import defaultdict

N, K = map(int, input().split())
Items = [tuple(map(int, input().split())) for _ in range(N)]
Items.sort(reverse=True, key=lambda x: x[1])
Kinds = defaultdict(int)
ans = 0
k = 0
Candidates = []
for i, (t, d) in enumerate(Items):
    if i < K:
        ans += d
        if t not in Kinds:
            k += 1
        else:
            Candidates.append(d)
        Kinds[t] += 1
        if i == K - 1:
            ans += k ** 2
            a = ans
    else:
        if Kinds[t]:
            continue
        if not Candidates:
            break
        else:
            x = Candidates.pop()
            a -= x
            a -= k ** 2
            k += 1
            a += d
            a += k ** 2
            Kinds[t] -= 1
            ans = max(ans, a)
print(ans)
### BUGGY CODE ###

# coding: utf-8
# Your code here!
N,= map(int, input().split())
S=[]
su=0
for i in range(N):
    a = input()
    if(not a in S):
        su+=1
    S+=[a]    
print(su)

### FIXED CODE ###

# coding: utf-8
# Your code here!
N,= map(int, input().split())
S=[]
su=0
for i in range(N):
    a = input()
    S+=[a]    
print(len(set(S)))
### BUGGY CODE ###

N = int(input())

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

for num in nums:
    if nums.count(num) >= 2:
        print("NO")
        break
else:
    print("YES")

### FIXED CODE ###

N = int(input())

nums = tuple(map(int, input().split()))

if len(nums) == len(set(nums)):
    print("YES")
else:
    print("NO")
### BUGGY CODE ###

import sys
input = sys.stdin.readline
n,m = map(int,input().split())
a = [int(input()) for i in range(m)]
dp = [1]*2 + [0 for _ in range(n-1)]
mod = 1000000007
  
for i in range(n-1):
  if i+1 in a:
    dp[i+1] = 0
  dp[i+2] = dp[i]+dp[i+1]
  
  if dp[i+2] >= mod:
    dp[i+2] %= mod

print(dp[-1]%mod)  


### FIXED CODE ###

import sys
input = sys.stdin.readline
n,m = map(int,input().split())
hole = [0]*(n+1)
for i in range(m):
  hole[int(input())] = 1

dp = [0]*(n+1)
dp[0] = 1
MOD = 10**9+7
   
for i in range(1,n+1):
  if hole[i]==1:
    dp[i] = 0
  else:
    dp[i] = dp[i-1]+dp[i-2]
    dp[i] %= MOD

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

import sys
input = sys.stdin.readline
n,k = map(int,input().split())
s = input()
chk_0 = []
chk_1 = []
c0 = 0
c1 = 0
chk_0_append = chk_0.append
chk_1_append = chk_1.append
if s[0]=='0':
  c0 += 1
else:
  c1 += 1
  chk_0_append(0)

for i in range(n-1):
  if s[i]=='0' and s[i+1]=='0':
    c0 += 1
  if s[i]=='0' and s[i+1]=='1':
    chk_0_append(c0)
    c0 = 0
    c1 = 1
  if s[i]=='1' and s[i+1]=='0':
    chk_1_append(c1)
    c0 = 1
    c1 = 0
  if s[i]=='1' and s[i+1]=='1':
    c1 += 1

if c0 != 0:
  chk_0_append(c0)
  chk_1_append(0)
elif c1 != 0:
  chk_1_append(c1)
  chk_0_append(0)

if len(chk_0) <= k:
  print(n)
  exit()

chk_1 = tuple(chk_1)
chk_0 = tuple(chk_0)
ab = [x+y for x,y in zip(chk_0,chk_1)]
ab = tuple(ab)

ans = 0
for i in range(len(chk_0)-k+1):
  chk = sum(ab[i:i+k])
  if i >= 1:
    chk += chk_1[i-1]
  ans = max(ans,chk)
print(ans)

### FIXED CODE ###

def main():  
  import sys
  input = sys.stdin.readline
  import numpy as np

  n,k = map(int,input().split())
  s = input()
  chk_0 = []
  chk_1 = []
  c0 = 0
  c1 = 0
  chk_0_append = chk_0.append
  chk_1_append = chk_1.append
  if s[0]=='0':
    c0 += 1
  else:
    c1 += 1
    chk_0_append(0)

  for i in range(n-1):
    if s[i]=='0' and s[i+1]=='0':
      c0 += 1
    if s[i]=='0' and s[i+1]=='1':
      chk_0_append(c0)
      c0 = 0
      c1 = 1
    if s[i]=='1' and s[i+1]=='0':
      chk_1_append(c1)
      c0 = 1
      c1 = 0
    if s[i]=='1' and s[i+1]=='1':
      c1 += 1

  if c0 != 0:
    chk_0_append(c0)
    chk_1_append(0)
  elif c1 != 0:
    chk_1_append(c1)
    chk_0_append(0)

  if len(chk_0) <= k:
    print(n)
    exit()

  chk_1 = tuple(chk_1)
  chk_0 = tuple(chk_0)
  ab = np.array([x+y for x,y in zip(chk_0,chk_1)])
  np.cumsum(ab,out=ab)
  ab = tuple(ab)
  #print(ab)
  ans = ab[k-1]
  for i in range(len(ab)-k):
    chk = ab[k+i]-ab[i]
    chk += chk_1[i]
    ans = max(ans,chk)
  print(ans)
if __name__ == '__main__':
    main()
### BUGGY CODE ###

def digits_of (n): # nの桁の数字のリストを出力する関数｡ nは自然数
    digits = [] # nの桁の数字を入れるリスト
    while n != 0:
        r = n % 10 # 10で割った余り
        digits.append(r) # リストに加える
        n = n // 10 # nを10で割った整数に置き換える
    return digits
def is_multiple_of_9 (n): # nは自然数
    sum = 0 # 各桁の数字の合計をもとめる
    for i in digits_of (n):
        sum += i
    return sum % 9 == 0 

n=int(input())

if (is_multiple_of_9(n)):
    print("Yes")
else:
    print("No")


### FIXED CODE ###

n=int(input())
n=str(n)
c=0
for i in range (len(n)):
    c+=int(n[i])

if c%9==0:
    print("Yes")
else :
    print("No")
### BUGGY CODE ###

def expect(n):
    return (int(n)+1)/2
N, K = map(int,input().split()) 
P = list(map(expect,input().split()))
maxsize = sum(P[0:K])
for i in range(N-K):
    if P[i]>P[i+K]:
        pass
    else:
        if sum(P[i+1:i+K+1]) > maxsize:
            maxsize = sum(P[i+1:i+K+1])
print('{:.7f}'.format(maxsize))

### FIXED CODE ###

def expect(n):
    return (int(n)+1)/2
N, K = map(int,input().split()) 
P = list(map(expect,input().split()))
sumlist = [sum(P[0:K])]
sumnumber = sum(P[0:K])
for i in range(N-K):
    sumnumber -=P[i]
    sumnumber +=P[i+K]
    sumlist.append(sumnumber)
print(max(sumlist))
### BUGGY CODE ###

x=int(input())
m=0
n=0
w=0
e=1
r=1
if m==0:
  while  n==0:
    u=e**5-w**5
    if u>x:
      w==0
      r+=1
      e=r
    if x==u:
      print(e,end=" ")
      print(w)
      n+=1
    else:
      e+=1
      w+=1

### FIXED CODE ###

x=int(input())
m=0
for i in range(500):
  for k in range(500):
    w=i**5
    e=k**5
    r=k**5*-1
    if w-e==x:
      print(i,end=" ")
      print(k)
      m+=1
      break
    elif w-r==x:
      print(i,end=" ")
      print(k*-1)
      m+=1
      break
  if m==1:
    break
### BUGGY CODE ###

N = int(input())
p = [0] + list(input().split())

for i in range(1, N+1):
    item = p[i].replace('0.', '')
    p[i] = int(item)

#print(p)

dp = [[0 for a in range(3100)] for b in range(3100)]
#dp[i][j] = i枚目までのコインを投げて，表の個数がj枚である確率 * (10**(2*i))

dp[1][0] = 100-p[1]
dp[1][1] = p[1]

for i in range(2, N + 1):
    for j in range(i+1):
        dp[i][j] = (dp[i-1][j-1] * p[i] + dp[i-1][j] * (100-p[i])) // 10 ** max(0, i-10)
        #dp[i][j] = i-1枚目までで表がj-1かつi回目で表　＋　i-1回目までで表がj枚かつi回目で裏（MECE）
        #print(i, j, dp[i][j])
        #プログラムの仕組み上，iが一つ進むと，100 * 100 = 10**4　ずつスケールが大きくなっていく。10**20で打ち切る。


ans = 0

for k in range(-(-N//2), N+1):
    ans += dp[N][k]

dig = min(2*N, 10)

print(ans/10**dig)


### FIXED CODE ###

import numpy as np

N = int(input())
p = [0] + list(map(float, input().split()))

dp = np.zeros((3100, 3100))
#dp[i, j] = i枚目までのコインを投げて，表の個数がj枚である確率
#pythonのlistだと遅いので，numpyにおけるベクトル漸化式としてdpを埋めていく

dp[1, 0] = 1-p[1]
dp[1, 1] = p[1]

for i in range(2, N + 1):
    dp[i] = np.roll(dp[i-1], 1) * p[i] + dp[i-1] * (1-p[i])
    #dp[i][j] = i-1枚目までで表がj-1かつi回目で表　＋　i-1回目までで表がj枚かつi回目で裏（MECE）
    #つまり，dp[i][j] = dp[i-1][j-1] * p[i] + dp[i-1][j] * (1 - p[i])
    #numpyを使ってベクトル漸化式と見ることで，for_loopを一層分解消。
    #print(i, j, dp[i][j])

ans = 0

for k in range(-(-N//2), N+1):
    ans += dp[N, k]

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

n = int(input())
ans = 0
for a in range (1,n):
    temp = 0
    for b in range(1, n):
        temp = a * b
        if n <= temp:
            break
        ans += 1
print(ans)

### FIXED CODE ###

n = int(input())
ans = 0
for a in range (1,n):
    for b in range(a, n, a):
        ans += 1
print(ans)
### BUGGY CODE ###

import bisect
n,m=map(int,input().split())
cl=[list(map(int,input().split())) for i in range(m)]
pl=[[] for i in range(n)]
for p,y in cl:
    bisect.insort(pl[p-1],y)
for p,y in cl:
    print('{0:06d}{1:06d}'.format(p,pl[p-1].index(y)+1))

### FIXED CODE ###

n,m=map(int,input().split())
py=[list(map(int,input().split()))+[i] for i in range(m)]
py.sort(key=lambda x:x[1])
ans=[]
cnt=[0]*n
for p,y,i in py:
    ans.append(['{0:06d}{1:06d}'.format(p,cnt[p-1]+1),i])
    cnt[p-1]+=1
ans.sort(key=lambda x:x[1])
for a,i in ans:
    print(a)
### BUGGY CODE ###

s=[len(c) for c in list(input().split("T"))]
x,y=map(int,input().split())
XX=s[::2]
YY=s[1::2]
X=[XX[0]]
Y=[0]
XXX=[]
for i in range(1,len(XX)):
    for j in X:
        XXX.append(j+XX[i])
        XXX.append(j-XX[i])
    X=XXX
    XXX=[]

YYY=[]
for i in range(len(YY)):
    for j in Y:
        YYY.append(j+YY[i])
        YYY.append(j-YY[i])
    Y=YYY
    YYY=[]

if x in X and y in Y:
    print("Yes")
else:
    print("No")

### FIXED CODE ###

s=[len(c) for c in list(input().split("T"))]
x,y=map(int,input().split())
XX=s[::2]
YY=s[1::2]
X=set([XX[0]])
Y=set([0])
XXX=[]
for i in range(1,len(XX)):
    for j in X:
        XXX.append(j+XX[i])
        XXX.append(j-XX[i])
    X=set(XXX)
    XXX=[]

YYY=[]
for i in range(len(YY)):
    for j in Y:
        YYY.append(j+YY[i])
        YYY.append(j-YY[i])
    Y=set(YYY)
    YYY=[]

if x in X and y in Y:
    print("Yes")
else:
    print("No")
### BUGGY CODE ###

from collections import defaultdict

s = input()
N = len(s)

# ord('a') == 97
acc_xor = [0] * (N+1)
for i in range(N):
    acc_xor[i+1] = acc_xor[i] ^ (2 ** (ord(s[i]) - 97))
acc2idx = defaultdict(lambda: [0])
for i in range(N+1):
    acc2idx[acc_xor[i]].append(i)

dp = [defaultdict(lambda: float('inf')) for _ in range(N+1)]
dp[0][0] = 0
for i in range(N):
    hash_cur = acc_xor[i]
    dp[max(acc2idx[hash_cur])][hash_cur] = min(dp[max(acc2idx[hash_cur])][hash_cur], dp[i][hash_cur] + 1)
    for j in range(26):
        hash_new = hash_cur ^ (2**j)
        dp[max(acc2idx[hash_new])][hash_new] = min(dp[max(acc2idx[hash_new])][hash_new], dp[i][hash_cur] + 1)

print(min(dp[-1].values()))


### FIXED CODE ###

def main():
    import sys
    from bisect import bisect_left
    input = sys.stdin.readline

    S = input().rstrip('\n')
    N = len(S)

    A = [ord(s)-97 for s in S]
    H = [0] * (N+1)
    h2i = {}
    for i in range(N):
        H[i+1] = H[i] ^ (1 << A[i])
        if H[i+1] in h2i:
            h2i[H[i+1]].append(i+1)
        else:
            h2i[H[i+1]] = [i+1]

    dp = [N+1] * (N+1)
    dp[0] = 0
    pow2 = [2**i for i in range(26)]
    for i in range(N):
        h = H[i]
        if h in h2i:
            ii_list = h2i[h]
            ii = bisect_left(ii_list, i+1)
            if ii < len(ii_list):
                ii = ii_list[ii]
                if i:
                    dp[ii] = min(dp[ii], dp[i])
                else:
                    dp[ii] = 1
        for j in pow2:
            new_h = h ^ j
            if new_h in h2i:
                ii_list = h2i[new_h]
                ii = bisect_left(ii_list, i+1)
                if ii < len(ii_list):
                    ii = ii_list[ii]
                    dp[ii] = min(dp[ii], dp[i] + 1)
    print(dp[-1])


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

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

l=[]
r=[]
for i in range(m):
    a,b=map(int,input().split())
    l.append(a)
    r.append(b)

p=[]
q=[]    
for i in range(Q):
    c,d=map(int,input().split())
    p.append(c)
    q.append(d)
    
for i in range(Q):
    answer=0
    for j in range(m):
        if p[i]<=l[j]:
            if r[j]<=q[i]:
                answer+=1
    print(answer)


### FIXED CODE ###

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

l=[]
r=[]
for i in range(m):
    a,b=map(int,input().split())
    l.append(a)
    r.append(b)

p=[]
q=[]    
for i in range(Q):
    c,d=map(int,input().split())
    p.append(c)
    q.append(d)

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

for i in range(m):
    grid[l[i]][r[i]]+=1

for i in range(1,n+1):
    for j in range(1,n+1):
        grid[i][j]+=grid[i-1][j]
        grid[i][j]+=grid[i][j-1]
        grid[i][j]-=grid[i-1][j-1]
    
for i in range(Q):
    print(grid[q[i]][q[i]]-grid[q[i]][p[i]-1]-grid[p[i]-1][q[i]]+grid[p[i]-1][p[i]-1])