Harryxun/stf_run huggingface dataset:
ab=[]

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

for i in range(m):
    ab.append(tuple(map(int,input().split())))

ab.sort(key=lambda x:x[0])
abrs=ab.copy()
abrs.sort(key=lambda x:x[1])

res=0
mark=0
while(1):
    for j in range(len(ab)):
        if abrs[0][1] > ab[j][0]:
            pass
        else:
            if mark!=j:res+=1
            mark=j
            break
    del ab[:mark]
    if len(ab)==1:
        res+=1
        break
    for j in range(len(abrs)):
        if ab[0][0] > abrs[j][0]:
            pass
        else:
            mark=j
            break
    del abrs[:mark]
    
print(res)

### FIXED CODE ###

ab=[]

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

for i in range(m):
    ab.append(tuple(map(int,input().split())))

ab.sort(key=lambda x:x[1])

res=0
for z in range(len(ab)):
    x=ab[0][1]
    for j in range(len(ab)):
        if x > ab[0][0]:
            del ab[0]
        else:
            res+=1
            break
    if len(ab)==0:
        res+=1
        break
    
print(res)
i = 1
while True:
    x = int(input()))
    if(x == 0): 
        break;
    print(f"Case {i}: {x}")
    i += 1


### FIXED CODE ###

i = 1
while True:
    x = int(input())
    if(x == 0): 
        break
    print(f"Case {i}: {x}")
    i += 1
# D - Factorization

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

# M を素因数分解する 12 -> 2^2 * 3^1
# 2^2 と 3^1 の組み合わせをそれぞれ計算する。
# 2^2 は べき数を配分する組み合わせ。
# N=3の時、
# 2^2, 2^0, 2^0 -> 4, 1, 1
# 2^1, 2^1, 2^0 -> 2, 2, 1
# この組み合わせは べき数をxとした時、
# N-1個の区切り場所を追加したと仮定して、
# (x+N-1)C(N-1) 

def prime_factorization(n):
    prime_factors = []
    if n < 2:
        return 0
    for i in range(2, int(pow(n, 0.5)+1)):
        if n%i==0:
            ex = 0
            while n%i==0:
                ex += 1
                n //= i
            prime_factors.append((i, ex))
    # 割り切れなかった残りのnが1でない(素数)場合、リストに加える
    if n!=1:
        prime_factors.append((n,1))
    return prime_factors

fac = [1, 1]
inv = [0, 1]
finv = [1, 1]

for i in range(2, N+30):
    fac.append(fac[-1] * i % MOD)
    inv.append(MOD - inv[MOD%i] * (MOD//i) % MOD)
    finv.append(finv[-1] * inv[-1] % MOD)

def comb_mod(n, r, m):
    if (n<0 or r<0 or n<r): return 0
    r = min(r, n-r)
    return fac[n] * finv[n-r] * finv[r] % m

primes = prime_factorization(M)
ans = 1
for p, ex in primes:
    ans = (ans * comb_mod(ex+N-1, N-1, MOD)) % MOD

print(ans)

### FIXED CODE ###

# D - Factorization

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

def prime_factorization(n):
    prime_factors = []
    if n < 2:
        return 0
    for i in range(2, int(pow(n, 0.5)+1)):
        if n%i==0:
            ex = 0
            while n%i==0:
                ex += 1
                n //= i
            prime_factors.append((i, ex))
    if n!=1:
        prime_factors.append((n,1))
    return prime_factors

fac = [1, 1]
inv = [0, 1]
finv = [1, 1]

for i in range(2, N+36):
    fac.append(fac[-1] * i % MOD)
    inv.append(MOD - inv[MOD%i] * (MOD//i) % MOD)
    finv.append(finv[-1] * inv[-1] % MOD)

def comb_mod(n, r, m):
    if (n<0 or r<0 or n<r): return 0
    r = min(r, n-r)
    return fac[n] * finv[n-r] * finv[r] % m

primes = prime_factorization(M)
ans = 1
if primes != 0:
    for (p, ex) in primes:
        ans = (ans * comb_mod(ex+N-1, N-1, MOD)) % MOD

print(ans)
s = int(input())

start0 = 0
start1 = 0
for i in range(len(s)):
  if i % 2 == 0:
    if s[i] == "0":
      start1 += 1
    elif s[i] == "1":
      start0 += 1
  elif i % 2 == 1:
    if s[i] == "0":
      start0 += 1
    elif s[i] == "1":
      start1 += 1

print(min([start0, start1]))

### FIXED CODE ###

s = input()
 
start0 = 0
start1 = 0
for i in range(len(s)):
  if i % 2 == 0:
    if s[i] == "0":
      start1 += 1
    elif s[i] == "1":
      start0 += 1
  elif i % 2 == 1:
    if s[i] == "0":
      start0 += 1
    elif s[i] == "1":
      start1 += 1

print(min([start0, start1]))
n, m = map(int,input().split())
s = [list(map(int,input().split())) for _ in range(m)]
s.sort(key=lambda x: x[0])
for i in range(1,1000):
    num = str(i)
    count = 0
    if s[-1][0] > len(num):
        continue
    for j in range(m):
        if num[s[j][0]-1] == str(s[j][1]):
            count += 1
        else:
            break
        if len(num) == count:
            print(num)
            quit()

print(-1)

### FIXED CODE ###

n, m = map(int,input().split())
sc = [list(map(int,input().split())) for _ in range(m)]

for i in range(10**n):
    i = str(i)
    flag = True
    if len(i) == n:
        for j in range(m):
            if i[sc[j][0]-1] != str(sc[j][1]):
                flag = False
        if flag:
            print(i)
            quit()

print(-1)
s = input ()

def radius:
  return int(s) ** 2

print (s)

### FIXED CODE ###

s = input ()

def radius(r):
  to_number = int(r)
  return to_number ** 2

print (radius(s))
def main():
    n, d = map(int, input().split())
    is_shorter = lambda dis, x, y : dis**2 <= (x**2 + y**2)
    ans = sum([is_shorter(d, map(int, input().split())) for _ in range(n)])
    print(ans)

if __name__ == "__main__":
    main()

### FIXED CODE ###

def main():
    n, d = map(int, input().split())
    dis = d**2
    ans = 0
    for _ in range(n):
        x, y = map(int, input().split())
        if x**2 + y**2 <= dis:
            ans += 1
    print(ans)

if __name__ == "__main__":
    main()
#atcoder https://atcoder.jp/contests/dp/tasks/dp_b

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


dp = [0] * N
dp[0] = 0

for i in range(1, N):

    dp[i] = min(
        dp[k] + abs(h[i]-h[k]) for k in range(max(i-K,0), i)
    )

print(dp[N-1])


### FIXED CODE ###

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

	dp=[0]*N
 
	for i in range(1,N):
		dp[i] = min(
			dp[g] + abs(h[i] - h[g]) for g in range(max(i-K,0), i)
		)
	print(dp[N-1])
main()
N = int(input())
S = input()

MOD = 1e9 + 7
L = {}
for i in S:
  if i in L:
    L[i] += 1
  else:
    L[i] = 1

Ans = (2 ** N - 1) % MOD
t = 0
k = 1
for i in L.values():
  N -= i
  if i != 1:
    t += (k * (2 ** N) * ((2 ** i) - (i + 1))) % MOD
  k *= i + 1

Ans -= t % MOD

print(int(Ans % MOD))

### FIXED CODE ###

N = int(input())
S = input()

MOD = 1e9 + 7
L = {}
for i in S:
  if i in L:
    L[i] += 1
  else:
    L[i] = 1

Ans = 1
for i in L.values():
  Ans = Ans * (i + 1) % MOD

Ans -= 1
if Ans < 0:
  Ans += MOD

print(int(Ans))
n = int(input())
a = [0]*n
for i in range(1, n+1):
  if i % 3 == 0 or i % 5 == 0:
    pass
  else:
    a[i] = i
print(sum(a))
  

### FIXED CODE ###

n = int(input())
a = [0]*n
for i in range(1, n+1):
  if i % 3 == 0 or i % 5 == 0:
    pass
  else:
    a[i-1] = i
print(sum(a))
s = input().split()
t = input().split()
c = 0

for i in rangea(len(s)):
  if s[i] != t[i]:
    c += 1

print(str(c))


### FIXED CODE ###

s = input()
t = input()
c = 0
 
for i in range(len(s)):
  if s[i] != t[i]:
    c += 1
 
print(str(c))
# ABC138D - Ki
import sys

input = sys.stdin.readline
sys.setrecursionlimit(2 * 10 ** 5 + 2)


def dfs(v: int, p: int) -> None:
    x = cnt[v]
    for u in T[v]:
        if u != p:  # p: parent -> skip
            cnt[u] += x  # cumulative sum
            dfs(u, v)


def main():
    # Ai (A[i][0]) may be not a parent of Bi (A[i][1])
    global T, cnt
    N, Q = tuple(map(int, input().split()))  # vertices and queues
    E = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # tree, N+1: 1-idx
    for a, b in E:
        T[a] += [b]
        T[b] += [a]
    cnt = [0] * (N + 1)
    for p, x in P:
        cnt[p] += x  # increase vertex p by x
    dfs(1, -1)
    print(*cnt[1:])


if __name__ == "__main__":
    main()

### FIXED CODE ###

# ABC138D - Ki
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10 ** 7)

def dfs(v, p, tree, cnt):
    for u in tree[v]:
        if u != p:
            cnt[u] += cnt[v]
            dfs(u, v, tree, cnt)


def main():
    N, Q = tuple(map(int, input().split()))
    A = tuple(tuple(map(int, input().split())) for _ in range(N - 1))
    P = tuple(tuple(map(int, input().split())) for _ in range(Q))
    T = [[] for _ in range(N + 1)]  # T[i] := children of vertex i
    cnt = [0] * (N + 1)
    for a, b in A:  # set tree relations
        T[a] += [b]
        T[b] += [a]
    for p, x in P:  # increment on roots
        cnt[p] += x
    dfs(1, -1, T, cnt)
    print(*cnt[1:])


if __name__ == "__main__":
    main()
N, A, B = map(int,input().split())

if A == 0:
    print(0)
    exit()

s = N // (A+B)
p = (N%(A+B))
if p//A == 0:
    ans = s*A+p
elif p//A == 1:
    ans = s*A+A
print(ans)


### FIXED CODE ###

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

if A == 0:
    print(0)
    exit()

s = N // (A+B)
p = N%(A+B)
if p//A == 0:
    ans = s*A+p
else:
    ans = s*A+A
print(ans)
X,Y,Z,K = map(int, input().split())
a_list = [int(i) for i in input().split()]
b_list = [int(i) for i in input().split()]
c_list = [int(i) for i in input().split()]
a_list.sort(reverse = True)
b_list.sort(reverse = True)
c_list.sort(reverse = True)
total_list = [0 for _ in range(min(106307,X*Y*Z))]
for i in range(X):
    for j in range(Y):
        for k in range(Z):
            if (i+1)*(j+1)*(k+1) <= K:
                total_list[i*(Z*Y)+j*Z+k] = (a_list[i] + b_list[j] + c_list[k])
            else:
                break
total_list =  sorted(total_list, reverse = True)
for i in range(K):
    print(total_list[i])

### FIXED CODE ###

from heapq import heappush, heappop

# input
X,Y,Z,K = map(int, input().split())
a_list = [int(i) for i in input().split()]
b_list = [int(i) for i in input().split()]
c_list = [int(i) for i in input().split()]
a_list.sort(reverse = True)
b_list.sort(reverse = True)
c_list.sort(reverse = True)

#solve
hq = []
arg_hash = {}
val = a_list[0] + b_list[0] + c_list[0]
heappush(hq, (-val,0,0,0))

for i in range(K):
    ans, a, b, c = heappop(hq)
    print(-ans)

    arg_a = (a+1, b, c)
    arg_b = (a, b+1, c)
    arg_c = (a, b, c+1)

    if a < X-1 and arg_a not in arg_hash:
        arg_hash[arg_a] = 1
        heappush(hq, (-(a_list[a+1]+b_list[b]+c_list[c]),)+arg_a)
    if b < Y-1 and arg_b not in arg_hash:
        arg_hash[arg_b] = 1
        heappush(hq, (-(a_list[a]+b_list[b+1]+c_list[c]),)+arg_b)
    if c < Z-1 and arg_c not in arg_hash:
        arg_hash[arg_c] = 1
        heappush(hq, (-(a_list[a]+b_list[b]+c_list[c+1]),)+arg_c)
x, y, z, k = list(map(int, input().split()))
a = list(map(int, input().split()))
b = list(map(int, input().split()))
c = list(map(int, input().split()))

d = [e1+e2 for e1 in a for e2 in b]
d.sort(reverse=True)
d = d[:k]

e = [e1+e2 for e1 in d for e2 in c]
e.sort(reverse=True)

for i in range(k):
  print(e[i])

### FIXED CODE ###

a = []
for i in range(5):
  a.append(int(input()))
k = int(input())
if a[4]-a[0]<=k:
  print("Yay!")
else:
  print(":(")
str = input().split()
flag = 0
k = str[len(str)]
for i in range( 1,len(str) ):
  if str[i] - str[i-1] > k:
    flag = 1
if flag == 1:
  print(":(")
else:
  print("Yay!")

### FIXED CODE ###

A = []
for i in range(5):
  str = input()
  A.append(int(str))
K = int( input() )

if( A[4] - A[0] <= K):
  print("Yay!")
else:
  print(":(")
n = int(input())
l = list(map(int, input().split()))
t1 = []
t2 = []
for i in range(n):
    t1.append(l[i] + i)
    t2.append(i - l[i])
# print(t1, t2)
count = [0] * (2 * 100005)
for i in t1: count[i] -= -1
ans = 0
for i in t2:
    if i > 0:
        if count[i] != 0:
            ans += count[i]
print(ans)

### FIXED CODE ###

n = int(input())
l = list(map(int, input().split()))
t1 = []
t2 = []
for i in range(n):
    t1.append(l[i] + i)
    t2.append(i - l[i])
count = {}
for i in t1: count[i] = 0
for i in t2: count[i] = 0
for i in t1: count[i] -= -1
ans = 0
for i in t2:
    if i > 0:
        if count[i] != 0:
            ans += count[i]
print(ans)
# My answer. (In doubt!!)
# K, X = map(int, input().split())
# for i in range(X-K+1, K+X):
#     print(i, end=" ")

# This is the most optimal code as Coder I believe.
K, X = map(int, input().split())
l = max(-1000000, x - k + 1)
r = min(1000000, x + k - 1)
for i in range(l, r + 1):
    print(i)

# The official answer is as below.
# https://img.atcoder.jp/abc137/editorial.pdf



### FIXED CODE ###

K, X = map(int, input().split())
for i in range(X-K+1, K+X):
    print(i, end=" ")
import sys
import itertools
# import numpy as np
import time
import math
import heapq
from collections import defaultdict
from collections import Counter
sys.setrecursionlimit(10 ** 7)
 
INF = 10 ** 18
MOD = 10 ** 9 + 7
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

# map(int, input().split())

import sys
import itertools
# import numpy as np
import time
import math
from heapq import heappop, heappush
from collections import defaultdict
from collections import Counter
from collections import deque
sys.setrecursionlimit(10 ** 7)
 
INF = 10 ** 18
MOD = 10 ** 9 + 7
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

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

dp = [0] * (K + 1)
dp[0] = 1
for a in A:
    for i in range(K, 0, -1):
        if i >= a:
            dp[i] += dp[i - a]
ans = 0
for a in A:
    x = K - a
    necessary = False
    for i in range(x, K):
        if i >= a:
            if dp[i] - dp[i - a] >= 1:
                necessary = True
        else:
            if dp[i] >= 1:
                necessary = True
    if necessary:
        ans += 1
print(N - ans)

### FIXED CODE ###

import sys
import itertools
# import numpy as np
import time
import math
import heapq
from collections import defaultdict
from collections import Counter
sys.setrecursionlimit(10 ** 7)
 
INF = 10 ** 18
MOD = 10 ** 9 + 7
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

# map(int, input().split())

import sys
import itertools
# import numpy as np
import time
import math
from heapq import heappop, heappush
from collections import defaultdict
from collections import Counter
from collections import deque
sys.setrecursionlimit(10 ** 7)
 
INF = 10 ** 18
MOD = 10 ** 9 + 7
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

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

def check(x):
    if A[x] >= K:
        return True
    dp = [False] * (K + 1)
    dp[0] = True
    for j, a in enumerate(A):
        if j == x:
            continue
        for i in range(K, 0, -1):
            if i >= a:
                dp[i] |= dp[i - a]
    for i in range(K - A[x], K):
        if dp[i]:
            return True
    return False
left = -1
right = N
while right - left > 1:
    mid = (left + right) // 2
    if check(mid):
        right = mid
    else:
        left = mid
print(right)
ans = 0
5hun = int(input())
hun = int(input())
fif = int(input())
money = int(input())
for i in range(5hun + 1):
  for j in range(hun + 1):
    for l in range(fif + 1):
      if (500 * i + 100 * j + 50 * l) == money:
        ans += 1
print(ans)

### FIXED CODE ###

ans = 0
fhun = int(input())
hun = int(input())
fif = int(input())
money = int(input())
for i in range(fhun + 1):
  for j in range(hun + 1):
    for l in range(fif + 1):
      if (500 * i + 100 * j + 50 * l) == money:
        ans += 1
print(ans)
n,k=(map(int,input().split())
print(min(n%k,k-n%k))

### FIXED CODE ###

n,k=map(int,input().split())
print(min(n%k,abs(n%k-k)))
from collections import Counter
N=int(input())
S=[0]*5000
S=list(input())

S_count=Counter(S)
r=S_count["R"]
g=S_count["G"]
b=S_count["B"]

ans=0

for i in range(N-2):
    for j in range(1,N):
        if i+2*j>=N:
            break
        if S[i]!=S[i+j] and S[i+j]!=S[i+2*j] and S[i]!=S[i+2*j]:
            ans+=1

print(r*g*b-ans)

### FIXED CODE ###

import sys
K=str(input())
K=list(K) #いらないかも
K=[int(i) for i in K]

for i in K:
    if i==7:
        print("Yes")
        sys.exit()
print("No")
while True:
    x=input()
    if x=="0 ? 0":
        break
    print(eval(x.replace("/","//")))

### FIXED CODE ###

while True:
    x=input()
    if "?" in x:
        break
    print(int(eval(x.replace("/","//"))))
n = input()
op_cnt = len(n) - 1
for i in range(2 ** op_cnt):
  op = ['-'] * op_cnt#['-', '-', '-']
  for j in range(op_cnt):
    if ((i >> j) & 1):
      op[-1-j] = '+'
      formula = ''
  for p_n, p_o in zip(n, op + ['']):#(1,+),(2,+),(3,+),(4,'')
    formula += (p_n + p_o)
  if eval(formula) == 7:#'1+2+3+4'
    print(formula + '=7')
    break

### FIXED CODE ###

n = input()
op_cnt = len(n) - 1
for i in range(2 ** op_cnt):
  op = ['-'] * op_cnt#['-', '-', '-']
  for j in range(op_cnt):
    if ((i >> j) & 1):
      op[-1-j] = '+'
  formula = ''
  for p_n, p_o in zip(n, op + ['']):#(1,+),(2,+),(3,+),(4,'')
    formula += (p_n + p_o)
  if eval(formula) == 7:#'1+2+3+4'
    print(formula + '=7')
    break
s=input()

n=int(input())

ss = s+s[0]

ss=list(ss)

ss.reverse()

if ss[0] == ss[1] and ss[1] != ss[2]:
    sa = 1
else:
    sa = 0

count = 0

for i in range(1,len(ss)):
    if ss[i] == ss[i-1]:
        ss[i] = '!'
        count += 1
print(count*n-sa)
    

### FIXED CODE ###

S=input()
K=int(input())

if list(S).count(S[0])==len(S):
    print(len(S)*K//2)

else:
    S_count=0
    i=0
    while i<len(S)-1:
        if S[i]==S[i+1]:
            S_count+=1
            i+=1
        i+=1

    if S[0]==S[-1]:
        a=1
        i=0
        while i<len(S)-1:
            if S[i]==S[i+1]:
                a+=1
                i+=1
            else:
                break
        b=1
        i=len(S)-1
        while i>0:
            if S[i]==S[i-1]:
                b+=1
                i+=-1
            else:
                break

        S_count*=K
        S_count-=(K-1)*(a//2 + b//2 - (a+b)//2)

    else:
        S_count*=K
    print(S_count)
N = input()
if N % 2 == 1:
	n = N + 1
else:
	n = N
print(int(n / 2))

### FIXED CODE ###

N = int(input())
if N % 2 == 1:
	n = N + 1
else:
	n = N
print(int(n / 2))
from collections import deque

dis_x = [1, 0, -1, 0]
dis_y = [0, 1, 0, -1]

goal_h, goal_w = map(int, input().split())

s = []
for _ in range(goal_h):
    line = input()
    s.append(list("#{}#".format(line)))

s = [list("#" * (goal_w + 2))] + s + [list("#" * (goal_w + 2))]

dist = [ [0] * (goal_w + 2) for _ in range(goal_w+2)]

que = deque([(1, 1)])

while que:
    h, w = que.popleft()

    for i in range(4):
        dx, dy = dis_x[i], dis_y[i]
        if s[h+dy][w+dx] == '.' and  dist[h+dy][w+dx] == 0:
            dist[h+dy][w+dx] = dist[h][w]+1
            que.append((h+dy, w+dx))

opt = dist[goal_h][goal_w]

not_wall_count = 0
for i in range(1, goal_h+1):
    for j in range(1, goal_w+1):
        if s[i][j] == '.':
            not_wall_count += 1

if opt == -1:
    print(-1)
else:
    print(not_wall_count - opt - 1)

### FIXED CODE ###

from collections import deque
H, W = map(int, input().split())
S = [input() for i in range(H)]
C = sum(s.count('.') for s in S)

dd = ((-1, 0), (0, -1), (1, 0), (0, 1))
que = deque([(0, 0, 0)])
used = {(0, 0)}

res = None
while que:
    s, t, cost = que.popleft()
    if s == H-1 and t == W-1:
        res = cost
        break
    for di, dj in dd:
        ni = s + di; nj = t + dj
        if (not 0 <= ni < H) or (not 0 <= nj < W) or S[ni][nj] == '#' or (ni, nj) in used:
            continue
        used.add((ni, nj))
        que.append((ni, nj, cost + 1))
if res:
    print(C - 1 - res)
else:
    print(-1)
import collections
N = int(input())
A=[]
for i in range(N):
    x= sorted(list(input()))
    A.append(x)
B=collections.Counter(A)
ans = 0
for i in B.values():
    ans += i*(i-1)//2
print(ans)

### FIXED CODE ###

import collections
N = int(input())
A=[]
for i in range(N):
    x= str(sorted(input()))
    A.append(x)
B=collections.Counter(A)
ans = 0
for i in B.values():
    ans += i*(i-1)//2
print(ans)
a=input()
b=input()

c=int(a)*int(b)

if c%2 ==0:
    print('Even')
else:
    print('Odd')

### FIXED CODE ###

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


if (a*b)%2 ==0:
    print('Even')
else:
    print('Odd')
import math

a,b,c,d=map(int,input().split())
cnt=0

cc=b//c-(a-1)//c
dd=b//d-(a-1)//d
ee=b//(c * d // math.gcd(c, d))-(a-1)//(c * d // math.gcd(c, d))
    
print(cc,dd,ee)
print((b-a+1)-(cc+dd-ee))

### FIXED CODE ###

import fractions

a,b,c,d=map(int,input().split())
cnt=0

cc=b//c-(a-1)//c
dd=b//d-(a-1)//d
ee=b//(c * d // fractions.gcd(c, d))-(a-1)//(c * d // fractions.gcd(c, d))
    
print((b-a+1)-(cc+dd-ee))
s = input()
s1 = []
le = []
lex = []
cnt= 0
for i in list(s):
  if i!="x":
    le.append(cnt)
    s1.append(i)
  else:
    lex.append(cnt)
  cnt+=1
if s1!=s1[::-1]:
  print(-1)
  exit()
midlle=le[len(le)//2]
ans =[]
for i in lex:
  ans.append(abs(i-midlle))
ans = list(set(ans))
print(len(ans))

### FIXED CODE ###

s = list(input())
s1=s[::-1]
ans = 0
cnt = 0
cnt1 = 0
while cnt<len(s) and cnt1<len(s) and cnt<=len(s)-1-cnt1:
  if s[cnt]!=s1[cnt1]:
    if s[cnt]=="x" and s1[cnt1]!="x":
      cnt+=1
      ans+=1
    elif s1[cnt1]=="x" and s[cnt]!="x":
      cnt1+=1
      ans+=1
    elif s[cnt]!="x" and s1[cnt1]!="x":
      print(-1)
      exit()
  elif s[cnt]==s1[cnt1]:
    cnt+=1
    cnt1+=1
print(ans)
import sys


def _i(): return int(sys.stdin.readline().strip())


def _ia(): return [int(x) for x in sys.stdin.readline().strip().split()]


def main():
    n, p = _ia()
    u = [1 if i == 0 else 0 for i in range(p)]
    s = _i()
    cnt = 0
    if p == 2 or p == 5:
        for i, c in enumerate(s):
            if int(c) % p == 0:
                cnt += i + 1
        return cnt

    m = 10
    for _ in range(n):
        ui = (s % m) % p
        cnt += u[ui]
        u[ui] += 1
        m *= 10

    return cnt


if __name__ == "__main__":
    print(main())


### FIXED CODE ###

import sys


def _s(): return sys.stdin.readline().strip()


def _ia(): return map(int, sys.stdin.readline().strip().split())


n, p = _ia()
u = [1 if i == 0 else 0 for i in range(p)]
s = _s()
cnt = 0
if p == 2 or p == 5:
    for i, c in enumerate(s):
        if int(c) % p == 0:
            cnt += i + 1
else:
    b = 1
    m10 = 10 % p
    prev = 0
    for c in s[::-1]:
        ui = prev = (prev + int(c) * b) % p
        b = (b*m10) % p
        cnt += u[ui]
        u[ui] += 1
print(cnt)
N = int(input())
if N == 1:
    print(0)
    exit()

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

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

    if len(arr) == 0:
        arr.append([n, 1])

    return arr


tmp = f(N)
res = 0
A = [0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5]
for b, a in tmp:
    res += A[a]

print(int(res))


### FIXED CODE ###

import math

def f(n):
    arr = list()
    temp = n
    for i in range(2, int(math.sqrt(n)) + 1):
        if temp % i == 0:
            cnt = 0
            while temp % i == 0:
                cnt += 1
                temp //= i
            arr.append(tuple([i, cnt]))

    if temp != 1:
        tup = tuple([temp, 1])
        arr.append(tup)

    if len(arr) == 0:
        tup = tuple([n, 1])
        arr.append(tup)

    return arr

N = int(input())
if N == 1:
    print(0)
    exit()

t = f(N)
res = 0

for a in t:
    cnt = 0
    c = 0
    while cnt <= a[1]:
        c += 1
        cnt += c
    res += c - 1
    
print(res)