Harryxun/stf_run huggingface dataset:
N = int(input())
S = list(input())
before = ""
after = ""
if N % 2 != 0:
  print("No")
else:
  for i in range N//2:
  	before += S[i]
  for j in range(N//2, N):
    after += S[j]
  if before == after:
    print("Yes")
  else:
    print("No")
    

### FIXED CODE ###

N = int(input())
S = list(input())
before = ""
after = ""
if N % 2 != 0:
  print("No")
else:
  for i in range(N//2):
  	before += S[i]
  for j in range(N//2, N):
    after += S[j]
  if before == after:
    print("Yes")
  else:
    print("No")
a,b = map(int,input().split())
yakusuu = []
ans = 1
for i in range (2,min(a,b)+1):
         if a % i == 0 and b% i == 0:
                  yakusuu.append(i)
for j in range(len(yakusuu)):
         for k in range(2,yakusuu[j]**(1/2)):
                  if yakusuu[j] % k == 0:
                           break
         else:
                  ans += 1
print(ans)


### FIXED CODE ###

aa,bb = map(int,input().split())
n = min(aa,bb)
b = max(aa,bb)
ans = 1
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)

if temp!=1:
         arr.append(temp)

if arr==[] and n != 1:
         arr.append(n)

for j in range(len(arr)):
         if b % arr[j] == 0:
                  ans += 1
print (ans)
n,t = map(int,input().split())
a = list(map(int,input().split()))
ma = inf
benefit = 0
ans = 1
for i in range(n):
    if a[i] < ma:
        ma = a[i]
    else:
        b = a[i]-ma
        if b == benefit:
            ans += 1

        if b > benefit:
            benefit = b
            ans = 1
print(ans)

### FIXED CODE ###

inf = 10**18
mod = 10**9+7

n,t = map(int,input().split())
a = list(map(int,input().split()))
ma = inf
benefit = 0
ans = 1
for i in range(n):
    if a[i] < ma:
        ma = a[i]
    else:
        b = a[i]-ma
        if b == benefit:
            ans += 1

        if b > benefit:
            benefit = b
            ans = 1
print(ans)
A = str(input())
B = str(input())
C = str(input())
X=A
while True:
    if X == "a":
        X = A[0]
        A.pop(0)
        if len(A) == 0:
            print("A")
            break
    elif X == b:
        X = B[0]
        B.pop(0)
        if len(B) == 0:
            print("B")
            break
    else:
        X = C[0]
        C.pop(0)
        if len(C) == 0:
            print("C")
            break

### FIXED CODE ###

A = list(str(input()))
B = list(str(input()))
C = list(str(input()))
X="a"
while True:
    if X == "a":
        if len(A) == 0:
            print("A")
            break
        X = A[0]
        A.pop(0)
    elif X == "b":
        if len(B) == 0:
            print("B")
            break
        X = B[0]
        B.pop(0)
    else:
        if len(C) == 0:
            print("C")
            break
        X = C[0]
        C.pop(0)
a, b = map(int, input().solid())
if (a + b) % 2 == 0 :
  print((a + b) % 2)
else
  print("IMPOSSIBLE")


### FIXED CODE ###

a, b = map(int, input().split())
if (a + b) % 2 == 0 :
  print((a + b) // 2)
else :
  print("IMPOSSIBLE")
n, m, p = [int(i) for i in input().split()]
e = [[int(i) for i in input().split()] for _ in range(m)]

for i in e:
    i[0] -= 1
    i[1] -= 1
    i[2] -= p

d = [0] * n
ok = [False] * n
ok[0] = True

for _ in range(n):
    for a, b, c in e:
        if ok[a]:
            d[b] = max(d[b], d[a] + c)
            ok[b] = True

aa = d[-1]

for _ in range(2*n):
    for a, b, c in e:
        if ok[a]:
            d[b] = max(d[b], d[a] + c)
            ok[b] = True

bb = d[-1]

if aa != bb:
    print("-1")
else:
    print(max(aa, 0))


### FIXED CODE ###

n = int(input())
s1 = input()
s2 = input()
mod = 10**9+7
ans = 3
i = 0
j = -1
while i < n:
    if s1[i] == s2[i]:
        if j == 0:
            ans *= 2
        i += 1
        j = 0
    else:
        if j == 1:
            ans *= 3
        else:
            ans *= 2
        j = 1
        i += 2
    ans %= mod
print(ans)
N,M = map(int,input().split())
S = input()
T = input()
from fractions import gcd
L = N*M//gcd(N,M)
res = ['!']*(L+100)
cnt1 = 0
for s in S:
    if cnt1*L//N > L:
        print(-1)
        exit()
    res[cnt1*L//N] = s
    cnt1 += 1
cnt2 = 0
for t in T:
    if cnt2*L//M > L:
        print(-1)
        exit()
    if res[cnt2*L//M] == '!' or res[cnt2*L//M] == t:
        res[cnt2*L//M] = t
        cnt2 += 1
    else:
        print(-1)
        exit()
print(L) 

### FIXED CODE ###

N,M = map(int,input().split())
S = input()
T = input()
from fractions import gcd
G = gcd(N,M)
if S[::N//G] == T[::M//G]:
    print(N*M//G)
else:
    print(-1)
from collections import deque   
n = int(input())
d = deque()
for _ in range(n):
    x = input().split()
    if (command[0][0] == 'i'):
        d.appendleft(int(x[1]))
    elif (command[0] == 'delete'):
        try:
            d.remove(int(x[1]))
        except ValueError:
            pass
    elif (x[0][6] == 'F'):
        d.popleft()
    else:
        d.pop()
print(*d)




### FIXED CODE ###

from collections import deque
n = int(input())
a = deque()
for i in range(n):
    c = input()
    if c == "deleteFirst":
        a.popleft()
    elif c == "deleteLast":
        a.pop()
    else:
        c, v = c.split()
        if c == "insert":
            a.appendleft(v)
        else:
            try:
                a.remove(v)
            except:
                pass
print(" ".join(a))
o = input()
e = input()
list = []
for i in range(len(o)-1):
  list.append(o[i] + e[i])
  
if len(e) == len(o):
  list.append(o[len(e)] + e[len(o)])
else:
  list.append(o[len(e)])
  
 
print(*list, sep='')

### FIXED CODE ###

o = input()
e = input()
list = []
for i in range(len(o)-1):
  list.append(o[i] + e[i])
  
if len(e) == len(o):
  list.append(o[len(o)-1] + e[len(e)-1])
else:
  list.append(o[len(o)-1])
  
 
print(*list, sep='')
a=int(input())
s=input()
if (a>=3200):
   print(s)
else:
   print(red)

### FIXED CODE ###

a=int(input())
s=input()
if (a>=3200):
   print(s)
else:
   print("red")
a,b=map(int,input().split())
if a==b:
  print(2*a):
else:
  print(2*max(a,b)-1)

### FIXED CODE ###

a,b=map(int,input().split())
if a==b:
  print(2*a)
else:
  print(2*max(a,b)-1)
N=1079

a = N/1.08

a1 = round(a)

a2 = int(a1*1.08)

if a2 == N:
    print(a1)
else:
    print(:()


### FIXED CODE ###

import math
import sys
N = int(input())

for i in range(1,50001):
    if math.floor(i * 1.08) == N:
        print(i)
        sys.exit()

print(":(")
# -*- coding: utf-8 -*-

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

lamps = [list(map(lambda x: int(x)-1, input().split()))[1:] for _ in range(n)]
p = list(map(int, input().split()))

ans = 0

for i in range(1 << n):
    for r in range(m):
        on_sum=0
        for j in range(n):
            if i >> j & 1 and j in lamps[r]:
                on_sum += 1

        if on_sum % 2 != p[r]:
            break

    else:
        ans += 1

print(ans)


### FIXED CODE ###

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

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

lamps = [list(map(lambda x: int(x)-1, input().split()))[1:] for _ in range(m)]
p = list(map(int, input().split()))

ans = 0

for i in range(1 << n):
    for r in range(m):
        on_sum=0
        for j in range(n):
            if i >> j & 1 and j in lamps[r]:
                on_sum += 1

        if on_sum % 2 != p[r]:
            break

    else:
        ans += 1

print(ans)
import math
class Graph(object):
    def __init__(self,v):
        self.v = v
        self.visited = [False for i in range(v)]
        self.adj = [[] for i in range(v)]
        self.parent = [-1 for i in range(v)]
        self.distance = [0 for i in range(v)]

    def AddEdge(self,a,b):
        self.adj[a].append(b)
        self.adj[b].append(a)

    def BFS(self,start):
        Q = [start]
        self.visited[start] = True
        while len(Q)>0:

            cur = Q.pop(0)
            for child in self.adj[cur]:
                if self.visited[child]==False:
                    self.visited[child] = True
                    self.distance[child] = self.distance[cur]+1
                    self.parent[child] = cur
                    Q.append(child)

    def CycleDetection_Using_BFS(self,start):
        Q = [start]
        self.visited[start] = True
        while len(Q)>0:

            cur = Q.pop(0)
            for child in self.adj[cur]:
                if self.visited[child]==False:
                    self.visited[child] = True
                    self.distance[child] = self.distance[cur]+1
                    self.parent[child] = cur
                    Q.append(child)
                else:
                    if self.parent[cur]!=child:
                        return True

        return False

NK= list(map(int,input().split(' ')))
n,k = NK[0] , NK[1]
h = list(map(int,input().split(' ')))

dp = {}
def Frog2(i):
   if i==n-1:
       return 0
   if i in dp:
       return dp[i]
   m = math.inf
   for j in range(1,k+1):
       if i+j<=n-1:
           m = min(m,Frog2(j+i)+abs(h[i]-h[j+i]))
   dp[i] = m
   return dp[i]
print(Frog2(0))




### FIXED CODE ###

import math
from functools import lru_cache
def Frog1():
    n = int(input())
    h = list(map(int,input().split(' ')))
    @lru_cache(None)
    def Solve(i):
        if i==n-1:
            return 0
        if i==n-2:
            return abs(h[i]-h[i+1])
        return min(Solve(i+1)+abs(h[i]-h[i+1]),Solve(i+2)+abs(h[i]-h[i+2]))
    dp = [0]*n
    for i in reversed(range(n)):
        if i==n-1:
            dp[i] = 0
        elif i==n-2:
            dp[i] = abs(h[i]-h[i+1])
        else:
            dp[i] = min(dp[i+1]+abs(h[i]-h[i+1]),dp[i+2]+abs(h[i]-h[i+2]))
    print(dp[0])
def Frog2():
    n,k = input().split(' ')
    n,k = int(n),int(k)
    h = list(map(int, input().split(' ')))
    @lru_cache(None)
    def Solve(i):
        if i==n-1:
            return 0
        ans = math.inf
        for j in range(1,k+1):
            new_i = i+j
            if new_i<=n-1:
                ans = min(ans , Solve(new_i)+abs(h[i]-h[new_i]))
            else:
                break
        return ans

    dp = [0]*n
    for i in reversed(range(n)):
        if i==n-1:
            dp[i] = 0
        else:
            ans = math.inf
            for j in range(1,k+1):
                new_i = i+j
                if new_i<=n-1:
                    ans = min(ans,dp[new_i]+abs(h[i]-h[new_i]))
                else:
                    break
            dp[i] = ans
    print(dp[0])

Frog2()
n,m=map(int,input().split())
graph=[[]*n for _ in range(n)]
for _ in range(n):
    a,b=map(int,input().split())
    graph[a-1].append(b-1)
    graph[b-1].append(a-1)

def dfs(v, seen):
    if all(seen):
        return 1
    ans=0
    for vv in graph[v]:
        if seen[vv]:
            continue
        seen[vv]=True
        ans+=dfs(vv, seen)
        seen[vv]=False
    return ans

seen=[False]*n
seen[0]=True
print(dfs(0, seen))


### FIXED CODE ###

n,m=map(int,input().split())
graph = [[] for _ in range(n)]
for i in range(m):
    a, b=map(int, input().split())
    graph[a-1].append(b-1)
    graph[b-1].append(a-1)

def dfs(v, seen):
    if all(seen):
        return 1
    ans=0
    for i in graph[v]:
        if seen[i]:
            continue
        seen[i]=True
        # print(seen)
        ans+=dfs(i, seen)
        seen[i]=False
    return ans

seen=[False]*n
seen[0]=True
print(dfs(0, seen))
input_num = int(input())
num_sqrt = int(math.sqrt(input_num))

minimam = input_num
for i in range(num_sqrt+1,0,-1):
    q, mod = divmod(input_num, i)
    if mod == 0:
        distance = q + i -2
        if minimam > distance:
            minimam = distance
print(minimam)

### FIXED CODE ###

num = int(input())
minimam = 10**12
for i in range(1,10**6+1):
    q, mod = divmod(num, i)
    distance = q + i -2
    if mod == 0 and minimam > distance:
        minimam = distance
print(minimam)
r = input()

if r < 1200:
    print("ABC")
elif r < 2800:
    print("ARC")
else:
    print("AGC")


### FIXED CODE ###

r = int(input())

if r < 1200:
    print("ABC")
elif r < 2800:
    print("ARC")
else:
    print("AGC")
from collections import defaultdict
from pprint import pprint
from scipy.special import comb

n = int(input())

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

a_dict = defaultdict(int)

for i in a_list:
    a_dict[i] += 1

#pprint(a_dict)

#総数から(a_dict[k]-1)の値を引いていく。
#例えば5C2のものが一つ減った場合、4C2になる。この差分は5C2-4C2=10-6=4 
#例えば6C2のものが一つ減った場合、5C2になる。この差分は6C2-5C2=15-10=5 
#例えば7C2のものが一つ減った場合、6C2になる。この差分は7C2-6C2=21-15=6

total = 0

#組み合わせの総数を求める。
for j in a_dict.values():
    total += comb(j,2)

for k in a_list:
    print(int(total - (a_dict[k]-1)))

### FIXED CODE ###

from collections import defaultdict
from pprint import pprint
#from scipy.special import comb

n = int(input())

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

a_dict = defaultdict(int)

for i in a_list:
    a_dict[i] += 1

#pprint(a_dict)

#総数から(a_dict[k]-1)の値を引いていく。
#例えば5C2のものが一つ減った場合、4C2になる。この差分は5C2-4C2=10-6=4 
#例えば6C2のものが一つ減った場合、5C2になる。この差分は6C2-5C2=15-10=5 
#例えば7C2のものが一つ減った場合、6C2になる。この差分は7C2-6C2=21-15=6

total = 0

#組み合わせの総数を求める。
for j in a_dict.values():
    total += j*(j-1)/2

for k in a_list:
    print(int(total - (a_dict[k]-1)))
N=int(input())
E=[[] for _ in range(N)]
for i in range(N-1):
  a,b = map(int, input().split())
  E[a-1].append((b-1,i))
  E[b-1].append((a-1,i))
ans=[[] for _ in range(N-1)]
def sub(p, n):
  m=1
  for a,b in E[p]:
    if not ans[b]:
      if m == n: m+=1
      ans[b]=m
      sub(a,m)
      m+=1
sub(0,0)
print(max(ans))
for a in ans:
  print(a)

### FIXED CODE ###

import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**9)

N=int(input())
E=[[] for _ in range(N)]
for i in range(N-1):
  a,b = map(int, input().split())
  E[a-1].append((b-1,i))
ans=[[] for _ in range(N-1)]
def sub(p, n):
  m=1
  for b,i in E[p]:
    if m == n: m+=1
    ans[i]=m
    sub(b,m)
    m+=1
sub(0,0)
print(max(ans))
for a in ans:
  print(a)
a,b=input(int())
if (a*b)%2==0:
    print("偶数")
else:
    print("奇数")

### FIXED CODE ###

a, b = map(int, input().split())
answer = a * b
if answer % 2 == 0:
    print('Even')
else:
    print('Odd')
import math
N,M= list(map(int,input().split()))
S =input()
T=input()


L = N*M//math.gcd(N,M)

d = dict()

for i in range(N):
    print(1+(L//N)*i)
    index = 1+(L//N)*i
    d[index] = S[i]

for j in range(M):
    index = (1+(L//M)*j)
    if index in d:
        if d[index]!=T[j]:
            print(-1)
            exit()
print(L)




### FIXED CODE ###

import math

N, M = list(map(int, input().split()))
S = input()
T = input()
def gcd(a, b):
    if a < b:
        a, b = b, a
    if b == 0:
        return a
    c = a % b
    return gcd(b, c)

L = N * M // gcd(N, M)

d = dict()

for i in range(N):
    index = 1 + (L // N) * i
    d[index] = S[i]

for j in range(M):
    index = (1 + (L // M) * j)
    if index in d:
        if d[index] != T[j]:
            print(-1)
            exit()
print(L)
a = 0
for i in range(1,int(input())+1):
  b = int(input())
  a += 1/b
a = 1/a

### FIXED CODE ###

a = 0
b = int(input())
c = list(map(int,input().split()))
for i in range(b):
  a += 1/c[i]
b = 1/a
print(b)
string = input()
num = int(input())

count=1
out =''
for s in string:
    if count==num:
        out=out+string[len(out)*num]
        count=1
    count=count+1
print(out)


### FIXED CODE ###

l = input().split()
if int(l[0])+int(l[1])==15:
    print('+')
elif int(l[0])*int(l[1]) ==15:
    print('*')
else:
    print('x')
#import sys
#import numpy as np
import math
#from fractions import Fraction
import itertools
from collections import deque
from collections import Counter
#import heapq
from fractions  import gcd
#input=sys.stdin.readline
import bisect
n=int(input())
a=list(map(int,input().split()))

Mod=10**9+7
M=10**6 #書き換え
fac=[0]*M
finv=[0]*M
inv=[0]*M

#finvに逆元、facに階乗のmod
def COMinit():
  fac[0]=fac[1]=1
  finv[0]=finv[1]=1
  inv[1]=1
  for i in range(2,M):
    fac[i]=(fac[i-1]*i%Mod)%Mod
    inv[i]=Mod-inv[Mod%i]*(Mod//i) %Mod
    finv[i]=(finv[i-1]*inv[i]%Mod)%Mod
def COM(n,k):
  if n<k:
    return 0
  if n<0 or k<0:
    return 0
  return (fac[n]*(finv[k]*finv[n-k]%Mod)%Mod)%Mod

COMinit()

def factorize(n):
    fct={}
    temp=n
    if temp<4:
        fct[temp]=1
    else:
        e=0
        while temp%2==0:
            temp=temp//2
            e+=1
        if e>0:
            fct[2]=e
    
    for b in range(3,int(n**0.5)+1,2):
        e=0
        while temp%b == 0:
            temp=temp//b
            e+=1
        if e>0:
            fct[b]=e
    if temp!=1:
        fct[temp]=1
    return fct

res={}
for i in a:
    f=factorize(i)
    for j in f:
        if j not in res:
            res[j]=f[j]
        else:
            res[j]=max(res[j],f[j])
c=1
ans=0
for i in res:
    c*=pow(i,res[i],Mod)
    c%=Mod
for i in a:
    ans+=c*inv[i]
    ans%=Mod
print(ans)


### FIXED CODE ###

#import sys
#import numpy as np
import math
#from fractions import Fraction
import itertools
from collections import deque
from collections import Counter
#import heapq
from fractions  import gcd
#input=sys.stdin.readline
import bisect
n=int(input())
a=list(map(int,input().split()))

Mod=10**9+7
M=10**6+2 #書き換え
fac=[0]*M
finv=[0]*M
inv=[0]*M

#finvに逆元、facに階乗のmod
def COMinit():
  fac[0]=fac[1]=1
  finv[0]=finv[1]=1
  inv[1]=1
  for i in range(2,M):
    fac[i]=(fac[i-1]*i%Mod)%Mod
    inv[i]=Mod-inv[Mod%i]*(Mod//i) %Mod
    finv[i]=(finv[i-1]*inv[i]%Mod)%Mod
def COM(n,k):
  if n<k:
    return 0
  if n<0 or k<0:
    return 0
  return (fac[n]*(finv[k]*finv[n-k]%Mod)%Mod)%Mod

COMinit()

def factorize(n):
    fct={}
    temp=n
    if temp<4:
        fct[temp]=1
    else:
        e=0
        while temp%2==0:
            temp=temp//2
            e+=1
        if e>0:
            fct[2]=e
    
    for b in range(3,int(n**0.5)+1,2):
        e=0
        while temp%b == 0:
            temp=temp//b
            e+=1
        if e>0:
            fct[b]=e
    if temp!=1:
        fct[temp]=1
    return fct

res={}
for i in a:
    f=factorize(i)
    for j in f:
        if j not in res:
            res[j]=f[j]
        else:
            res[j]=max(res[j],f[j])
c=1
ans=0
for i in res:
    c*=pow(i,res[i],Mod)
    c%=Mod
for i in a:
    ans+=c*inv[i]
    ans%=Mod
print(ans)
a = int(input())
b = int(input())
c = int(input())
a2 = 0
l = []

while a > 0:
    a1 = a
    while a1 > 1:
        l.append(int(a1 % 10))
        a1 = a1 / 10
    if sum(l) >= b and sum(l) <= c:
        a2 = a2 + a
    l = []
    a = a - 1
print(a2)

### FIXED CODE ###

a, b, c = map(int, input().split())
a2 = 0

while a > 0:
    a1 = a
    l = []
    while a1 >= 1:
        l.append(int(a1 % 10))
        a1 = a1 / 10
    if sum(l) >= b and sum(l) <= c:
        a2 = a2 + a

    a = a - 1
print(a2)
n = input()
h = input().split()

hl = [int(int(h[i+1]) - int(h[i]) <= 0) for i in range(len(h) - 1)]
res = []
ct = 0

for i in range(len(hl) - 1):
  if hl[i] == 1:
    ct = ct + 1
  else:
    res.append(ct)
    ct = 0
    
if hl[len(hl) - 1] == 1:
  ct = ct + 1
else:
  pass

res.append(ct)
    
if len(res) == 0:
  print(0)
elif len(res) == 1:
  print(res[0])
else:
  print(max(res))

### FIXED CODE ###

n = input()
h = input().split()
res = []
ct = 0

for i in range(len(h) - 1):
  if int(h[i]) >= int(h[i+1]):
    ct = ct + 1
  else:
    res.append(ct)
    ct = 0

res.append(ct)

print(max(res))
s=input()
if s="111":
  print(3)
elif s="110" or "101" or "011":
  print(2)
elif s="100" or "010" or "001":
  print(1)
else:
  print(0)

### FIXED CODE ###

s=input()
print(s.count("1"))
n = int(input())
m = list(n)

if m.count(7)>0:
    print("Yes")
else:
    print("No")

### FIXED CODE ###

n = int(input())
m = str(n)
l = list(m)
if l.count("7")>0:
    print("Yes")
else:
    print("No")
S = input()

B_num = S.count("B")
W_num = S.count("W")

B_start = W_num # 一番左のBがいていいindex

res = 0
for i in range(B_start + 1):
    if S[i] == "B":
        res += B_start - i
        B_start += 1
        while(B_start < len(S) and S[B_start] == "B"):
            B_start += 1

print(res)

### FIXED CODE ###

S = input()

B_num = S.count("B")
W_num = S.count("W")

B_start = W_num # 一番左のBがいていいindex

res = 0
for i in range(B_start + 1):
    if i == len(S):
        break
    if S[i] == "B":
        res += B_start - i
        B_start += 1
        while(B_start < len(S) and S[B_start] == "B"):
            B_start += 1

print(res)
k = list(map(int,input().splitlines()))

print(-(-(k[0]+k[1])//2)

### FIXED CODE ###

k = list(map(int,input().split()))
print(-(-(k[0]+k[1])//2))
def Euclid(a,b):
  r = a % b
  if r == 0:
    return b
  return Euclid(b,r)
import fractions

a,b = map(int,input().split())
#c = Euclid(a,b) if a > b else Euclid(b,a)
c = fractions.gcd(a,b)

def factorization(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 arr==[]:
        arr.append([n, 1])

    return arr
  
if c == 1:
  print(1)
else:
  print(len(factorization(c))+1)



### FIXED CODE ###

n = int(input())
print((n- n//2)/n)
import numpy as np


def div(n, d):
    if d == 2:
        return format(n, "b")[::-1].find("1")
    cnt = 0
    while n % d == 0:
        n //= d
        cnt += 1
    return cnt


n = int(input())

arr2 = []
arr5 = []
for _ in range(n):
    x = round(float(input()) * 10**9)
    arr2.append(div(x, 2))
    arr5.append(div(x, 5))

arr2 = (np.array(arr2) + np.zeros([arr.shape[0], arr.shape[0]], np.int64)).astype(np.int32)
arr5 = (np.array(arr5) + np.zeros([arr.shape[0], arr.shape[0]], np.int64)).astype(np.int32)

arr2 = np.tril(arr2 + arr2.T)
arr2 -= arr2.T
arr5 = np.tril(arr5 + arr5.T)
arr5 -= arr5.T

result = (arr2 >= 18).astype(np.int32) + (arr5 >= 18).astype(np.int32)

print(np.sum(result >= 2))

### FIXED CODE ###

def div(n, d):
    cnt = 0
    while n % d == 0 and cnt < 18:
        n //= d
        cnt += 1
    return cnt


n = int(input())
dp = [[0]*19 for _ in range(19)]

ans = 0
for _ in range(n):
    x = round(float(input()) * pow(10, 9))
    two = div(x, 2)
    five = div(x, 5)
    ans += dp[18 - two][18 - five]
    for i in range(two + 1):
        for j in range(five + 1):
            dp[i][j] += 1

print(ans)
#一個だけRE、わからねえ
#解答見る
import sys
sys.setrecursionlimit(1005)
h,w=map(int,input().split())

def go_next(I,J,n):
    n+=1
    global dp,w,h
    if n>1000:
        return
    if 0<=I<h-1:
        if x[I+1][J]=="." and dp[I+1][J]>dp[I][J]+1:
            dp[I+1][J]=dp[I][J]+1
            go_next(I+1,J)
    if 0<I<=h-1:
        if x[I-1][J]=="." and dp[I-1][J]>dp[I][J]+1:
            dp[I-1][J]=dp[I][J]+1
            go_next(I-1,J)
    if 0<=J<w-1:
        if x[I][J+1]=="." and dp[I][J+1]>dp[I][J]+1:
            dp[I][J+1]=dp[I][J]+1
            go_next(I,J+1)
    if 0<J<=w-1:
        if x[I][J-1]=="." and dp[I][J-1]>dp[I][J]+1:
            dp[I][J-1]=dp[I][J]+1
            go_next(I,J-1)

x=[]
for i in range(h):
    x.append(list(input()))
#print(x)
c=0
for i in range(h):
    for j in range(w):
        if x[i][j]==".":
            c+=1
dp=[[10000000000 for i in range(w)]for j in range(h)]
dp[0][0]=1
go_next(0,0)
if dp[h-1][w-1]==10000000000:
    print(-1)
else:
    print(c-dp[h-1][w-1])


### FIXED CODE ###

#一個だけRE、わからねえ
#解答見る
import sys
sys.setrecursionlimit(1005)
h,w=map(int,input().split())

def go_next(I,J,n):
    n+=1
    global dp,w,h
    if n>1000:
        return
    if 0<=I<h-1:
        if x[I+1][J]=="." and dp[I+1][J]>dp[I][J]+1:
            dp[I+1][J]=dp[I][J]+1
            go_next(I+1,J,n)
    if 0<I<=h-1:
        if x[I-1][J]=="." and dp[I-1][J]>dp[I][J]+1:
            dp[I-1][J]=dp[I][J]+1
            go_next(I-1,J,n)
    if 0<=J<w-1:
        if x[I][J+1]=="." and dp[I][J+1]>dp[I][J]+1:
            dp[I][J+1]=dp[I][J]+1
            go_next(I,J+1,n)
    if 0<J<=w-1:
        if x[I][J-1]=="." and dp[I][J-1]>dp[I][J]+1:
            dp[I][J-1]=dp[I][J]+1
            go_next(I,J-1,n)

x=[]
for i in range(h):
    x.append(list(input()))
#print(x)
c=0
for i in range(h):
    for j in range(w):
        if x[i][j]==".":
            c+=1
dp=[[10000000000 for i in range(w)]for j in range(h)]
dp[0][0]=1
go_next(0,0,0)
if dp[h-1][w-1]==10000000000:
    print(-1)
else:
    print(c-dp[h-1][w-1])