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

import math

def permutations_count(n, r):
    return math.factorial(n) // math.factorial(n - r)

def check():
    a = []
    b = []
    count = 0
    bDict = {}
    N, K = [int(i) for i in input().split(' ')]
    for i in range(1,N+1):
        if (2*i)%K == 0:
            a.append(i)
    #print(a)
    for i in a:
        for j in range(1,N+1):
            if (i + j)%K == 0 and i != j:
                b.append((i,j))
                if str(i) not in bDict:
                    bDict[str(i)] = 1
                else:
                    bDict[str(i)] += 1
    
    for i in bDict:
        if bDict[i] > 1:
            count += permutations_count(bDict[i]+1, 3)//(bDict[i]+1)

    #print(b)
    print(3*len(b)+len(a)+count)
check()

### FIXED CODE ###

N, K = map(int, input().split())
cnt1,cnt2 = 0,0

for i in range(1,N+1):
    if i%K == 0:
        cnt1 += 1
    elif i%K == K/2:
        cnt2 += 1
print(cnt1**3+cnt2**3)
### BUGGY CODE ###

import math

sets = dict()

def gcd3(a, b, c):
    key = tuple(set((a, b, c)))
    if key in sets.keys():
        # print("cached")
        return sets[key]
    else:
        # print("stored")
        ans = math.gcd(math.gcd(a, b), c)
        sets[key] = ans
        return ans

#     print(key)
    
# gcd3(1, 1, 2)
# gcd3(1, 1, 2)

n = int(input())

ans = 0
for i in range(1, n+1):
    for j in range(1, n+1):
        for k in range(1, n+1):
            ans += gcd3(i, j, k)

print(ans)


### FIXED CODE ###

import math

sets = dict()

def gcd2(a, b):
    if a > b:
        key = (b, a)
    else:
        key = (a, b)
    
    try:
        # print("cached")
        return sets[key]
    except:
        # print("stored")
        ans = math.gcd(a, b)
        sets[key] = ans
        return ans

n = int(input())

ans = 0
for i in range(1, n+1):
    for j in range(1, n+1):
        pre = gcd2(i, j)

        for k in range(1, n+1):
            ans += gcd2(pre, k)

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

N, A, B, C = [int(a) for a in input().split(" ")]
ls = [int(input()) for i in range(N)]
tab = [([float("inf")]*N, ref) for ref in (A, B, C)]
INF = float("inf")
from heapq import heappush, heappop, heapreplace

def solve(ls):
    n = len(ls)
    ans = float("inf")
    qs = [[] for i in range(3)]
    for ref, q in zip((A, B, C), qs):
        for i in range(n):
            val = -abs(ref-ls[i])
            if len(q)<3:
                heappush(q, (val, i))
            elif q[0][0] < val:
                heapreplace(q, (val, i))
    ans = INF
    for a, i in qs[0]:
        for b, j in qs[1]:
            for c, k in qs[2]:
                if i!=j and j!=k and k!=i:
                    ans = min(ans, -(a+b+c))
    return ans

def dfs(ls):
    n = len(ls)
    if n < 3:
        return INF
    ans = solve(ls)
    for i in range(n-1):
        for j in range(i+1,n):
            ls2 = ls[:i]+ls[i+1:]
            ls2[j-1] = ls[i]+ls[j]
            ans = min(ans, 10+dfs(ls2))
    return ans

print(dfs(ls))


### FIXED CODE ###

N, A, B, C = [int(a) for a in input().split(" ")]
ls = [int(input()) for i in range(N)]
tab = [([float("inf")]*N, ref) for ref in (A, B, C)]
INF = float("inf")
from heapq import heappush, heappop, heapreplace
maxtarg = max(A, B, C)

# O(n)
def solve(ls):
    n = len(ls)
    qs = [[(-INF, -1)]*3 for i in range(3)]
    # 3*n times
    for ref, q in zip((A, B, C), qs):
        for i in range(n):
            val = -abs(ref-ls[i])
            if q[0][0] < val:
                heapreplace(q, (val, i))
    ans = INF
    # 9 times
    for a, i in qs[0]:
        for b, j in qs[1]:
            for c, k in qs[2]:
                if i!=j and j!=k and k!=i:
                    ans = min(ans, -(a+b+c))
    return ans
dic = {}
def dfs(ls):
    key = tuple(sorted(ls))
    if key in dic:
        return dic[key]
    n = len(ls)
    if n < 3: return INF
    ans = solve(ls)
    for i in range(n-1):
        for j in range(i+1,n):
            tmp = ls[i]+ls[j]
            if min(maxtarg-ls[i], maxtarg-ls[j]) < 10:
                continue
            ls2 = ls[:i]+ls[i+1:]
            ls2[j-1] = tmp
            ans = min(ans, 10+dfs(ls2))
    dic[key] = ans
    return ans

print(dfs(ls))
### BUGGY CODE ###

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

from collections import defaultdict

cnt = defaultdict(int)

for i in range(N):
    for j in range(61):
        if a_list[i] & (1 << j):
            cnt[j] += 1


ans = 0
mod = 10 ** 9 + 7

for i in range(61):
    ans += cnt[i] * (N - cnt[i]) * (1 << i)
    ans %= mod
print(ans)


### FIXED CODE ###

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

from collections import defaultdict

cnt = defaultdict(int)

for i in range(N):
    for j in range(61):
        if a_list[i] & (1 << j):
            cnt[j] += 1


ans = 0
mod = 10 ** 9 + 7

for i in range(61):
    ans += cnt[i] * (N - cnt[i]) * (1 << i)
    ans %= mod
print(ans)
### BUGGY CODE ###

n = int(input())
A = list(map(int, input().split()))
ans = 0
for i in range(len(A)):
    A[i] %= (10**9 +7)
for i in range(n):
    for j in range(i+1, n):
        ans += A[i]*A[j]
ans %= (10**9 + 7)
print(ans)

### FIXED CODE ###

n = int(input())
A = list(map(int, input().split()))
ans = 0
for i in range(n):
    A[i] %= (10**9 +7)
s = sum(A)
for i in range(n-1):
    s -= A[i]
    ans += A[i]*s
print(ans%(10**9 + 7))
### BUGGY CODE ###

n = int(input())
a = list(map(int, input().split()))
s = [0]
s.extend([sum(a[0:i+1]) for i in range(n)])
s.sort()
result = 0

count = 1
for i in range(n):
    if s[i] == s[i+1]:
        count += 1
    else:
        result += count * (count - 1) // 2
        count = 1
result += count * (count - 1) // 2

print(result)

### FIXED CODE ###

n = int(input())
a = list(map(int, input().split()))
s = [0]
for i in range(n):
    s.append(s[-1] + a[i])
s.sort()
result = 0

count = 1
for i in range(n):
    if s[i] == s[i+1]:
        count += 1
    else:
        result += count * (count - 1) // 2
        count = 1
result += count * (count - 1) // 2

print(result)
### BUGGY CODE ###

H,N = map(int,input().split())
MAXH = H+10000
DP = [float("inf")]*MAXH
DP[0] = 0
a = [0]*N
b = [0]*N
for i in range(N):
  a[i],b[i] = map(int,input().split())
for i in range(MAXH):
  if DP[i] == float("inf"):
    continue    
  for j in range(N):
        DP[min(i+a[j],H)] = min(DP[min(i+a[j],H)],DP[i]+b[j])
print(DP[H])

### FIXED CODE ###

H,N = map(int,input().split())
MAXH = H+1
DP = [float("inf")]*MAXH
DP[0] = 0
a = [0]*N
b = [0]*N
for i in range(N):
  a[i],b[i] = map(int,input().split())
for i in range(MAXH):
  if DP[i] == float("inf"):
    continue    
  for j in range(N):
        DP[min(i+a[j],H)] = min(DP[min(i+a[j],H)],DP[i]+b[j])
print(DP[H])
### BUGGY CODE ###

import collections
n=int(input())
s=input()
ans=0
d=collections.defaultdict(int)
for i in range(n):
  t=s[i]
  if d[t]==0:
    d[t]=i
  else:
    ans=max(ans,1)
  for j in range(i+1,n):
    t+=s[j]
    if d[t]==0:
      d[t]=j
    else:
      if d[t]<i:
        ans=max(ans,j-i+1)
print(ans)


### FIXED CODE ###

import collections
mod=10**9+7
base=257
n=int(input())
S=list(ord(s)-96 for s in input())
B=[0]*(n+1)
B[0]=1
for i in range(n):
  B[i+1]=(B[i]*base)%mod

def chk(x):
  ret=False
  h=0
  bx=B[x]
  d=collections.defaultdict(int)
  for i in range(x):
    h=(h*base+S[i])%mod
  d[h]=x
  for i in range(x,n):
    h=(h*base+S[i]-S[i-x]*bx)%mod
    if d[h]==0:
      d[h]=i+1
    elif d[h]<=i-x+1:
      ret=True
  return ret

l,r=0,n//2
while r-l>1:
  m=(l+r)//2
  if chk(m):
    l=m
  else:
    r=m
print(r if chk(r) else l)
### BUGGY CODE ###

n = int(input())
l = [int(i) for i in input().split()]
ans = 0
for i in range(n-2):
    for j in range(i+1, n-1):
        for k in range(j+1, n):
            if abs(l[j] - l[k]) < l[i] < l[j] + l[k]: ans += 1
print(ans)

### FIXED CODE ###

from bisect import bisect_left
n = int(input())
l = [int(i) for i in input().split()]
l.sort()
ans = 0
for i in range(n-2):
    for j in range(i+1, n-1):
        ans += bisect_left(l, l[i]+l[j]) - j - 1
print(ans)
### BUGGY CODE ###

X,Y,Z,K = map(int,input().split())
A = list(map(int,input().split()))
B = list(map(int,input().split()))
C = list(map(int,input().split()))
A.sort(reverse=True)
B.sort(reverse=True)
C.sort(reverse=True)
AB = []
for a in A:
    for b in B:
        AB.append(a+b)
AB.sort(reverse=True)
AB = AB[0:3000]

ABC = []
for ab in AB:
    for c in C:
        ABC.append(ab+c)
ABC.sort(reverse=True)

for i in range(K):
    print(ABC[i])

### FIXED CODE ###

# 通ってるコードをコピペ、ほぼ同じはずなんだけどこれは通る？
x,y,z,k = map(int,input().split())
lisa = list(map(int,input().split()))
lisb = list(map(int,input().split()))
lisc = list(map(int,input().split()))
lisa.sort(reverse=True)
lisb.sort(reverse=True)
lisc.sort(reverse=True)
an = []
ans = []
for num in lisb:
    for nu in lisa:
        an.append(num+nu)
an.sort(reverse=True)
an = an[:min(3001,x*y*z+1)]
for num in lisc:
    for nu in an:
        ans.append(num+nu)
ans.sort(reverse=True)
for i in range(k):
    print(ans[i])
### BUGGY CODE ###

n,k = map(int,input().split())
a = list(map(int,input().split()))
l = [1,a[0]]
tp = a[0]-1
for i in range(n):  
  if a[tp] not in l: 
    l.append(a[tp])
    tp = a[tp] -1
  else:
    l.append(a[tp])
    break
    
last = l[-1]

loop = len(l[l.index(last):-1])
first = len(l[:l.index(last)])
if len(l)>k:
  print(l[k])
  exit()
k -=first
k %=loop
if k==0:
  k+=loop
print(l[k+first])

### FIXED CODE ###

n, k = map(int, input().split())
a = list(map(int, input().split()))
l = [1]

for i in range(n):
  l.append(a[l[i]-1])
p = l.index(l[n])
#print(p,l[n])
if k<=n:
  print(l[k])
else:
  x = (k-n+1)%(n-p)
  if x ==0:
    x += (n-p)
    print(l[x-1])
  else:
    print(l[x+p-1])
### BUGGY CODE ###

n=int(input())
arr1=[]
arr2=[]
for _ in range(n):
  s=input()
  cnt1=0
  cnt2=0
  for i in range(len(s)):
    if s[i]=='(':
      cnt1+=1
    else:
      if cnt1==0:
        cnt2+=1
      else:
        cnt1-=1
  if cnt1-cnt2>=0:
    arr1.append([cnt1,cnt2])
  else:
    arr2.append([cnt1,cnt2])
arr1=sorted(arr1,key=lambda x:x[1])
arr2=sorted(arr2,reverse=True,key=lambda x:x[0])
arr=arr1+arr2
cnt=0
for a,b in arr:
  if b>cnt:
    print('No')
    break
  else:
    cnt+=a-b
else:
  if cnt==0:
    print('Yes')
  else:
    print('No')

### FIXED CODE ###

n=int(input())
arr1=[]
arr2=[]
for _ in range(n):
  s=input()
  cnt1=0
  cnt2=0
  for i in range(len(s)):
    if s[i]=='(':
      cnt1+=1
    else:
      if cnt1==0:
        cnt2+=1
      else:
        cnt1-=1
  if cnt1-cnt2>=0:
    arr1.append([cnt1,cnt2])
  else:
    arr2.append([cnt1,cnt2])
arr1=sorted(arr1,key=lambda x:x[1])
arr2=sorted(arr2,reverse=True,key=lambda x:x[0])
arr=arr1+arr2
cnt=0
for a,b in arr:
  if b>cnt:
    print('No')
    break
  else:
    cnt+=a-b
else:
  if cnt==0:
    print('Yes')
  else:
    print('No')
### BUGGY CODE ###

N = int(input())
A = list(map(int, input().split()))
Q = int(input())
B = [0]*Q
C = [0]*Q

sum = sum(A)

for i in range(Q):
    B[i], C[i] = map(int, input().split())
    
    time = 0
    A = sorted(A)
    for k in range(N):
        if A[k] == B[i]:
            A[k] = C[i]
            time += 1
        elif A[k] > B[i]:
            break
        
    sum += (C[i]-B[i])*time

    print(sum)

### FIXED CODE ###

N = int(input())
A = list(map(int, input().split()))
Q = int(input())
B = [0]*Q
C = [0]*Q

num = [0]*100000

for i in range(N):
    num[A[i]-1] += 1

sum = sum(A)

for i in range(Q):
    B[i], C[i] = map(int, input().split())
    
    sum += (C[i]-B[i])*num[B[i]-1]
    num[C[i]-1] += num[B[i]-1] 
    num[B[i]-1] = 0

    print(sum)
### BUGGY CODE ###

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

gates = []
for _ in range(m):
    gates.append(tuple(map(int, input().split())))

passed = set(range(gates[0][0], gates[0][1]+1))
for gate in gates[1:]:
    passed &= set(range(gate[0], gate[1]+1))
print(len(passed))


### FIXED CODE ###

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

gates = []
start, end = 1, n
for _ in range(m):
    L, R = map(int, input().split())
    if L > start:
        start = L
    if R < end:
        end = R

print(len(range(start, end+1)))
### BUGGY CODE ###

S = input()
length = len(S)
count = 0
ans = 0

for i in range(length):
    res = 0
    for j in range(i, length):
        res = (res * 10 + int(S[j])) % 2019
        if res == 0:
            count += 1
            
print(count)

### FIXED CODE ###

S = input()
mod = [0 for _ in range(len(S))]
mod[0] = int(S[-1])
for i in range(1, len(S)):
    mod[i] = (mod[i - 1] + pow(10, i, 2019) * int(S[-1 - i])) % 2019
ans = 0
res = [0 for _ in range(2019)]
for i in range(len(S)):
    ans += res[mod[i]]
    res[mod[i]] += 1
print(ans + res[0])
### BUGGY CODE ###

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

mod = 10 ** 9 + 7
f = [1]
for i in range(1,N+1):
    f.append((f[-1] * i) % mod)
def comb(n,r):
    return f[n] * (pow(f[r], mod-2, mod) * pow(f[n-r], mod-2, mod) % mod) % mod

ans = 0
l = [0] + [(((comb(N-1,2+i) * f[N-(3+i)]) % mod) * f[i]) % mod for i in range(N-2)] + [f[N-2]]


for i in range(N-1):
    for j in range(i+1,N):
        ans += (l[j-i] * (x[j] - x[i])) % mod
        ans %= mod
        if j == N - 1:
            l[j-i-1] = l[j-i-1] + l[j-i]

print(ans)

### FIXED CODE ###

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

mod = 10 ** 9 + 7

c = [1]
for i in range(1,N-1):
    c.append(c[i-1]+pow(i+1,mod-2,mod))

ans = 0
for i in range(N-1):
    ans += (c[i] * (x[i+1] - x[i])) % mod
    ans %= mod
    
for i in range(1,N):
    ans *= i
    ans %= mod

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

N = int(input())

s = int(N*(N+1)/2)
for k in range(2,N+1):
    i = 1
    while k*i <= N:
        s += k*i
        i += 1

print(s)

### FIXED CODE ###

N = int(input())

s = int(N*(N+1)/2)
for k in range(2,N+1):
    i = 1
    while k*i <= N:
        s += k*i
        i += 1

print(s)
### BUGGY CODE ###

import sys
input = sys.stdin.readline

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

dp = [[[0 for k in range(N + 1)]for j in range(N + 1)]for i in range(N + 1)]


one = A.count(1)
two = A.count(2)
three = A.count(3)

for k in range(three + 1):
    for j in range(two + three + 1 - k):
        for i in range(one + two + three + 1 -k -j):
            if i == 0 and j == 0 and k == 0:
                continue
            ret = 0
            if i > 0:
                ret += dp[i - 1][j][k] * i
            if j > 0:
                ret += dp[i + 1][j - 1][k] * j 
            if k > 0:
                ret += dp[i][j + 1][k -1] * k

            ret += N
            ret *= 1.0 / (i + j + k)
            dp[i][j][k] = ret

print(dp[one][two][three])



### FIXED CODE ###

import sys
input = sys.stdin.readline

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

    dp = [[[0.0 for k in range(N + 1)]for j in range(N + 1)]for i in range(N + 1)]


    one = A.count(1)
    two = A.count(2)
    three = A.count(3)

    for k in range(three + 1):
        for j in range(two + three + 1 - k):
            for i in range(one + two + three + 1 -k -j):
                if i == 0 and j == 0 and k == 0:
                    continue
                ret = N * 1.0
                if i > 0:
                    ret += dp[i - 1][j][k] * i
                if j > 0:
                    ret += dp[i + 1][j - 1][k] * j 
                if k > 0:
                    ret += dp[i][j + 1][k -1] * k

                dp[i][j][k] = ret / (i + j + k)

    print(dp[one][two][three])

main()
### BUGGY CODE ###

N,T = map(int, input().split())
AB = [[int(i) for i in input().split()] for _ in range(N)]

AB.sort()

# dp[i][j]: 満足度の最大値
# i: i品目まで
# j: 制限時間(< T)
dp = [[0] * 3100 for _ in range(3100)]

dp[0][0] = 0

# 貰うDP
ans = 0
for i in range(1, N + 1):
    for j in range(T):
        dp[i][j] = dp[i - 1][j]
        
        # ラストオーダーはAB[i - 1]
        ans = max(ans, dp[i][j] + AB[i - 1][1])

        if j - AB[i - 1][0] >= 0:
            dp[i][j] = max(dp[i][j], dp[i - 1][j - AB[i - 1][0]] + AB[i - 1][1])

print(ans)

### FIXED CODE ###

def main():
    N,T = map(int, input().split())
    AB = [[int(i) for i in input().split()] for _ in range(N)]

    AB.sort()

    # dp[i][j]: 満足度の最大値
    # i: i品目まで
    # j: 制限時間(< T)
    dp = [[0] * 3100 for _ in range(3100)]

    dp[0][0] = 0

    # 貰うDP
    ans = 0
    for i in range(1, N + 1):
        for j in range(T):
            dp[i][j] = dp[i - 1][j]
            
            # ラストオーダーはAB[i - 1]
            ans = max(ans, dp[i][j] + AB[i - 1][1])

            if j - AB[i - 1][0] >= 0:
                dp[i][j] = max(dp[i][j], dp[i - 1][j - AB[i - 1][0]] + AB[i - 1][1])

    print(ans)

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

import sys
sys.setrecursionlimit(10**6)
#input = sys.stdin.readline

N, Q = map(int, input().split())
G = [[] for _ in range(N)]
for _ in range(N-1):
    a, b = map(int, input().split())
    G[a-1].append(b-1)
    G[b-1].append(a-1)
P = [0] * N
for _ in range(Q):
    p, x = map(int, input().split())
    P[p-1] += x
ans = [-1] * N
#print(G)
#print(P)

def dfs(v, p):
    ans[v] = P[v] + p
    for vi in G[v]:
        if ans[vi] != -1:
            continue
        dfs(vi, ans[v])
dfs(0, 0)

print(' '.join(map(str, ans)))


### FIXED CODE ###

import sys

def main():
    sys.setrecursionlimit(10**6)
    input = sys.stdin.readline
    n, q = map(int, input().split())
    #n, q = map(int, "4 3".split())
    g = [[] for _ in range(n)]
    for i in range(n-1):
        a, b = map(int, input().split())
        #a, b = map(int, ["1 2", "2 3", "2 4"][i].split())
        g[a-1].append(b-1)
        g[b-1].append(a-1)


    add = [0] * n
    for i in range(q):
        p, v = map(int, input().split())
        #p, v = map(int, ["2 10", "1 100", "3 1"][i].split())
        #dfs(p-1, v)
        add[p-1] += v

    ans = [0] * n
    def dfs(v,p,value): #p: parent of v
        value += add[v]
        ans[v] = value
        for c in g[v]:
            if c == p: continue
            dfs(c,v,value)
    dfs(0, -1, 0)
    """
    def dfs(start, point):
        stack = [start]
        while stack:
            x = stack.pop()
            ans[x] += point
            stack += g[x]
    """

    print(' '.join(map(str, ans)))

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

import bisect

n=int(input())
a=[int(i) for i in input().split()]
a.sort()
b=[int(i) for i in input().split()]
b.sort()
c=[int(i) for i in input().split()]
c.sort()
#print(n,a,b,c)

ans=0
for j in range(n):
    aa=bisect.bisect_right(b, a[j])
    if aa < n:
        for i in range(aa,n):
            bb=bisect.bisect_right(c, b[i])
            ans+=n-bb

print(ans)


### FIXED CODE ###

import bisect

n=int(input())
a=[int(i) for i in input().split()]
a.sort()
b=[int(i) for i in input().split()]
c=[int(i) for i in input().split()]
c.sort()
#print(n,a,b,c)

ans=0
for j in range(n):
    aa=bisect.bisect_left(a, b[j])
    bb=bisect.bisect_right(c, b[j])
    ans+=aa*(n-bb)

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

def manipulate(x, k):
	return abs(x - k)
	

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

while n > k / 2:
	if k == 1:
		n = 0
		break
		
	n = manipulate(n, k)
	
	
print(n)

### FIXED CODE ###

def manipulate(x, k):
	return abs(x - k)

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

while n > k / 2:	
	n = manipulate(n, k)
	
print(n)
### BUGGY CODE ###

S = input()

candidate = ["dream", "dreamer", "erase", "eraser", "dreameraser"]

i = 0
while i <= len(S) - 1:
    if S[i] == "d":
        if i + 10 < len(S):
            if S[i + 10]  == "r":
                if not S[i:i+11] in candidate:
                    print("NO")
                    exit()
                else:
                    i += 11
        elif i + 6 < len(S):
            if S[i+6] == "r":
                if not S[i:i+7] in candidate:
                    print("NO")
                    exit()
                else:
                    i += 7
            elif not S[i:i+6] in candidate:
                print("NO")
                exit()
            else:
                i += 6
        elif not S[i:i+6] in candidate:
                print("NO")
                exit()
        else:
            i += 6
    elif S[i] == "e":
        if i + 5 < len(S):
            if S[i+5] == "r":
                if not S[i:i+6] in candidate:
                    print("NO")
                    exit()
                else:
                    i += 6
            elif not S[i:i+5] in candidate:
                print("NO")
                exit()
            else:
                i += 5
        elif not S[i:i+5] in candidate:
                print("NO")
                exit()
        else:
            i += 5
    else:
        print("NO")
        exit()
print("YES")


### FIXED CODE ###

T = input()

S = T[::-1]
i = 0
while i <= len(S) - 1:
    if S[i] == "r":
        if S[i:i+7] == "remaerd":
            i += 7
        elif S[i:i+6] == "resare":
            i += 6
        else:
            print("NO")
            exit()
    elif S[i] == "m":
        if S[i:i+5] == "maerd":
            i += 5
        else:
            print("NO")
            exit()
    elif S[i] == "e":
        if S[i:i+5] == "esare":
            i += 5
        else:
            print("NO")
            exit()
    else:
        print("NO")
        exit()
print("YES")
### BUGGY CODE ###

mod = 10**9+7
n, m = map(int, input().split())
stairs = [0]*(n+1)
broken = []
stairs[0] = 1

for i in range(m):
    b = int(input())
    if broken and b-1 == broken[-1]:
        print(0)
        exit(0)
    broken.append(b)

for i in range(n+1):
    if i in broken:
        continue
    if i >= 2:
        stairs[i] = stairs[i-1] + stairs[i-2]
    elif i == 1:
        stairs[i] = stairs[i-1]

print(stairs[-1]%mod)




### FIXED CODE ###

mod = 10**9+7
n, m = map(int, input().split())
stairs = [0]*(n+1)
broken = []
stairs[0] = 1

def binSearch(broken, e):
    l, r = 0, m-1

    while l <= r:
        mid = (l+r)//2

        if broken[mid] > e:
            r = mid - 1
        elif broken[mid] < e:
            l = mid + 1
        else:
            return True
    return False


for i in range(m):
    b = int(input())
    if broken and b-1 == broken[-1]:
        print(0)
        exit(0)
    broken.append(b)

for i in range(n+1):
    if binSearch(broken, i):
        continue
    if i >= 2:
        stairs[i] = stairs[i-1] + stairs[i-2]
    elif i == 1:
        stairs[i] = stairs[i-1]

print(stairs[-1]%mod)
### BUGGY CODE ###

S = list(input())
# RLを基本的には行き来することになる
# RRLの時 
# 0   1   2   3   4
# 100 010 001 010 001
cnts = [0]*len(S)
for idx in range(len(S)):
    c = 0
    if S[idx] == 'R':
        while True:
            c += 1
            idx += 1
            if S[idx] == 'L':
                break
        if c % 2 == 0:
            cnts[idx] += 1
        else:
            cnts[idx-1] += 1
    else:
        while True:
            c += 1
            idx -= 1
            if S[idx] == 'R':
                break
        if c % 2 == 0:
            cnts[idx] += 1
        else:
            cnts[idx+1] += 1

print(' '.join([str(x) for x in cnts]))
        

### FIXED CODE ###

import numpy as np
S = list(input())
cnts = [0]*len(S)

c = 0
for idx in range(len(S)):
    if S[idx] == 'R':
        c += 1
    else:
        cnts[idx] += np.floor(c / 2)
        cnts[idx-1] += np.ceil(c / 2)
        c = 0

c = 0
for i in range(len(S)):
    idx = len(S)-i-1
    if S[idx] == 'L':
        c += 1
    else:
        cnts[idx] += np.floor(c / 2)
        cnts[idx+1] += np.ceil(c / 2)
        c = 0
        
print(' '.join([str(int(x)) for x in cnts]))