Harryxun/stf_run huggingface dataset:
T = input()
S = ''
p,q,r,s = 'maerd','esare','remaerd','resare'
for i in range(len(T)):
    S += T[len(T)-i]
while len(S) >= 7:
    x = S[:5]
    y = S[:6]
    z = S[:7]
    if x == p or x == q:
        if len(S) > 5:
            S = S[5:]
        else:
            S = ''
    elif y == s:
        if len(S) > 6:
            S = S[6:]
        else:
            S = ''
    elif z == r:
        if len(S) > 7:
            S = S[7:]
        else:
            S = ''
    else:
        break
ans = 'NO'
if len(S) == 0:
    ans = 'YES'
print(ans)

### FIXED CODE ###

T = input()
S = ''
p,q,r,s = 'maerd','esare','remaerd','resare'
for i in range(len(T)):
    S += T[len(T)-i-1]
while len(S) >= 5:
    x = S[:5]
    y = S[:6]
    z = S[:7]
    if x == p or x == q:
        if len(S) > 5:
            S = S[5:]
        else:
            S = ''
    elif y == s:
        if len(S) > 6:
            S = S[6:]
        else:
            S = ''
    elif z == r:
        if len(S) > 7:
            S = S[7:]
        else:
            S = ''
    else:
        break
ans = 'NO'
if len(S) == 0:
    ans = 'YES'
print(ans)
import math
def solve():
    a,b,c = map(int, input().split())
    if (4 * a * b < (c-a-b)**2 and c-a-b>=0) \
        or (4 * a * b > (c-a-b) ** 2 and c-a-b<0):
        print('Yes')
    else:
        print('No')
    
if __name__ == '__main__':
    solve()

### FIXED CODE ###

def solve():
    mod = 10 ** 9 + 7
    fac, finv, inv = COMinit(10 ** 6, mod)

    X, Y = map(int, input().split())
    if (X + Y) % 3 != 0:
        print(0)
        return
    
    ans = 0
    for one_cnt in range(10 ** 6):
        x1 = one_cnt * 2
        y1 = one_cnt * 1
        remain_x = X - x1
        remain_y = Y - y1
        if remain_x * 2 != remain_y or remain_x < 0 or remain_y < 0:
            continue
        two_cnt = remain_x
        ans += COM(one_cnt+two_cnt, one_cnt,mod,fac,finv,inv)
    
    print(ans)

def n_combination(n, r, mod):
    numer_sum = 1
    denom_sum = 1
    for i in range(r):
        numer_sum *= n - i
        numer_sum % mod
        denom_sum *= r - i
        numer_sum % mod
    
    return numer_sum * modinv(denom_sum, mod) % mod

def modinv(a, mod):
    return pow(a, mod-2, mod)
    
def COMinit(N, mod):
    fac = [0] * N
    finv = [0] * N
    inv = [0] * N

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

    for i in range(2, N):
        fac[i] = fac[i-1] * i % mod
        inv[i] = mod - inv[mod%i] * (mod // i) % mod
        finv[i] = finv[i-1] * inv[i] % mod
    
    return fac, finv, inv

def COM(n, r, mod, fac, finv, inv):
    if n < r:
        return 0
    if n < 0 or r < 0:
        return 0
    return fac[n] * (finv[r] * finv[n-r] % mod) % mod

if __name__ == '__main__':
    solve()
n,m,x = map(int,input().split())
a = list(map(int,input().split()))

a.append(x).sort()

if len(a[:a.index(x)]) >= len(a[-(a.index(x)+1):]):
  print(len(a[-(a.index(x)+1):]))
else:
  print(len(a[:a.index(x)]))

### FIXED CODE ###

n,m,x = map(int,input().split())
a = list(map(int,input().split()))
c = 0
d = m

for i in range(m):
  if a[i] < x:
    c += 1
    d -= 1

if c >= d:
  print(d)
else:
  print(c)
NM = input().split(" ")
N = int(NM[0])
M = int(NM[1])

Xin= input().split(" ")


Xls = []
tousa = []
for i in range(0,M):
    Xls.append(int(Xin[i]))

Xls.sort()

if M != 1:
    for i in range(0,M-1):
        tousa.append(abs(Xls[i+1] - Xls[i]))

if M == 1:
    print(0)
    exit()

tousa.sort()
for i in range(0,N-1):
    tousa.pop()

ret = 0

for i in tousa:
    ret = i + ret

print(ret)


### FIXED CODE ###

NM = input().split(" ")
N = int(NM[0])
M = int(NM[1])

Xin= input().split(" ")


Xls = []
tousa = []
for i in range(0,M):
    Xls.append(int(Xin[i]))

Xls.sort()

if M != 1:
    for i in range(0,M-1):
        tousa.append(abs(Xls[i+1] - Xls[i]))




tousa.sort()


if N<M:
    for i in range(0,N-1):
        tousa.pop()
else:
    print(0)
    exit()
ret = 0

for i in tousa:
    ret = i + ret

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

B = [0] * N

for i in A:
  B[i-1] = int(B[i-1]) + 1
  
for j in B:
  print(j)

### FIXED CODE ###

R = int(input())

l = 2 * R * 3.141592

print(l)
X = int(input('input the place in coding contest: '))
Y = int(input('input the place in robot maneuver: '))

totalAmount = 0
first = 300000
second = 200000
third = 100000
extraPrice = 400000
rejected = 0

if X == 1:
    if Y == 1:
        totalAmount = first + first + extraPrice
    elif Y == 2:
        totalAmount = first + second
    elif Y == 3:
        totalAmount = first + third
    elif Y < 1 or Y > 3:
        totalAmount = first
elif X == 2:
    if Y == 1:
        totalAmount = second + first
    elif Y == 2:
        totalAmount = second + second
    elif Y == 3:
        totalAmount = second + third
    elif Y < 1 or Y > 3:
        totalAmount = second
elif X == 3:
    if Y == 1:
        totalAmount = third + first
    elif Y == 2:
        totalAmount = third + second
    elif Y == 3:
        totalAmount = third + third
    elif Y < 1 or Y > 3:
        totalAmount = third
elif X < 1 or X > 3:
    if Y == 1:
        totalAmount = first
    elif Y == 2:
        totalAmount = second
    elif Y == 3:
        totalAmount = third
    elif Y < 1 or Y > 3:
        totalAmount = rejected
print(totalAmount)

### FIXED CODE ###

X, Y = map(int, input().split())

totalAmount = 0
first = 300000
second = 200000
third = 100000
extraPrice = 400000


if X == 1:
    totalAmount = first
    pass
elif X == 2:
    totalAmount = second
    pass
elif X == 3:
    totalAmount = third
    pass
elif X < 1 or X > 3:
    totalAmount = 0
    pass

if Y == 1:
    totalAmount = totalAmount + first
    pass
elif Y == 2:
    totalAmount = totalAmount + second
    pass
elif Y == 3:
    totalAmount = totalAmount + third
    pass
elif Y < 1 or Y > 3:
    totalAmount = totalAmount + 0
    pass

if X == 1 and Y == 1:
    totalAmount = totalAmount + extraPrice

print(totalAmount)
S,T=input().split()
A,B=map(int,input().split())
U=input()
if U=S:
  print(A-1,B)
else
  print(A,B-1)

### FIXED CODE ###

S,T=input().split()
A,B=map(int,input().split())
U=input()
if U==S:
  print(A-1,B)
else:
  print(A,B-1)
N = int(input())
H = list(map(int, input().split()))

prev = H[0]
for i in range(1,N):
  if prev < H[i]:
    H[i] -= 1
    prev = H[i]
    continue
  if prev == H[i]
    continue
  print('No')
  return
print('Yes')


### FIXED CODE ###

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

prev = H[0]
r = True
for i in range(1,N):
  if prev < H[i]:
    H[i] -= 1
    prev = H[i]
    continue
  if prev == H[i]:
    continue
  r = False
  break

if r:
  print('Yes')
else:
  print('No')
N = int(input())
for i in range(7):
    if 2**i < N:
        ans = 2**i
print(ans)

### FIXED CODE ###

N = int(input())
n = 1
num = 2
while num <= N:
    num = 2**n
    n += 1
print(int(num/2))
A, V = map(int, input().split())
B, W = map(int, input().split())
T = int(input())

if A <= B:
    print("NO")
    exit()



diff = max(A, B) - min(A, B)

speed = V - W

if diff / speed <= T:
    print("YES")
else:
    print("NO")

### FIXED CODE ###

A, V = map(int, input().split())
B, W = map(int, input().split())
T = int(input())

if V <= W:
    print("NO")
    exit()



diff = max(A, B) - min(A, B)

speed = V - W

if diff / speed <= T:
    print("YES")
else:
    print("NO")
n = list(map(int,input().split()))
strlist=[input() for i in range(n[1])]
for i in range(10**(n[0]-1),10**n[0]):
    for j in range(n[1]):
        if len(str(i))<int(strlist[j][0]) or str(i)[int(strlist[j][0])-1]!=strlist[j][2]:
            z=1
            break
    if z==1:
        continue
    elif j+1==n[1]:
        print(i)
        break
    else:
        continue
if i==10**n[0]-1:
    print('-1')

### FIXED CODE ###

n,m=map(int,input().split())
l=[-1]*n
check=False

for i in range(m):
    s,c=map(int,input().split())
    if n!=1 and s==1 and c==0:
        break
    if l[s-1]==-1 or l[s-1]==c:
        l[s-1]=c
    else:
        break
    if i==m-1:
        check=True
if n!=1 and l[0]==-1:
    l[0]=1

if m!=0 and check:
    for num in l:
        if num==-1:
            print(0,end='')
        else:
            print(num,end='')
elif n==1 and m==0:
    print(0)
elif m==0:
    print(10**(n-1))
else:
    print('-1')
lst=[]
for i in 5:
	lst.append(int(input()))
k = int(input())
sor = sorted(lst)
if sor[4] - sor[0] > k:
	print(":(")
else:
	print("Yay!")


### FIXED CODE ###

lst=[]
for i in range(5):
	lst.append(int(input()))
k = int(input())
sor = sorted(lst)
if sor[4] - sor[0] > k:
	print(":(")
else:
	print("Yay!")
import math
print(math.ceil(sum([int(x for x in input().split())])/2))

### FIXED CODE ###

import math
print(math.ceil(sum([int(x) for x in input().split()])/2))
a,b,c=[map(int,input().split())]
print("Yes" if a>=c or b>=c or a+b>=c else "No")

### FIXED CODE ###

a,b,c=map(int,input().split())
print("Yes" if a>=c or b>=c or a+b>=c else "No")
a, b = map(int, input().split(","))
if a > 2*b :
    print(a-2*b)
print(0)

### FIXED CODE ###

a, b = map(int, input().split(" "))
if a > 2*b :
    print(a-2*b)
else:
    print(0)
n=int(input())
c=list(map(int, input().split()))
k = 1
count = 0
while True:
  for i in range(n):
    k *= c[n]
  l = (k % (2**n))
  if (l == 0):
    for j in range(n):
      count += 1
      c[j] = c[j] / 2
  else:
    break
print(count)
  

### FIXED CODE ###

n = int(input())
c = list(map(int, input().split()))
k = 1
count = 0
while True:
  q = 0
  for i in range(n):
    if (c[i]%2 ==1):
      q += 1
  if (q > 0):
    break
  else:
    for j in range(n):
      c[j] = c[j] / 2
    count += 1
print(count)
x, y =  map(int, raw_input().split())
z = 0
i = 1
a = 0

while z < 10 ** 18 or a ==  0:
    z = x * i
    i = i + 1
    if z mod y != 0:
        a = 1
print (z)


### FIXED CODE ###

x, y =  map(int, input().split())
i = 1
if x % y == 0:
    print(-1)
else:
    for i in range(10 ** 18 + 1):
        if (i * x) % y != 0:
            print(i * x)
            break
        else:
            continue
import numpy as np
N = int(input())

A_ls = np.array(list(map(int,input().split(" "))))
B_ls = np.array(list(map(int,input().split(" "))))

S = 0

for i,b in B_ls:
    if b > A_ls[i]:
        A_ls[i] == 0
        b -= A_ls[i]
        S += A_ls[i]
        if A_ls[i+1] >= b:
            A_ls[i+1] -=b
            S+=b
        else:
            A_ls[i+1] = 0
            S+=(A_ls[i+1])
    else:
        S += b

print(S)


### FIXED CODE ###


import numpy as np
N = int(input())

A_ls = np.array(list(map(int,input().split(" "))))
B_ls = np.array(list(map(int,input().split(" "))))

S = 0

for i,b in enumerate(B_ls):
    if b > A_ls[i]:
        b -= A_ls[i]
        S += A_ls[i]
        if A_ls[i+1] >= b:
            A_ls[i+1] -=b
            S+=b
        else:
            S+=A_ls[i+1]
            A_ls[i+1] = 0 
    else:
        S += b

print(S)
import math
h = int(input())
ans = 0
num = 0
for i in range(41,0,-1):
    if 2**i <= h:
        num = 2**i
        rep = i
        # print(i)
        break
for i in range(rep+1):
    ans += 2**i
# print(num)
print(ans)



### FIXED CODE ###

import math
import sys
h = int(input())
ans = 0
num = 0
if h == 1:
    print(1)
    sys.exit()
for i in range(41,0,-1):
    if 2**i <= h:
        num = 2**i
        rep = i
        # print(i)
        break
for i in range(rep+1):
    ans += 2**i
# print(num)
print(ans)
import heapq
N,W=map(int,raw_input().split())
wv=[]

w_sum=0
for i in range(N):
	w,v=map(int,raw_input().split())
	w_sum+=w
	wv.append((w,v))


a=[ float("-inf") for i in range(w_sum*2) ]

i=0
i=1
q=[]
for ind_i, i in enumerate(wv):
	w=i[0]
	v=i[1]
	#Initialize
	if ind_i==0:
		a[0]=0
		a[w]=v
		continue
	#Put queue
	for ind_j, j in enumerate(a):
		if j!=float("-inf"):
			heapq.heappush(q,(ind_j,j))
	
	while len(q)!=0:
		ind_j, j=heapq.heappop(q)
		a[ind_j+w]=max(a[ind_j+w], a[ind_j]+v)
		
print max(a[:W+1])




### FIXED CODE ###

from collections import defaultdict
N,W=map(int,raw_input().split())

a=defaultdict(lambda:[])
for i in range(N):
	w,v=map(int,raw_input().split())
	a[w]=a[w]+[v]

for i,j in a.items():
	a[i]=sorted(j,reverse=True)



lst=[]
for i,j in a.items():
	lst.append( (i,len(j)) )

max_val=0
if len(lst)==1:
	w1=lst[0][0]
	c1=lst[0][1]
	for i in range(c1+1):
		if i*w1<=W:
			max_val=max(max_val, sum(a[w1][:i]))

elif len(lst)==2:
	w1=lst[0][0]; w2=lst[1][0]
	c1=lst[0][1]; c2=lst[1][1]
	for i in range(c1+1):
		for j in range(c2+1):
				if i*w1+j*w2<=W:
					max_val=max(max_val, sum(a[w1][:i])+sum(a[w2][:j]))

elif len(lst)==3:
	w1=lst[0][0]; w2=lst[1][0]; w3=lst[2][0]
	c1=lst[0][1]; c2=lst[1][1]; c3=lst[2][1]
	for i in range(c1+1):
		for j in range(c2+1):
			for k in range(c3+1):
				if i*w1+j*w2+k*w3<=W:
					max_val=max(max_val, sum(a[w1][:i])+sum(a[w2][:j])+sum(a[w3][:k]))

elif len(lst)==4:
	w1=lst[0][0]; w2=lst[1][0]; w3=lst[2][0]; w4=lst[3][0]
	c1=lst[0][1]; c2=lst[1][1]; c3=lst[2][1]; c4=lst[3][1]
	for i in range(c1+1):
		for j in range(c2+1):
			for k in range(c3+1):
				for m in range(c4+1):
					if i*w1+j*w2+k*w3+m*w4<=W:
						max_val=max(max_val, sum(a[w1][:i])+sum(a[w2][:j])+sum(a[w3][:k])+sum(a[w4][:m]))

print max_val
N = int(input())

def prime_factor(n):
    i = 2
    table = [1]
    while i * i <= n:
        while n % i == 0:
            n //= i
            table.append(i)
        i += 1
    if n > 1:
        table.append(n)
    return table

res = prime_factor(N)

tmp = 1
tmp2 = N
for i in range(len(res)):
    if len(str(tmp)) >= len(str(tmp2)):
        break
    count = tmp2
    tmp2 = tmp2//res[i]
    tmp *= res[i]
    
print(len(str(count)))

### FIXED CODE ###

N = int(input())

def prime_factor(n):
    i = 2
    table = []
    while i * i <= n:
        while n % i == 0:
            n //= i
            table.append(i)
        i += 1
    if n > 1:
        table.append(n)
    return table

res = prime_factor(N)

result = 10 ** 10
for i in range(1, N+1):
    if N%i == 0:
        result = min(result, max(len(str(i)), len(str(N//i))))
    if i*i > N:
        break


print(result)
# input data
n=int(input())
u=[]
v=[]
w=[]
for i in range(0,n-1):
	ui,vi,wi = map(int, input().split())
	u.append(ui)
	v.append(vi)
	w.append(wi%2)


# solve
ans=[]
for i in range(0,n+1):
	ans.append(-1)

_neighbors=[]
for i in range(0,n+1):
	_neighbors.append([])

for i in range(0,n-1):
	_neighbors[u[i]].append([v[i], w[i]])
	_neighbors[v[i]].append([u[i], w[i]])

# paint v with c=0,1 and its neighbors
def bfs(u,c):
	if ans[u] != -1:
		return

	ans[u] = c

	for vw in _neighbors[u]:
		if vw[1] == 0:
			bfs(vw[0],c)
		else:
			bfs(vw[0],1-c)

bfs(1,0)

print(ans)



### FIXED CODE ###

import sys

sys.setrecursionlimit(100000)

# input data
n=int(input())
u=[]
v=[]
w=[]
for i in range(0,n-1):
	ui,vi,wi = map(int, input().split())
	u.append(ui)
	v.append(vi)
	w.append(wi%2)


# solve
ans=[]
for i in range(0,n+1):
	ans.append(-1)

_neighbors=[]
for i in range(0,n+1):
	_neighbors.append([])

for i in range(0,n-1):
	_neighbors[u[i]].append([v[i], w[i]])
	_neighbors[v[i]].append([u[i], w[i]])

# paint v with c=0,1 and its neighbors
def bfs(u,c):
	if ans[u] != -1:
		return

	ans[u] = c

	for vw in _neighbors[u]:
		if vw[1] == 0:
			bfs(vw[0],c)
		else:
			bfs(vw[0],1-c)

bfs(1,0)

for i in range(1,n+1):
	print(ans[i])
from itertools import combinations
while True:
    n, x = map(int, input().split())
    if n == x == 0:
        break
    print(len(1 for a, b, c in combinations(range(1, n + 1), 3) if a + b + c == x))



### FIXED CODE ###

from itertools import combinations
while True:
    n, x = map(int, input().split())
    if n == x == 0:
        break
    print(len([1 for a, b, c in combinations(range(1, n + 1), 3) if a + b + c == x]))
N = int(input())
S = input()

RN = S.count('R')
GN = S.sount('G')
BN = S.count('B')

ans = RN * GN * BN

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

print(ans)

### FIXED CODE ###

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

RN = S.count('R')
GN = S.count('G')
BN = S.count('B')

ans = RN * GN * BN

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

print(ans)
a,b,c=int(input().split());print(min(a*b,c))

### FIXED CODE ###

(a,b,c)=map(int,input().split());print(min(a*b,c))
import sys
input = sys.stdin.readline

ina = input()
if ina == "1":
  print("Hello World")
else:
  inb = int(input())
  inc = int(input())
  print(inb + inc)
  

### FIXED CODE ###

ina = input()
if ina == "1":
  print("Hello World")
else:
  inb = int(input())
  inc = int(input())
  print(inb + inc)
import numpy as np


def main():
    H, W = [int(x) for x in input().split()]
    board = [[0 for i in range(H)] for j in range(W)]

    """ #は1, .は0 """
    for i in range(H):
        X = input()
        for j in range(len(X)):
            if X[j] == "#":
                board[i][j] = 1

    num_board = np.array(board)
    height, width = num_board.shape[:2]
    count = 0
    while (np.sum(num_board) != height*width):
        num_board_ans = np.zeros((height, width))
        for i in range(height):
            for j in range(width):
                if num_board[i, j] == 1:
                    num_board_ans[i, j] = 1
                    a = max(i-1, 0)
                    num_board_ans[a, j] = 1
                    b = max(j-1, 0)
                    num_board_ans[i, b] = 1
                    c = min(i+1, height-1)
                    num_board_ans[c, j] = 1
                    d = min(j+1, width-1)
                    num_board_ans[i, d] = 1
        num_board = num_board_ans
        count += 1

    print(count)


if __name__ == "__main__":
    main()


### FIXED CODE ###

from collections import deque


def bfs(h, w, board, visited):
    queue = deque([])
    for i in range(h):
        for j in range(w):
            if board[i][j] == "#":
                queue.append([i, j])
                visited[i][j] = 0
    ans = 0
    while queue:
        y, x = queue.popleft()
        for i, j in ([1, 0], [0, 1], [-1, 0], [0, -1]):
            yn, xn = y+i, x+j
            if yn >= h or xn >= w or yn < 0 or xn < 0:
                continue
            if visited[yn][xn] == -1 and board[yn][xn] == ".":
                visited[yn][xn] = visited[y][x] + 1
                queue.append([yn, xn])
                ans = max(ans, visited[yn][xn])

    return ans


def main():
    h, w = map(int, input().split())
    board = [input() for _ in range(h)]
    visited = [[-1 for _ in range(w)] for _ in range(h)]
    print(bfs(h, w, board, visited))


if __name__ == "__main__":
    main()
from bisect import *
S = list(str(input()))
K = int(input())

alp = list("abcdefghijklmnopqrstuvwxyz")

for i in range(len(S)):
  b = bisect_left(alp,S[i])
  print(b,K,S)
  if i == len(S)-1:
    S[i] = alp[(b+K)%26]
  elif 26 - b <= K:
    K -= (26 - b)
    S[i] = "a"
  if K == 0:
    break
  
print("".join(S))

### FIXED CODE ###

from bisect import *
S = list(str(input()))
K = int(input())

alp = list("abcdefghijklmnopqrstuvwxyz")

for i in range(len(S)):
  b = bisect_left(alp,S[i])

  if i == len(S)-1:
    S[i] = alp[(b+K)%26]
  elif b == 0:
    continue
  elif 26 - b <= K:
    K -= (26 - b)
    S[i] = "a"
  if K == 0:
    break
  
print("".join(S))
import math
N = input()
for val in range(1,N+1):
	x = map(float,raw_input().split(' '))
	d = math.sqrt((x[0]-x[3])**2 - (x[1]-x[4])**2)
	s = x[2]+x[5]
	r = math.fabs(x[2]-x[5])
	if r >= d:
		if x[2] > x[5]:
			print '2'
		else:
			print '-2'
		elif s < d:
			print '0'
		else:
			print '1'

### FIXED CODE ###

import math
N = input()
answers = []
for val in range(1,N+1):
	x = map(float,raw_input().split(' '))
	d = (x[0]-x[3])**2 + (x[1]-x[4])**2
	d = math.sqrt(d)
	d = math.fabs(d)
	s = x[2]+x[5]
	r = math.fabs(x[2]-x[5])
	if d > s:
		answers.append(0)
	elif d == s:
		answers.append(1)
	elif d < s:
		if d < r:
			if x[2] > x[5]:
				answers.append(2)
			else:
				answers.append(-2)
		elif d >= r:
			answers.append(1)
for val in answers:
	print val
import collections
n=int(input())
A = list(map(int, input().split
c=collections.Counter(A)
if c==len(A):
    print("YES")
else:
    print("NO")

### FIXED CODE ###

import collections
n=int(input())
A = list(map(int, input().split()))
c=collections.Counter(A)
if len(c)==len(A):
    print("YES")
else:
    print("NO")
import sys
import math
K, A, B = list(map(int, input().split()))

if (A >= K):
    print('1')
    sys.exit()
elif (A - B) <= 0:
    print('-1')
    sys.exit()
d = A-B
p = K-A
q = int(p/d)
if ((p % d) != 0):
    q += 1
print(str(2*q + 1))


### FIXED CODE ###

import sys
import math
K, A, B = list(map(int, input().split()))
 
if (A >= K):
    print('1')
    sys.exit()
elif (A - B) <= 0:
    print('-1')
    sys.exit()
d = A-B
p = K-A
q = int(p//d)
if ((p % d) != 0):
    q += 1
print(str(2*q + 1))
# ABC112A - Programming Education
def main():
    N, A, B = map(int, open(0).read().split())
    flg = N == 1
    print("Hello World" if flg else A + B)


if __name__ == "__main__":
    main()

### FIXED CODE ###

# ABC112A - Programming Education
n = int(input())
if n == 1:
    print("Hello World")
else:
    a, b = list(map(int, [input().rstrip() for _ in range(2)]))
    print(a + b)
N, K = map(int, input().split())
A = list(map(int, input().split()))
B = list(reversed(sorted([A.count(b) for b in set(A)])))
print(sum(C[K:len(C)]))

### FIXED CODE ###

N, K = map(int, input().split())
A = list(map(int, input().split()))
B = {i:0 for i in set(A)}
for a in A:
    B[a] += 1
print(sum(sorted(B.values())[:-K]))
a,b = map(chr, input().split())
print("=" if a == b else ">" if a > b else "<")

### FIXED CODE ###

a,b = map(ord, input().split())
print("=" if a == b else ">" if a > b else "<")
q, k = list(map(int, input().split()))
list = [int(i) for i in input()]

# 0 ,1 のまとまりを作る
sum01 = []
pre = 1
cnt = 0
# 111010
# 001010
for i, e in enumerate(list):
    if e != pre:
        sum01.append(cnt)
        cnt = 1
        pre = e
    else:
        cnt += 1
if cnt != 0:
    sum01.append(cnt)

if len(sum01) % 2 == 1:
    sum01.append(0)

print(sum01)
Add = 2 * k + 1
answer = 0
for i in range(0, len(sum01), 2):
    temp = 0
    left = i
    right = min(i + Add, len(sum01))
    for j in range(left, right, 1):
        temp += sum01[j]
    answer = max(temp, answer)

print(answer)

'''

### FIXED CODE ###

q, k = list(map(int, input().split()))
list = [int(i) for i in input()]

# 0 ,1 のまとまりを作る
sum01 = []
pre = 1
cnt = 0
# 111010
# 001010
for i, e in enumerate(list):
    if e != pre:
        sum01.append(cnt)
        cnt = 1
        pre = e
    else:
        cnt += 1
if cnt != 0:
    sum01.append(cnt)

if len(sum01) % 2 == 1:
    sum01.append(0)

# print(sum01)
Add = 2 * k + 1
ruiseki = [0]
for i, e in enumerate(sum01):
    ruiseki.append(ruiseki[i] + sum01[i])

# print(ruiseki)
answer = 0
for i in range(0, len(sum01), 2):
    left = i
    right = min(i + Add, len(sum01))
    temp = ruiseki[right] - ruiseki[left]
    answer = max(temp, answer)

print(answer)
t = str(input())

if t[0] == "?" and t[1] == "D":
    t = "P" + t[1:]
    

print(t.replace('?', 'D'))

### FIXED CODE ###

t = str(input())
print(t.replace('?', 'D'))
a = int(input('')) b = int(input(''))
area = a*b
lenght = 2*a + 2*b
print(area) print(lenght)


### FIXED CODE ###

a, b = list(map(int, input().split()))
x= a*b
y= 2*a + 2*b
print(x,y)
import math
N,K=map(int,input().split())

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

for i in range(1,K+1):
    print((combinations_count(N-K+1,i)*combinations_count(K-1,i-1))%(10*10*10*10*10*10*10*10*10+7))
    

### FIXED CODE ###

import math
N,K=map(int,input().split())

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

for i in range(1,K+1):
    if N-K+1>=i:
        print((combinations_count(N-K+1,i)*combinations_count(K-1,i-1))%(10**9+7))
    else:
        print(0)