Harryxun/stf_run huggingface dataset:
s = list(input())

if s[0] != "1":
    print(int(s[0]))
else:
    print(int(s[1]))
    
    

### FIXED CODE ###


s = list(input())

k = int(input())

cnt = 0

if len(s) == 1:
    print(s[0])
else:
    if s[0] == "1":
        
        while s[0] == "1":
            cnt += 1
            del s[0]
            if cnt>=k:
                print(1)
                break
            
        if cnt<k:
            print(s[0])
            
    else:
        print(s[0])
NXY = list(map(int, input().split()))
N, X, Y = NXY[0], NXY[1], NXY[2]


def flatten_2dim(array):
    return [item for sublist in array for item in sublist]


dp = []
for i in range(N):
    dp.append([])
    for j in range(N):
        if j < i:
            dp[i].append(0)
        else:
            dp[i].append(j-i)

for i in range(int(N*0.5)):
    for j in range(int(N*0.5)):
        if i == 0 and j == 0:
            dp[X-1][Y-1] = 1
        else:
            dp[X-1-i][Y-1-j] = min(1+i+j, dp[X-1-i][Y-1-j])
            dp[X-1+i][Y-1-j] = min(1+i+j, dp[X-1+i][Y-1-j])
            dp[X-1-i][Y-1+j] = min(1+i+j, dp[X-1-i][Y-1+j])
            dp[X-1+i][Y-1+j] = min(1+i+j, dp[X-1+i][Y-1+j])
print(dp)
for k in range(1, N):
    print(flatten_2dim(dp).count(k))


### FIXED CODE ###

n,x,y = list(map(int,input().split()))
ans = [0]*(n-1)
for i in range(n-1):
    for j in range(i+1,n):
        ans[min(j-i,1+abs(x-1-i)+abs(y-1-j))-1]+=1
for num in ans:
    print(num)
#からの配列
l = []
amount = 0
for i in range(N):
    for j in range(N-1):
        if numbers[j] == i+1:
            #print('numbers = {}'.format(numbers[j]))
            amount = amount + 1
    #print('amount = {}'.format(amount))
    l.append(amount)
    #print('l[{}] = {}'.format(i,l[i]))
    #print('--------------------')
    amount = 0

for i in range(N):
    print(l[i])

### FIXED CODE ###

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

result = [0] * N
for i in numbers:
    result[i- 1] += 1
    
for i in range(N-1):
    print(result[i])
print(0)
# -*- coding:utf-8 -*-
import sys
import math

array =[]
for line in sys.stdin:
    array.append(line)

for i in range(array):
    num = array[i].sprit(' ')
    a = num[0]
    b = num[1]
    n = a + b
    print(int(math.log10(x) + 1))

### FIXED CODE ###

# -*- coding:utf-8 -*-
import sys
import math

array =[]
for line in sys.stdin:
    array.append(line)
    
for i in range(len(array)):
    num = array[i].split(' ')
    a = int(num[0])
    b = int(num[1])
    n = a + b
    print(int(math.log10(n) + 1))
from math import factorial

def combinations_count(n, r):
    ''' 組み合わせ '''
    return factorial(n) // (factorial(n - r) * factorial(r))

#print(combinations_count(5, 2))
def modpow(a, n, MOD):
  res = 1
  while (n > 0):
    if (n & 1):
      res = res * a % MOD
    a = a * a % MOD
    n >>= 1
  return res
 

K = int(input())
S = str(input())
mod = 10 ** 9 + 7
N = len(S)
L = N + K

ans = 0
p = N + K - 1
now = combinations_count(p, N - 1) % mod

for i in range(K + 1):
  a = pow(25, K - i, mod)
  b = pow(26, i, mod)
  c = a * b % mod
  ans += now * c % mod
  ans = ans % mod
  p -= 1
  now = int(now * (p - N + 2) / (p + 1)) % mod
print(ans)
  
  
  
  
  




### FIXED CODE ###

from math import factorial

def combinations_count(n, r):
    ''' 組み合わせ '''
    return factorial(n) // (factorial(n - r) * factorial(r))

#print(combinations_count(5, 2))
def modpow(a, n, MOD):
  res = 1
  while (n > 0):
    if (n & 1):
      res = res * a % MOD
    a = a * a % MOD
    n >>= 1
  return res

def cmb(n, r, p):
    if (r < 0) or (n < r):
        return 0
    r = min(r, n - r)
    return fact[n] * factinv[r] * factinv[n-r] % p

p = 10 ** 9 + 7
mod = 10 ** 9 + 7
N = 2 * 10 ** 6 + 1  # N は必要分だけ用意する
fact = [1, 1]  # fact[n] = (n! mod p)
factinv = [1, 1]  # factinv[n] = ((n!)^(-1) mod p)
inv = [0, 1]  # factinv 計算用
 
for i in range(2, N + 1):
    fact.append((fact[-1] * i) % p)
    inv.append((-inv[p % i] * (p // i)) % p)
    factinv.append((factinv[-1] * inv[-1]) % p)

K = int(input())
S = str(input())
N = len(S)

ans = 0
p = N + K - 1
#now = combinations_count(p, N - 1) % mod

for i in range(K + 1):
  p = N + K - i - 1
  now = cmb(p, N - 1, mod)
  a = pow(25, K - i, mod)
  b = pow(26, i, mod)
  c = a * b % mod
  ans += now * c % mod
  ans = ans % mod
print(ans)
N = int(input())
ans = "No"
for i in range (1,10):
  for j in range(1,10):
    if N == i * j:
      ans = "Yes"
      break
print(ans)

### FIXED CODE ###

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

if A // 10 == 0 and B // 10 == 0:
  print(A * B)
else:
  print(-1)
# 2 5
#5 10
#9 9
N = int(input())

U = map(int, input())
for i in range(1, N):
    U[i] += U[i-1]

D = map(int, input())
for i in range(N-2, -1):
    D[i] += D[i+1]

result = 0
for i in range(N):
    result = max(U[i]+D[i], result)

print(result)

### FIXED CODE ###

N = int(input())

U = list(map(int, input().split()))
for i in range(1, N):
    U[i] += U[i-1]

D = list(map(int, input().split()))
for i in range(N-2, -1, -1):
    D[i] += D[i+1]

result = 0
for i in range(N):
    result = max(U[i]+D[i], result)

print(result)
print(*reversed(map(int,input().split())))


### FIXED CODE ###

print(*reversed(sorted(map(int,input().split()))))
targ, length = map(int, input().split(' '))

banned = [False] * 100

bans = input()
if bans != '':
    for ban in bans.split(' '):
        banned[int(ban) - 1] = True

for dist in range(100):
    if banned[targ - dist - 1]:
        print(targ - dist)
        exit()
    elif banned[targ + dist - 1]:
        print(targ + dist)
        exit()


### FIXED CODE ###

targ, length = map(int, input().split(' '))

banned = [False] * 100

bans = input()
if bans != '':
    for ban in bans.split(' '):
        banned[int(ban) - 1] = True

for dist in range(100):
    if targ - dist > 0:
        if not banned[targ - dist - 1]:
            print(targ - dist)
            exit()
    else:
        print(targ - dist)
        exit()
    if targ + dist <= 100:
        if not banned[targ + dist - 1]:
            print(targ + dist)
            exit()
    else:
        print(targ + dist)
        exit()
import math
A,B,C,D = map(int,input().split())
W = C*D//math.gcd(C,D)
X = B//C -((A-1)//C)
Y = B//D -((A-1)//D)
Z = B//W -((A-1)//W)
ans = (B-A+1)-(X+Y-Z)
print(ans)

### FIXED CODE ###

import fractions
A,B,C,D = map(int,input().split())
all = B-A+1
X = fractions.gcd(C,D)
gC = B//C - ((A-1)//C)
gD = B//D - ((A-1)//D)
gcdcd = C*D//X
gCD = B//gcdcd - ((A-1)//gcdcd)
ans = all - (gC+gD -gCD)
print(ans)
N,M = map(int,input().split())
for i in range(M//N,0,-1):
    if m%i==0:
        print(i)
        break
    else: break

### FIXED CODE ###

def solve():
    n,m = map(int,input().split())
    for i in range(m//n,0,-1):
        if m%i==0: break
    print(i)
solve()
import sys

def point(sushi):
  d = 0
  t = []
  for s in sushi:
    d += s[1]
    t.append(s[0])
  return d + len(set(t))**2


def rm_ate(sushi, rest):
  t = set([s[0] for s in sushi])
  return [r for r in rest if not r[0] in t]


def rm_dup(sushi):
  sushi = sorted(sushi, key=lambda x:-x[1])
  d = []
  r = []
  for s in sushi:
    if s[0] in d:
      r.append(s)
    else:
      d.append(s[0])
  sushi.remove(r[-1])
  return sushi


def main():
  input = sys.stdin.readline
  n, k = map(int, input().split())
  sushi = []
  for _ in range(n):
    t, d = map(int, input().split())
    sushi.append([t,d])
  sushi = sorted(sushi, key=lambda x:x[1])
  temp = sushi[-k:]
  rest = rm_ate(temp, sushi[:-k])
  ans = point(temp)
  while rest:
    temp = rm_dup(temp)
    temp += [rest.pop()]
    res = point(temp)
    ans = max(ans, res)
    rest = rm_ate(temp, rest)
  print(ans)


if __name__ == '__main__':
  main()

### FIXED CODE ###

import sys

def point(sushi, n, k):
  sushi = sorted(sushi, key=lambda x:-x[1])
  
  ate_t = set()
  dpoint = 0
  dup = []
  for s in sushi[:k]:
    t = s[0]
    d = s[1]
    if t in ate_t:
      dup.append(d)
    ate_t.add(t)
    dpoint += d
  
  ans = len(ate_t)**2 + dpoint
  
  for s in sushi[k:]:
    t = s[0]
    d = s[1]
    if len(dup) <= 0:
      break
    if t in ate_t:
      continue
    ate_t.add(t)
    rm = dup.pop()
    dpoint = dpoint - rm + d
    res = len(ate_t)**2 + dpoint
    ans = max(ans, res)
  
  return ans

def main():
  input = sys.stdin.readline
  n, k = map(int, input().split())
  sushi = []
  for _ in range(n):
    t, d = map(int, input().split())
    sushi.append([t,d])
  print(point(sushi, n, k))


if __name__ == '__main__':
  main()
n,p = list(map(int,input().split()))
S = input()

if p == 2 or p == 5:
  ans = 0
  for i,s in enumerate(S):
    if int(s)%p == 0:
      ans += i+1
  print(ans)
  exit()

def MS(i,s,pre):
  return (s*i +pre)%p
 
M = [0]*p
M[0] = 1
t = 1
pre = 0
for s in S[::-1]:
  pre += (int(s)*t)%p
  M[pre] += 1
  t *= 10

ans = sum(map(lambda m:(m*(m-1))//2, M))
print(ans)



### FIXED CODE ###

n,p = list(map(int,input().split()))
S = input()

if p == 2 or p == 5:
  ans = 0
  for i,s in enumerate(S):
    if int(s)%p == 0:
      ans += i+1
  print(ans)
  exit()

def MS(i,s,pre):
  return (s*i +pre)%p
 
M = [0]*p
M[0] = 1
t = 1
now = 0
for i in S[::-1]:
    i = int(i)
    now += i*t
    now %= p
    M[now] += 1
    t = t*10%p

ans = sum(map(lambda m:(m*(m-1))//2, M))
print(ans)
import functools


@functools.lru_cache(maxsize=None)
def rec(c):
    if c <= 0:
        return 0 if c == 0 else INF
    ret = INF
    for coin in coins:
        ret = min(ret, rec(c-coin) + 1)
    return ret

INF = 10**6
N, M = map(int, input().split())
coins = [int(x) for x in input().split()]
print(rec(N))

### FIXED CODE ###

n, m = map(int, input().split())
C = list(map(int, input().split()))
INF = 10**5
dp = [INF for _ in range(n+1)]
dp[0] = 0
for i in range(n):
    for c in C:
        if i + c <= n:
            dp[i+c] = min(dp[i+c], dp[i]+1)
print(dp[n])
n, x = map(int, input().split())

f_dict = {
  0: 1
}
def f(n):
  if f_dict.get(n):
    return f_dict.get(n)
  return (3 + f(n-1) * 2)


patty_dict = {
  0: 1
}
def total_patty(n):
  if patty_dict.get(n):
    return patty_dict.get(n)
  return (1 + 2 * total_patty(n - 1))

def count_patty(n, x):
  if x == 0:
    return 0
  elif 1 <= x and x <= f(n - 1) + 1:
    return count_patty(n - 1, x - 1)
  elif x == f(n - 1) + 2:
    return total_patty(n - 1) + 1
  elif f(n - 1) + 2 <= x and x <= 2 * f(n - 1) + 2:
    return total_patty(n - 1) + 1 + count_patty(n - 1, x - f(n - 1) - 2)
  else:
    return total_patty(n)

print(count_patty(n, x))

### FIXED CODE ###

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

f_dict = {
  0: 1
}
def f(n):
  if f_dict.get(n):
    return f_dict.get(n)
  return (3 + f(n-1) * 2)


patty_dict = {
  0: 1
}
def total_patty(n):
  if patty_dict.get(n):
    return patty_dict.get(n)
  return (1 + 2 * total_patty(n - 1))

def count_patty(n, x):
  if n == 0 and x == 1:
    return 1
  elif x == 0:
    return 0
  elif 1 <= x and x <= f(n - 1) + 1:
    return count_patty(n - 1, x - 1)
  elif x == f(n - 1) + 2:
    return total_patty(n - 1) + 1
  elif f(n - 1) + 2 <= x and x <= 2 * f(n - 1) + 2:
    return total_patty(n - 1) + 1 + count_patty(n - 1, x - f(n - 1) - 2)
  else:
    return total_patty(n)

print(count_patty(n, x))
n = int(input())
ip = []

for i in range(n):
  a = int(input())
  ip.append(a)
  for j in range(a):
    x,y = map(int,input().split())
    ip.append([x,y])

max = 0    
for i in range(n) :
  max += 2**i

ans = 0
for i in range(0,max+1) :
  s = [2 for _ in range(n)]
  bit = i
  count = 0
  index = 0
  check = 0
  for j in range(n) :
    if bit%2 == 1 :
      if s[j] == 0 :
        check = 1
      s[j] = 1
    else :
      if s[j] == 1 :
        check = 1
      s[j] = 0
    bit = bit//2
    for k in range(ip[index]) :
      if s[j] == 1 :
        if ip[index+1+k][1] == 1 :
          if s[ip[index+1+k][0]-1] == 0 :
            check = 1
          s[ip[index+1+k][0]-1] = 1
        elif ip[index+1+k][1] == 0 :
          if s[ip[index+1+k][0]-1] == 1 :
            check = 1
          s[ip[index+1+k][0]-1] = 0
    index += ip[index] + 1
  if ans < s.count(1) and check ==0 :
    ans = s.count(1)

print(ans)

### FIXED CODE ###

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

if a+b+c >= 22 :
  print('bust')
else :
  print('win')
A,B,K = map(int, input().split())
tmp = list(range(A,B+1))
answer = list(set(tmp[:K])|set(tmp[-K:]))
answer.sort()
print(*answer, sep='\n')

### FIXED CODE ###

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

ak = [i for i in range(a, min(b + 1, a + k))]
bk = [i for i in range(max(a, b - k + 1), b + 1)]

answer = list(set(ak) | set(bk))
answer.sort()
print(*answer, sep='\n')
a,b,c=map(int,input().split())
if a==b==c:
  print(1)
elif a=!b=!=!c:
  print(3)
else:
  print(2)

### FIXED CODE ###

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

print(len(set(abc)))
import bisect
n,k=map(int,input().split())
o=list(map(int,input().split()))
a=1e9

p=bisect.bisect_left(o,0)
for l in range(k):
  r=l+k-1
  if l<=p<=r and r<n:
    if o[l]>=0:
      v=abs(o[r])
    else:
      a=abs(o[l])+2*abs(o[r])
      b=2*abs(o[l])+abs(o[r])
      v=min(a,b)
  a=min(a,v)
print(a)

### FIXED CODE ###

n,k=map(int,input().split())
x=list(map(int,input().split()))
v=1e9
for l in range(n-k+1):
  r=l+k-1
  a=abs(x[l])+abs(x[l]-x[r])
  b=abs(x[r])+abs(x[l]-x[r])
  v=min(v,min(a,b))
print(v)
while True:
  x = input()
  y = input()
  print min(x,y), max(x,y)

### FIXED CODE ###

while True:
  x,y = map(int,raw_input().split())
  if x == y == 0:
    break
  print min(x,y), max(x,y)
import sys

#sys.stdin = open('b_2.txt', 'r')

N = int(raw_input())
rest = [0 for _ in range(N)]
ins = [0 for _ in range(N)]
pairs = 0
for x in range(N):
	n = long(raw_input())
	ins[x] = n
	pairs += n / 2
	rest[x] = n % 2

for x in range(0, N - 1, 1):
	if ((rest[x] == 1) and (rest[x + 1] == 1)):
		pairs += 1
	elif ((rest[x] == 1) and (rest[x + 1] == 0) and (ins[x + 1] > 0)):
		rest[x + 1] = 1
		ins[x + 1] -= 2
		rest[x] = 0
	else:
		pass

print str(pairs)


### FIXED CODE ###

import sys
#sys.stdin = open('a_3.txt', 'r')
chars = list(raw_input())
#N, E, S, W
directions = [0 for _ in range(4)]

for c in chars:
	if c == 'N':
		directions[0] = 1
	elif c == 'E':
		directions[1] = 1
	elif c == 'S':
		directions[2] = 1
	else:
		directions[3] = 1

if ((directions[0] == directions[2]) and (directions[1] == directions[3])):
	print 'Yes'
else:
	print 'No'
n=int(input())-1
j=26
while j<=n:
  n-=j
  j*=26
j/=26
ret = ""
while j:
  ret += "abcdefghijklmnopqrstuvwxyz"[n//j]
  n %= j
  j /= 26
print(ret)


### FIXED CODE ###

n=int(input())-1
j=26
while j<=n:
  n-=j
  j*=26
j//=26
ret = ""
while j:
  ret += "abcdefghijklmnopqrstuvwxyz"[n//j]
  #print(f'{n//j=}')
  n %= j
  j //= 26
print(ret)
from collections import defaultdict


def main():
    N = int(input())
    pairs = []
    for _ in range(N):
        pair = [int(e) for e in input().split()]
        pairs.append(pair)

    d = defaultdict(int)
    for pair in pairs:
        x, y, h = pair

        for X in range(101):
            for Y in range(101):
                H = h + (abs(X - x) + abs(Y - y))
                d[(X, Y, H)] += 1

    for k, v in d.items():
        if v == N:
            X, Y, H = k
            print(X, Y, H)


if __name__ == '__main__':
    main()


### FIXED CODE ###

def main():
    n = int(input())
    if n == 1:
        print("Hello World")
    else:
        a = int(input())
        b = int(input())
        print(a + b)


if __name__ == '__main__':
    main()
a,b,c=map(int,input().split())
if a==5 and b==7 and c==5&:
  print(YES)
elif a==5 and b==5 and c==7&:
  print(YES)
elif a==7 and b==5 and c==5&:
  print(YES)
else:
  print(NO) 

### FIXED CODE ###

a,b,c=map(int,input().split())
if a==5 and b==7 and c==5:
  print('YES')
elif a==5 and b==5 and c==7:
  print('YES')
elif a==7 and b==5 and c==5:
  print('YES')
else:
  print('NO')
import math

x = int(input())

ans = 1
for i in range(2, 9):
  d = (math.floor(x ** (1 / i))) ** i
  if d <= x:
    ans = max(ans, d)
  
print(ans)


### FIXED CODE ###

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

if abs(a - c) <= d:
  print('Yes')
  
elif abs(a - b) <= d and abs(b - c) <= d:
  print('Yes')
  
else:
  print('No')
D, N = map(int, raw_input().split())
if N == 100
 if D == 0:
    print(101)
 elif D == 1:
    print(10001)
 elif D == 2:
    print(1000001)
elif D == 0:
  print(N)
elif D == 1:
  print(N*100)
elif D == 2:
  print(N*10000)

### FIXED CODE ###

D, N = map(int, raw_input().split())
if N == 100:
 if D == 0:
    print(101)
 elif D == 1:
    print(10100)
 elif D == 2:
    print(1010000)
elif D == 0:
  print(N)
elif D == 1:
  print(N*100)
elif D == 2:
  print(N*10000)
H, W = map(int, input().split())
area = []
for i in range(H):
  area.append(input())

for i in range(H):
  for j in range(W):
    if area[i][j] == '#':
      print('#', end='')
    else:
      count = 0
      for k in range(max(0, i-1), min(i+1, H-1)+1):
        for l in range(max(0, j-1), min(j+1, W-1)+1):
          if area[k][l] == '#':
            count += 1
      print(count, end='')
  print()


### FIXED CODE ###

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

if a == b:
    print(c)
elif b == c:
    print(a)
else:
    print(b)
n = int(input())
a = []
counter = 0
a = input().split()
success_result = [0] * n
while True:
    for index, item in enumerate(a):
        if int(item) % 2 == 0:
            a[index] = int(item) / 2
            success_result[index] = True
        else:
            continue
    if all(success_result):
        counter += 1
        success_result = [None for _ in range(n)]
    else:
        break
print(counter)

### FIXED CODE ###

print(input().count("1"))
mycode = r'''
# distutils: language=c++
# cython: language_level=3
# cython: boundscheck=False
# cython: wraparound=False
# cython: infer_types=True
# cython: cdivision=True
# False:Cython はCの型に対する除算・剰余演算子に関する仕様を、(被演算子間の符号が異なる場合の振る舞いが異なる)Pythonのintの仕様に合わせ、除算する数が0の場合にZeroDivisionErrorを送出します。この処理を行わせると、速度に 35% ぐらいのペナルティが生じます。 True:チェックを行いません。

import numpy as np

# 読み込みはpython側で行う
import sys
readline = sys.stdin.buffer.readline
read = sys.stdin.readline #文字列読み込む時はこっち

cdef LL a_int(): return int(readline())

def ints(): return np.fromstring(readline(), sep=' ', dtype=np.int64)

cdef read_matrix(LL H,LL W):
    #return np.ndarray shape=(H,W) matrix
    lines=[]
    cdef LL _
    for _ in range(H): 
        lines.append(read())
    lines=' '.join(lines) #byte同士の結合ができないのでreadlineでなくreadで
    return np.fromstring(lines, sep=' ',dtype=np.int64).reshape(H,W)


N=a_int()
D=read_matrix(N,1)[:,0]
print(len(np.unique(D)))

'''

import sys
if sys.argv[-1] == 'ONLINE_JUDGE':  # コンパイル時
    import os
    with open('mycode.pyx', 'w') as f:
        f.write(mycode)
    os.system('cythonize -i -3 -b mycode.pyx')

import mycode


### FIXED CODE ###

mycode = r'''
# distutils: language=c++
# cython: language_level=3
# cython: boundscheck=False
# cython: wraparound=False
# cython: infer_types=True
# cython: cdivision=True
# False:Cython はCの型に対する除算・剰余演算子に関する仕様を、(被演算子間の符号が異なる場合の振る舞いが異なる)Pythonのintの仕様に合わせ、除算する数が0の場合にZeroDivisionErrorを送出します。この処理を行わせると、速度に 35% ぐらいのペナルティが生じます。 True:チェックを行いません。

ctypedef long long LL

import numpy as np

# 読み込みはpython側で行う
import sys
readline = sys.stdin.buffer.readline
read = sys.stdin.readline #文字列読み込む時はこっち

cdef LL a_int(): return int(readline())

def ints(): return np.fromstring(readline(), sep=' ', dtype=np.int64)

cdef read_matrix(LL H,LL W):
    #return np.ndarray shape=(H,W) matrix
    lines=[]
    cdef LL _
    for _ in range(H): 
        lines.append(read())
    lines=' '.join(lines) #byte同士の結合ができないのでreadlineでなくreadで
    return np.fromstring(lines, sep=' ',dtype=np.int64).reshape(H,W)


N=a_int()
D=read_matrix(N,1)[:,0]
print(len(np.unique(D)))


'''

import sys
if sys.argv[-1] == 'ONLINE_JUDGE':  # コンパイル時
    import os
    with open('mycode.pyx', 'w') as f:
        f.write(mycode)
    os.system('cythonize -i -3 -b mycode.pyx')

import mycode
N,M = map(int, input().split())
ans = 0
while not (N == 0 and M == 0):
 for i in range(N):
  for j in range(N):
   for k in range(N):
    if ( i==j or i==k or j==k):
    elif (i + j + k == M): ans += 1
print(ans)

### FIXED CODE ###

N,M = map(int, input().split())
ans = 0
while not (N == 0 and M == 0):
 for i in range(1, N+1):
  for j in range(i+1, N+1):
   k = M - i - j
   if ( k > N): pass
   elif  k <= j : break
   else: ans += 1
 print(ans)
 ans = 0
 N,M = map(int, input().split())
n,m = map(int,input().split())
c = [list(map(int,input().split())) for i in range(n)]
ca = sorted(c,key=lambda x:x[0])

import sys
sys.setrecursionlimit(200000000)
if n ==1:
    print(ca[0][0]*ca[0][1])
    sys.exit()
money = 0
i = 0
num = 0
while True:
    #print(str(i)+"だよ")
    if num + ca[i][1] <= m:
        num += ca[i][1]
        money += ca[i][0] * ca[i][1]
        i += 1
        #print(num,money)
    else:
        money += ca[i][0]*(m-num)
        break    
print(money)

### FIXED CODE ###

n,m = map(int,input().split())
c = [list(map(int,input().split())) for i in range(n)]
ca = sorted(c,key=lambda x:x[0])

import sys
if n ==1:
    print(ca[0][0]*ca[0][1])
    sys.exit()
money = 0
i = 0
num = 0
while True:
    #print(str(i)+"だよ")
    if num + ca[i][1] < m:
        num += ca[i][1]
        money += ca[i][0] * ca[i][1]
        i += 1
        #print(num,money)
    else:
        money += ca[i][0]*(m-num)
        break    
print(money)
from scipy.sparse import csr_matrix
from scipy.sparse.csgraph import dijkstra
import numpy as np
import sys
sys.setrecursionlimit(1000000000)
node_num = int(input())
nodes=input().split()




route_list=np.zeros((node_num,node_num))


mi_count=0
for i in range(node_num-1):
    if i+2<node_num:
        route_list[i][i+1]=abs(int(nodes[i+1])-int(nodes[i])) if abs(int(nodes[i+1])-int(nodes[i])) != 0 else 0.000000001
        route_list[i][i+2]=abs(int(nodes[i+2])-int(nodes[i])) if abs(int(nodes[i+2])-int(nodes[i])) != 0 else 0.000000001
    else:
        route_list[i][i+1]=abs(int(nodes[i+1])-int(nodes[i])) if abs(int(nodes[i+1])-int(nodes[i])) != 0 else 0.000000001


route_list = csr_matrix(route_list)
#print(route_list)
dist_matrix= dijkstra(csgraph=route_list, directed=False, indices=0, return_predecessors=False)

dis=dist_matrix[-1]

print(int(dis))

### FIXED CODE ###

N = int(input())
H = [0] + [int(h) for h in input().split()]
dp = [999999999 for _ in range(N + 1)]
dp[0] = 0
dp[1] = 0
dp[2] = abs(H[2] - H[1])
for i in range(3, N + 1):
    dp[i] = min(dp[i], dp[i - 1] + abs(H[i - 1] - H[i]), dp[i - 2] + abs(H[i - 2] - H[i]))

print(dp[N])
N,T =map(int,input().split())
t = input().split()
amount =0


    
for index in range(N-1):
    t_sub = t[index+1]-t[index]
    if t_sub <= T:
        amount+=t_sub
    else:
        amount+=T

        
amount +=T

print(amount)

### FIXED CODE ###

if __name__ == '__main__':
    N, T = map(int, input().split())
    ts = list(map(int, input().split()))
    
    
amount =0


    
for index in range(N-1):
    t_sub = ts[index+1]-ts[index]
    amount+=min(t_sub,T)

        
amount +=T

print(amount)
n = int(input())
money = []
tuka = []
for i in range(n):
  li = input().split()
  money.append(int(li[0]))
  tuka.append(li[1])
  
ans = 0
for j in range(n):
  if tuka[j] == "JPY":
    ans += money[j]
  else:
    ans += 380000 * money[j]
print(ans)

### FIXED CODE ###

n = int(input())
money = []
tuka = []
for i in range(n):
    li = input().split()
    money.append(float(li[0]))
    tuka.append(li[1])

ans = 0
for j in range(n):
    if tuka[j] == "JPY":
        ans += money[j]
    else:
        ans += 380000 * money[j]
print(ans)
x1,x2,x3,x4,x5 = map(int, input().split())

if x1 == 0:
    print(1)
elif x2 == 0:
    print(2)
elif x3 == 0:
    print(3)
elif x4 == 0:
    print(4)
elif x5 == 0:


### FIXED CODE ###

x1,x2,x3,x4,x5 = map(int, input().split())

if x1 == 0:
    print(1)
elif x2 == 0:
    print(2)
elif x3 == 0:
    print(3)
elif x4 == 0:
    print(4)
elif x5 == 0:
    print(5)
N = int(input())
C = [int(input()) for _ in range(N)]
   
i=0 
dic = {}
while i+1<len(C):
    dic[C[i]] = -1
    if C[i]==C[i+1]:
        C.pop(i+1)
    else:
        i+=1

DP = [1]
for i in range(len(C)):  
    if dic[C[i]]==-1:   
        DP.append(DP[-1])
    else:
        DP.append((DP[-1]+DP[dic[C[i]]])%(10**9+7))
    dic[C[i]] = i+1            
print(DP[-1])


### FIXED CODE ###

N = int(input())
C = [int(input()) for _ in range(N)]
C = [x for x,y in zip(C[:-1],C[1:]) if x!=y] + [C[-1]]

DP = [1]
dic = {}

for i in range(len(C)):   
    DP.append((DP[-1]+dic.get(C[i],0))%(10**9+7))    
    dic[C[i]] = DP[-1]
print(DP[-1])