Harryxun/stf_run huggingface dataset:
case = 0
while True:
    W = int(input())
    if W == 0:
        break
    N = int(input())
    case += 1
    # a list of [itemValue, itemWeight]
    items = [list(map(int,input().split(','))) for i in range(N)]
    dp = {}
    def bestVW(item, capa):
        if (item,capa) in dp:
            return dp[(item,capa)]
        elif item == 0:
            bestVWForCapa = items[item] if items[item][1] <= capa else [0,0]
            dp[(item,capa)] = bestVWForCapa
            return bestVWForCapa
        else:
            if items[item][1] > capa:
                bestVWForCapa = bestVW(item-1, capa)
                dp[(item,capa)] = bestVWForCapa
                return bestVWForCapa
            else:
                pickedVW = bestVW(item-1,capa)
                notPickedVW = list(map(sum, zip(items[item], bestVW(item-1, capa-items[item][1]))))
                bestVWForCapa = pickedVW if pickedVW[0] > notPickedVW[0] else notPickedVW 
                dp[(item,capa)] = bestVWForCapa
                return bestVWForCapa
    msg = 'Case '+case+':\n'
    print(msg)
    print('\n'.join(map(str,bestVW(N-1,W))))



### FIXED CODE ###

nCase = 0
while True:
    W = int(input())
    if W == 0: break
    nCase += 1
    N = int(input())
    # [(value, weight), ... ]
    items = [tuple(map(int, input().split(','))) for _ in range(N)]
    bestValueFor = [0] * (W + 1) # item -> best value, idx -> capacity 
    for item in items:
        for capa in reversed(range(W-item[1]+1)):
            # if taken wins not taken
            if bestValueFor[capa] + item[0] > bestValueFor[capa + item[1]]:
                bestValueFor[capa + item[1]] = bestValueFor[capa] + item[0]
    bestValue = max(bestValueFor)
    bestWeight = bestValueFor.index(bestValue)
    print('Case ',str(nCase),':',sep='')
    print(bestValue)
    print(bestWeight)
r,g,b = map(map, input().split())
number=int(r+g+b)
if number % 4 ==0:
    print('YES')
else:
    print('NO')


### FIXED CODE ###

r,g,b = input().split()
number=int(r+g+b)
if number % 4 ==0:
    print('YES')
else:
    print('NO')
k = int(input())
s = int(input())
if len(s) > k:
  print(s[:k])
else:
  print(s)

### FIXED CODE ###

k = int(input())
s = input()
if len(s) > k:
  print(s[:k] + '...')
else:
  print(s)
N, Q = map(int, input().split())
s=list(input())
g = [1] * (N + 2)
for i in range(Q):
    Point, RL = input().split()
    for j in range(len(s)):
        if Point == s[j]:
            if RL=="L":
                g[j] = g[j] + g[j+1]
                g[j+1] = 0
            else:
                g[j+2] = g[j+2] + g[j+1]
                g[j+1] = 0
            g[0] = 0
            g[N+1] = 0
print(sum(g))

### FIXED CODE ###

a, b, c=map(int, input().split()) 
if a == b == c:
   print("Yes")
else:
   print("No")
a, b = input().split()

if a == b:
 print('H')
else:
 print('D')s

### FIXED CODE ###

a, b = input().split()

if a == b:
 print('H')
else:
 print('D')
a = int(input())
b = int(input())
if 0 <= a and  a <= 5:
    print(0)
if 6 <= a  and a <= 12:
    print(b//2)
if 13 <= a and a <= 100:
    print(b)

### FIXED CODE ###

line = input()
numbers = [int(n) for n in line.split()]
if numbers[0] <= 5:
    predicted_value = 0
elif numbers[0] <= 12:
    predicted_value = numbers[1]//2
else:
    predicted_value = numbers[1]
print(predicted_value)
N,S = map(int, input().split())
As = list(map(int, input().split()))
i = 0
j = 0
sum = 0
m_l = float('inf')
"""
while True:
	while j < N and sum < S:
		sum += As[j]
		j += 1
	
	if sum < S:
		break
	m_l = min(j-i, m_l)
	sum -= As[i]
	i += 1
	
"""
while j < N:
	sum += As[j]
	j += 1
	if sum < s:
		continue
	while i <= j and sum >= S:
		m_l = min(j-i, m_l)
		sum -= As[i]
		i += 1

print(m_l if m_l != float('inf') else 0)


### FIXED CODE ###

n,s = map(int, input().split())
a = list(map(int, input().split()))
ans = float("inf")
ma = 0
mi = 0
v = 0
for i in range(n):
    v += a[i]
    if v >= s:
        ma = i
        while v >= s:
            v -= a[mi]
            mi += 1
        ans = min(ans, ma-mi+2)
ans = ans if ans != float("inf") else 0
print(ans)
input()
numbers = map(int, input().split())
print(max(numbers)-min(numbers))

### FIXED CODE ###

input()
numbers = list(map(int, input().split()))
print(max(numbers)-min(numbers))
import sys

sys.setrecursionlimit(4100000)


def inputs(num_of_input):
    ins = [input() for i in range(num_of_input)]
    return ins


def solve(blues, reds):
    blue_counts = {}
    red_counts = {}

    for b in blues:
        if b not in blue_counts:
            blue_counts[b] = 1
        else:
            blue_counts[b] += 1

    for r in reds:
        if r not in red_counts:
            red_counts[r] = 1
        else:
            red_counts[r] += 1

    max_count = 0
    for name, c in blue_counts.items():
        if name in red_counts:
            max_count = max(max_count, c - red_counts[name])
        else:
            max_count = max(max_count, c)
    return max_count


def string_to_int(string):
    return list(map(lambda x: int(x), string.split()))


if __name__ == "__main__":
    [N] = string_to_int(inputs())
    blues = inputs(N)
    [M] = string_to_int(inputs())
    reds = inputs(M)
    ret = solve(blues, reds)
    print(ret)


### FIXED CODE ###

import sys

sys.setrecursionlimit(4100000)


def inputs(num_of_input):
    ins = [input() for i in range(num_of_input)]
    return ins


def solve(blues, reds):
    blue_counts = {}
    red_counts = {}

    for b in blues:
        if b not in blue_counts:
            blue_counts[b] = 1
        else:
            blue_counts[b] += 1

    for r in reds:
        if r not in red_counts:
            red_counts[r] = 1
        else:
            red_counts[r] += 1

    max_count = 0
    for name, c in blue_counts.items():
        if name in red_counts:
            max_count = max(max_count, c - red_counts[name])
        else:
            max_count = max(max_count, c)
    return max_count


def string_to_int(string):
    return list(map(lambda x: int(x), string.split()))


if __name__ == "__main__":
    [N] = string_to_int(input())
    blues = inputs(N)
    [M] = string_to_int(input())
    reds = inputs(M)
    ret = solve(blues, reds)
    print(ret)
word = list(input())

count = 0  # 入れ替える個数を用意

if len(word) % 2 == 0:  # もしアルファベットの数が偶数の時
	for i in range(0,int(len(word)/2)):
    	if word[i] != word[int(len(word))-1-i]:
        	count += 1    
    print(count)

else:
	for j in range(0,int((len(word)+1)/2-1)):
    	if word[j] != word[int(len(word))-1-j]:
        	count += 1            
    print(count)


### FIXED CODE ###

word = list(input())

count = 0  # 入れ替える個数を用意

if len(word) % 2 == 0:  # もしアルファベットの数が偶数の時
  for i in range(0,int(len(word)/2)):
    if word[i] != word[int(len(word))-1-i]:
      count += 1    
  print(count)

else:
  for j in range(0,int((len(word)+1)/2-1)):
    if word[j] != word[int(len(word))-1-j]:
      count += 1
  print(count)
def gindex(l, r):
    L = l + N0; R = r + N0
    lm = (L // (L & -L)) >> 1
    rm = (R // (R & -R)) >> 1
    while L < R:
        if R <= rm:
            yield R
        if L <= lm:
            yield L
        L >>= 1; R >>= 1
    while L:
        yield L
        L >>= 1

def propagates(*ids):
    for i in reversed(ids):
        v = lazy[i-1]
        if v is None:
            continue
        lazy[2*i-1] = data[2*i-1] = lazy[2*i] = data[2*i] = v
        lazy[i-1] = None

def update(l, r, x):
    *ids, = gindex(l, r)
    propagates(*ids)

    L = N0 + l; R = N0 + r
    while L < R:
        if R & 1:
            R -= 1
            lazy[R-1] = data[R-1] = x
        if L & 1:
            lazy[L-1] = data[L-1] = x
            L += 1
        L >>= 1; R >>= 1
    for i in ids:
        data[i-1] = min(data[2*i-1], data[2*i])

def query(l, r):
    propagates(*gindex(l, r))
    L = N0 + l; R = N0 + r

    s = float('inf')
    while L < R:
        if R & 1:
            R -= 1
            s = min(s, data[R-1])
        if L & 1:
            s = min(s, data[L-1])
            L += 1
        L >>= 1; R >>= 1
    return s


from bisect import bisect_left
from sys import stdin

if __name__ == '__main__':
    n, q = map(int, stdin.readline().rstrip().split())
    stx = [list(map(int, stdin.readline().rstrip().split())) for _ in range(n)]
    l = [int(stdin.readline().rstrip()) for _ in range(q)]

    N = len(l)
    LV = (N-1).bit_length()
    N0 = 2**LV
    data = [float('inf')]*(2*N0)
    lazy = [None]*(2*N0)

    stx.sort(key=lambda x:x[2], reverse=True)
    for s, t, x in stx:
        i1 = bisect_left(l, s - 0.5 - x)
        i2 = bisect_left(l, t - 0.5 - x)
        update(i1, i2, x)

    for i in range(q):
        tmp = query(i, i+1)
        if tmp == float('inf'):
            print(-1)
        else:
            print(tmp)


### FIXED CODE ###

def update(l, r, v):
    L = l + N0; R = r + N0
    while L < R:
        if R & 1:
            R -= 1
            data[R-1] = v

        if L & 1:
            data[L-1] = v
            L += 1
        L >>= 1; R >>= 1
# a_iの現在の値を取得
def _query(k):
    k += N0-1
    s = INF
    while k >= 0:
        if data[k]:
            s = max(s, data[k])
        k = (k - 1) // 2
    return s
# これを呼び出す
def query(k):
    return _query(k)[1]

from bisect import bisect_left
from sys import stdin

if __name__ == '__main__':
    n, q = map(int, stdin.readline().rstrip().split())
    stx = [list(map(int, stdin.readline().rstrip().split())) for _ in range(n)]
    l = [int(stdin.readline().rstrip()) for _ in range(q)]

    INF = (-1, 2**31-1)
    N = len(l)
    N0 = 2**(N-1).bit_length()
    data = [None]*(2*N0)

    stx.sort(key=lambda x:x[2], reverse=True)
    for i, (s, t, x) in enumerate(stx):
        i1 = bisect_left(l, s - 0.5 - x)
        i2 = bisect_left(l, t - 0.5 - x)
        update(i1, i2, (i, x))

    for i in range(q):
        tmp = query(i)
        if tmp == INF[1]:
            print(-1)
        else:
            print(tmp)
import string

X,Y=map(int,input().split())
if ord(X)>ord(Y):
    print('>')
elif ord(X)==ord(Y):
    print('=')
else:
    print('<')

### FIXED CODE ###

X,Y=map(str,input().split())
if ord(X)>ord(Y):
    print('>')
elif ord(X)==ord(Y):
    print('=')
else:
    print('<')
n, blue, red = [int(x) for x in input().split()]

balls = "b"*blue + "r"*red
x = n // len(balls) + 1

row = balls*x

print(row[:n].count("b"))


### FIXED CODE ###

n, a, b = map(int, input().split())
period = a+b
times = n//period
k = n%period
n =  a if k >a else k
print(times*a + n)
s = str(input())
t = str(input())

print(t+s)

### FIXED CODE ###

s,t = map(str,input().split())
print(t+s)
N = int(input())
if N % 10 = 3:
 print('bon')
elif N % 10 = 0:
 print('pon')
elif N % 10 = 1:
 print('pon')
elif N % 10 = 6:
 print('pon')
elif N % 10 = 8:
 print('pon')
else:
 print('hon')

### FIXED CODE ###

N = int(input())

if N % 10 == 3:
 print('bon')
elif N % 10 == 0:
 print('pon')
elif N % 10 == 1:
 print('pon')
elif N % 10 == 6:
 print('pon')
elif N % 10 == 8:
 print('pon')
else:
 print('hon')
n = int(input)

print(n*(n-1)/2)

### FIXED CODE ###

n = int(input())

print(int(n*(n-1)//2))
MOD = 10**9 + 7

L = input()

p = [0] * (len(L)+1)
p[0] = 1
for i in range(1, len(L)+1):
    p[i] = p[i-1] * 2 % MOD

ans = 1
tmp = 0
for i in range(len(L)+1):
    tmp += p[i] * 2 % MOD
ans += p[tmp]

#ans = p[len(L)-1]
#isAllBit = True
#for i in range(len(L)-1, 0, -1):
#    if isAllBit and L[i] == '1':
#        ans += p[len(L)-1-i]
#        ans %= MOD

ans += (p[len(L)-1] - 1) * 2
ans %= MOD
if L.count('1') == len(L):
    ans += (p[len(L)] - 1) * 2
    ans %= MOD

print(ans)


### FIXED CODE ###

L = input()

MOD = 10**9 + 7

d = [0] * len(L)
in_d = [0] * len(L)

for i in range(len(L)):
    if i == 0:
        d[i] = 1
        in_d[i] = 2
        continue

    # (0, 0), (0, 1), (1, 0)
    if L[i] == '1':
        d[i] = (d[i-1]*3 + in_d[i-1]*1) % MOD
        in_d[i] = in_d[i-1]*2 % MOD
    else:
        d[i] = d[i-1]*3 % MOD
        in_d[i] = in_d[i-1]*1 % MOD

d[-1] = (d[-1] + in_d[-1]) % MOD
print(d[-1])
from collections import deque

def solve(n, m, q, A):
  if len(A) == m+1:
    rtn = 0
    for b, v in q.items():
      if v:
        for a, c, d in v:
          rtn += d if A[b]-A[a] == c else 0
    return rtn
  else:
    rtn = 0
    xs = []
    for i in range(A[-1], m+1):
      b = len(A)
      for a, c, _ in q[b]:
        if i-A[a] == c:
          xs.append(i)
    return max([solve(n, m, q, A+[x]) for x in (set(xs) if xs else range(A[-1], m+1))])

N, M, Q = map(int, input().split())
dic = {i:[] for i in range(1, M+1)}
for _ in range(Q):
  a, b, c, d = map(int, input().split())
  dic[b].append((a, c, d))
ans = 0
q = deque()
q.append([1])
while q:
  A = q.pop()
  if len(A) == N+1:
    rtn = 0
    for b, v in dic.items():
      if v:
        for a, c, d in v:
          rtn += d if A[b]-A[a] == c else 0
    ans = max(rtn, ans)
  else:
    for i in range(A[-1], M+1):
      b = len(A)
      if dic[b]:
        for a, c, d in dic[b]:
          if i-A[a] == c:
            q.append(A+[i])
      else:
        q.append(A+[i])
print(ans)

### FIXED CODE ###

from collections import deque
N, M, Q = map(int, input().split())
ABCD = [list(map(int, input().split())) for _ in range(Q)]
ans = 0
q = deque()
q.append([1])
while q:
  A = q.pop()
  if len(A) == N+1:
    ans = max(ans, sum([d if A[b]-A[a] == c else 0 for a, b, c, d in ABCD]))
  else:
    for i in range(A[-1], M+1):
      q.append(A+[i])
print(ans)
import fractions
import math

A, B = map(int, input().split())
C = fractions.gcd(A, B)
pfac = []

def get_primes(n):
  primes = [2]
  for i in range(3, (n+1), 2):
    for p in primes:
      if i % p == 0:
        break
      if i < p ** 2:
        primes.append(i)
        break
    else:
      primes.append(i)
  return primes

def get_primes2(n):
    if not isinstance(n, int):
        raise TypeError('n is int type.')
    if n < 2:
        raise ValueError('n is more than 2')
    prime = []
    limit = math.sqrt(n)
    data = [i + 1 for i in range(1, n)]
    while True:
        p = data[0]
        if limit <= p:
            return prime + data
        prime.append(p)
        data = [e for e in data if e % p != 0]

for p in get_primes2(min(C, 10**6)):
  if p ** 2 > C:
    break
  if C % p == 0:
    pfac.append(p)
    while C % p == 0:
      C //= p
if C != 1:
  pfac.append(C)


print(len(pfac) + 1)

### FIXED CODE ###

import fractions
import math

A, B = map(int, input().split())
C = fractions.gcd(A, B)
pfac = []

def get_primes(n):
  primes = [2]
  for i in range(3, (n+1), 2):
    for p in primes:
      if i % p == 0:
        break
      if i < p ** 2:
        primes.append(i)
        break
    else:
      primes.append(i)
  return primes

def get_primes2(n):
    if not isinstance(n, int):
        raise TypeError('n is int type.')
    if n == 1:
        return []
    prime = []
    limit = math.sqrt(n)
    data = [i + 1 for i in range(1, n)]
    while True:
        p = data[0]
        if limit <= p:
            return prime + data
        prime.append(p)
        data = [e for e in data if e % p != 0]

for q in get_primes2(min(C, 10**6)):
  if q ** 2 > C:
    break
  if C % q == 0:
    pfac.append(q)
    while C % q == 0:
      C //= q
if C != 1:
  pfac.append(C)


print(len(pfac) + 1)
N,K=map(int,input().split())
D,L={},[]
for _ in range(N):
    a,b=map(int,input().split())
    L.append(a)
    if a in D:D[a]=D[a]+b
    else:D[a]=b
l=list(set(L)).sort()
for i in l:
    K-=D[i]
    if K<=0:
        print(i)
        exit()

### FIXED CODE ###

N,K=map(int,input().split())
D,L={},[]
for _ in range(N):
    a,b=map(int,input().split())
    L.append(a)
    if a in D:D[a]=D[a]+b
    else:D[a]=b
l=list(set(L))
l.sort()
for i in l:
    K-=D[i]
    if K<=0:
        print(i)
        exit()
import numpy as np
s = list(input())
if np.sum(s) % 2 != 0:
    print('IMPOSSIBLE')
print(np.sum(s) % 2)

### FIXED CODE ###

x,y = map(int,input().split())
if (x+y) % 2 != 0:
    print('IMPOSSIBLE')
else:
	print(int((x+y) / 2))
import sys,collections as cl,bisect as bs,copy
sys.setrecursionlimit(100000)
mod = 10**9+7
Max = sys.maxsize
def l(): #intのlist
    return list(map(int,input().split()))
def m(): #複数文字
    return map(int,input().split())
def onem(): #Nとかの取得
    return int(input())
def s(x): #圧縮
    a = []
    aa = x[0]
    su = 1
    for i in range(len(x)-1):
        if aa != x[i+1]:
            a.append([aa,su])
            aa = x[i+1]
            su = 1
        else:
            su += 1
    a.append([aa,su])
    return a
def jo(x): #listをスペースごとに分ける
    return " ".join(map(str,x))
def max2(x): #他のときもどうように作成可能
    return max(map(max,x))
def In(x,a): #aがリスト(sorted)
    k = bs.bisect_left(a,x)
    if k != len(a) and a[k] ==  x:
        return k
    else:
        return False

n = onem()

on = []
wh = [[-1 for j in range(n)] for i in range(n)]
de = cl.deque()
for i in range(n):
    k = l()
    for j in range(n-1):
        k[j] -= 1
    k.reverse()
    de.append([k[0],i])
    on.append(cl.deque(k))


co = 0
ddd = cl.deque()
while True:
    ddd.clear()
    co += 1
    cl = [1 for i in range(n)]
    
    while de:
        kkk = de.popleft()
        if on[kkk[0]][0] == kkk[1] and cl[kkk[0]] and cl[kkk[1]]:
            cl[kkk[0]] = 0
            cl[kkk[1]] = 0
            on[kkk[0]].popleft()
            on[kkk[1]].popleft()
            if len(on[kkk[1]]) != 0:
                ddd.append([on[kkk[1]][0],kkk[1]])
            if len(on[kkk[0]]) != 0:
                ddd.append([on[kkk[0]][0],kkk[0]])
    de = copy.deepcopy(ddd)
    
    if sum(cl) == n:
        co = -1
        break
    elif len(de) == 0:
        break

print(co)





















### FIXED CODE ###

import collections as cl
def l(): #intのlist
    return list(map(int,input().split()))
def onem(): #Nとかの取得
    return int(input())
n = onem()

on = []
de = cl.deque()
ppp = [n-1 for i in range(n)]
for i in range(n):
    k = l()
    for j in range(n-1):
        k[j] -= 1
    k.reverse()
    de.append([k[0],i])
    on.append(cl.deque(k))


co = 1
ddd = cl.deque()
de.append([-1,-1])
ppppp = [1 for i in range(n)]
cl = ppppp[:]
while de:
    kkk = de.popleft()
    if kkk[0] == -1 and kkk[1] == -1:
        if sum(cl) == n:
            co = -1
            break
        if len(de) == 0:
            break
        de.append([-1,-1])
        co += 1
        cl = ppppp[:]

    elif ppp[kkk[0]] != 0 and on[kkk[0]][0] == kkk[1] and cl[kkk[0]] and cl[kkk[1]]:
        cl[kkk[0]] = 0
        cl[kkk[1]] = 0
        on[kkk[0]].popleft()
        on[kkk[1]].popleft()
        ppp[kkk[0]] -= 1
        ppp[kkk[1]] -= 1
        if ppp[kkk[1]] != 0 != 0 and ppp[kkk[0]] != 0 and on[kkk[1]][0] == kkk[0] and on[kkk[0]][0] == kkk[1]:
            de.append([on[kkk[1]][0],kkk[1]])
        else:
            if len(on[kkk[1]]) != 0:
                de.append([on[kkk[1]][0],kkk[1]])
            if len(on[kkk[0]]) != 0:
                de.append([on[kkk[0]][0],kkk[0]])


print(co)
from sys import stdin
from functools import lru_cache


@lru_cache(maxsize=1000)
def f(x, k, d):
    if k == 0:
        return x

    if x == 0:
        if k % 2 == 0:
            return 0
        if k % 2 == 1:
            return d
    if x > 0:
        return f(x-d, k-1, d)
    if x < 0:
        return f(x+d, k-1, d)


if __name__ == '__main__':
    X, K, D = [int(x) for x in stdin.readline().rstrip().split()]
    print(abs(f(X, K, D)))


### FIXED CODE ###

from sys import stdin


def f(x, k, d):
    if k == 0:
        return x

    absX = abs(x)
    tmp = absX // d

    if tmp > k:
        return absX - d * k
    else:
        absX = absX - d * tmp
        k = k - tmp
        if k % 2 == 0:
            return absX
        else:
            return abs(absX - d)


if __name__ == '__main__':
    X, K, D = [int(x) for x in stdin.readline().rstrip().split()]
    print(f(X, K, D))
n,q=map(int(input()).split())
s=list(str(input()))
l=[]
r=[]
ans=0
x=[]
for i in range(q):
  x1,y1=[int(i) for i in input().split()]
  x.append(x1)
  y.append(y1)
  
for j in range(0,q):
  for k in range(l[j],r[j]):
    if s[k]=="A" and s[k+1]=="C":
      ans+=1
    else:
      ans+=0
  x.append(ans)
  ans=0
  
for m in range(0,q):
  print(x[m])
      
      
      
  
  
  
  

### FIXED CODE ###

n,q=map(int,input().split())
s=list(str(input()))
l=[]
r=[]
ans=0
x=[0]
for i in range(q):
  l1,r1=map(int,input().split())
  l.append(l1)
  r.append(r1)

for j in range(0,n-1):
  if s[j]=="A" and s[j+1]=="C":
    ans+=1
    x.append(ans)
  else:
    x.append(ans)

for k in range(0,q):
  print(x[r[k]-1]-x[l[k]-1])
a,v = map(int,input().split())
b,w = map(int,input().split())
t = int(input())
if v*t >= abs(b-a) + W*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*t >= abs(b-a) + w*t:
    print('YES')
else:
    print('NO')
import sys
from math import factorial
from scipy.special import comb
 
def ncr(n, r, p): 
    return comb(n,r,exact=True) % p 

def check(x, y):
    if x < y:
        tmp = x
        x = y
        y = tmp
 
    n = x - y
    x -= 2 * n
 
    if (x + y) % 3 == 0:
        return True
    else:
        return False
    
 
# Read
line = sys.stdin.readlines()[0]
X, Y = map(int,line.split(' '))
 
# if not check(X, Y):
#     print(0)
#     exit(0)
 
m = int(1/3 * (2*Y - X))
n = int(Y - 2 * m)
 
if n < 0 or m < 0:
    print(0)
else:
    p = m if m < n else n
    print(ncr(n+m, p))


### FIXED CODE ###

import sys
from math import factorial

def ncr(n, r, p): 
    # initialize numerator 
    # and denominator 
    num = den = 1 
    for i in range(r): 
        num = (num * (n - i)) % p 
        den = (den * (i + 1)) % p 
    return (num * pow(den,  
            p - 2, p)) % p 

def check(x, y):
    if (x + y) % 3 == 0:
        return True
    else:
        return False
    

# Read
line = sys.stdin.readlines()[0]
X, Y = map(int,line.split(' '))

if not check(X, Y):
    print(0)
    exit(0)

m = int(1/3 * (2*Y - X))
n = int(Y - 2 * m)

if n < 0 or m < 0:
    print(0)
else:
    print(ncr(n+m, n, 10**9+7))
A, B, K = map(int, input().split())
L = list(range(A, B + 1))
if len(L) - 2 <= 2 * K:
    for l in L:
        print(l)
else:
    ans = []
    for i in range(K):
        ans.append(L[i])
        ans.append(L[-i - 1])
    for a in sorted(ans):
        print(a)

### FIXED CODE ###

A, B, K = map(int, input().split())
L = []

for i in range(K):
    if A + i > B - i:
        break
    else:
        L.append(A + i)
        L.append(B - i)

L = set(L)
L = sorted(L)

for l in L:
    print(l)
a, b  = input(), input()
if a>b:
    print 'GREATER'
else if a<b:
    print 'LESS'
else:
    print 'EQUAL'


### FIXED CODE ###

a, b  = input(), input()
if a>b:
    print 'GREATER'
elif a<b:
    print 'LESS'
else:
    print 'EQUAL'
n, d, a = map(int, input().split())
xh = [list(map(int, input().split())) for _ in range(n)]
xh.sort(key = lambda x:x[0])

cnt = 0
while len(xh) != 0:
    x, h = xh.pop(0)
    atk_end = x + d + d
    atk_cnt = (h + a - 1) // a
    cnt += atk_cnt
    for i in range(len(xh)):
        if xh[i][0] > atk_end:
            break
        xh[i][1] -= a * atk_cnt
    while xh[0][1] < 1:
        xh.pop(0)
        if len(xh) == 0:
            break

print(cnt)

### FIXED CODE ###

import math
from collections import deque

n, d, a = map(int, input().split())
xh = [list(map(int, input().split())) for _ in range(n)]
xh.sort(key=lambda x:x[0])
xh = deque(xh)

xh_field = deque()

cnt = 0
now_damage = 0
while xh:
    pos, hp = xh.popleft()
    if xh_field:
        while (xh_field and xh_field[0][0] < pos) :
            now_damage -= a * xh_field[0][1]
            xh_field.popleft() 
    if hp <= now_damage:
        pass
    elif hp > now_damage:
        atk_cnt = math.ceil((hp - now_damage) / a)
        cnt += atk_cnt
        now_damage += atk_cnt * a
        xh_field.append((2*d + pos, atk_cnt))        
print(cnt)
import math
n=int(input())
a=int(input())
b=int(input())
c=int(input())
d=int(input())
e=int(input())
mati=[a,b,c,d,e]
hito=[(n-1)//a,(n-1)//b,(n-1)//c,(n-1)//d,(n-1)//e]
print(hito+4)


### FIXED CODE ###

import math
n=int(input())
a=int(input())
b=int(input())
c=int(input())
d=int(input())
e=int(input())
miti=[a,b,c,d,e]
mini=min(miti)
retu=math.ceil(n/mini)
print(4+retu)