Harryxun/stf_run huggingface dataset:
n = int(input())

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

count = 1

for i in a:
    count*=i

x = 10**18

if count > x:
    print(-1)
    break
else:
    print(count)

### FIXED CODE ###

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

print(a*b)
a,b,c=input().split()
print("YES") if a[len(a)] == b[0] and b[len(b)] == c[0] else print("NO")

### FIXED CODE ###

S = input().split()
if S[0][-1] == S[1][0] and S[1][-1] == S[2][0]:
  print("YES")
else:
  print("NO")
N = int(input())
AB = [[int(c) for c in input().split()] for _ in range(N)]

s=0
possible=True
for a, b in sorted(AB, key=lambda x:x[1]):
    s+=a
    if s>b:
	possible = False
        break

print('Yes' if possible else 'No')

### FIXED CODE ###

N = int(input())
AB = [[int(c) for c in input().split()] for _ in range(N)]

s=0
possible=True
for a, b in sorted(AB, key=lambda x:x[1]):
    s+=a
    if s>b:
        possible = False
        break

print('Yes' if possible else 'No')
def mult(m):
  s = 1
  for x in m:
    s = s*x
    if s == 0:
      return 0
    if s > 10**18:
      return -1
   return s
n = int(input())
a = list(map(int,input().split()))
a.sort()
z = mult(a)
print(z)


### FIXED CODE ###

def mul(m) : 
      
    # Multiply elements one by one 
    res = 1
    for x in m: 
        res = res * x
        if res == 0:
             return 0 
        if res > 10**18:
             return -1
    return res
 
n = int(input())
a = list(map(int, input().split()))
a.sort()
z = mul(a)
print(z)
#35 C - Anti-Division　
import math
A,B,C,D = map(int,input().split())

# C と D の最小公倍数の個数
lcm = C*D//math.gcd(C,D)
cnt_lcm = B//lcm - A//lcm

# C の倍数の個数
cnt_C = B//C - (A-1)//C 

# D の倍数の個数
cnt_D = B//D - (A-1)//D

# (範囲内の整数) - (C の倍数 + D の倍数 - C,D の公倍数)
ans = (B - A + 1) - (cnt_C + cnt_D - cnt_lcm)

# 範囲が 1 しかないとき
if A == B:
    # C でも D でも割り切れるとき
    if A%C == 0 and A%D == 0:
        print(0)
    else:
        print(1)
else:
    print(ans)

### FIXED CODE ###

# 52 D - Megalomania
N = int(input())
work = []
for _ in range(N):
    a,b = map(int,input().split())
    work.append((a,b))

# 締め切りが早い順にソート
work = sorted(work,key = lambda x:x[1],reverse = False)

result = 'Yes'
t = 0
for i,j in work:
    t += i
    if t>j:
        result = 'No'
        break
print(result)
n=input()
if n%2==0:
    print(n//2)
else:
    print(n//2+1)
    

### FIXED CODE ###

n=int(input())
if n%2==0:
    print(n//2)
else:
    print(n//2+1)
def q(a,k):
 d[a]=k
 for b in t[a]:
  if'-1'!=b:q(b,k+1)
def n(a,k):
 h[a]=max(h[a],k)if a in h else k
 if'-1'!=p[a]:n(p[a],k+1)
t,p,s,d,h={},{},{},{},{}
n=int(input())
for _ in[0]*n:
 x,y,z=input().split()
 t[x]=set([y,z])-{'-1'}
 p[y]=p[z]=x
 s[y],s[z]=z,y
r=(set(t)-set(p)).pop()
p[r]=s[r]='-1'
q(r,0)
for i in t:
 if not t[i]:n(i,0)
for i in map(str,range(n)):
 print(f"node {i}: parent = {p[i]}, sibling = {s[i]}, degree = {len(t[i])}, depth = {d[i]}, height = {h[i]}, {'root'if d[i]==0else'internal node'if t[i]else'leaf'}")


### FIXED CODE ###

N=int(input())
t=[0]*N
r=set(range(N))
for _ in[0]*N:
 x,y,z=map(int,input().split())
 t[x]=[y,z]+[0]*5
 r-={y,z}
def f(i,p,s,d):
 if i<0:return-1
 k=t[i]
 l,r=k[:2]
 k[2:]=[p,s,(l!=-1)+(r!=-1),d,max(f(l,i,r,d+1),f(r,i,l,d+1))+1]
 return t[i][-1]
f(r.pop(),-1,-1,0)
for i in range(N):
 print('node {}: parent = {}, sibling = {}, degree = {}, depth = {}, height = {}, {}'.format(i,*t[i][2:],'root'if not t[i][5]else'internal node'if t[i][4]else'leaf'))
fib=[0,1]
for i in range(9999):
  fib.append(fib[-1]+fib[-2])
  
n,m=map(int,input().split())
hoge=[0]
ans=1
for i in range(m):
  hoge.append(int(input()))
hoge.append(n+1)

for i in range(len(hoge)-1):
  if(hoge[i+1]-hoge[i]==1):
    print(0)
    exit()
    
  ans=ans*max(1,fib[hoge[i+1]-hoge[i]-1])
  ans=ans%1000000007
  
print(ans%1000000007)

### FIXED CODE ###

fib=[0,1]
for i in range(100000):
  fib.append(fib[-1]+fib[-2])
  
n,m=map(int,input().split())
hoge=[-1]
ans=1
for i in range(m):
  hoge.append(int(input()))
hoge.append(n+1)

for i in range(len(hoge)-1):
  if(hoge[i+1]-hoge[i]==1):
    print(0)
    exit()
    
for i in range(len(hoge)-1):
  sa=hoge[i+1]-hoge[i]-1
  ans=ans*fib[sa]
  ans=ans%1000000007
print(ans)
a = [1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 5, 1, 2, 1, 14, 1, 5, 1, 5, 2, 2, 1, 15, 2, 2, 5, 4, 1, 4, 1, 51]

print(a[map(input())-1])

### FIXED CODE ###

a = [1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 5, 1, 2, 1, 14, 1, 5, 1, 5, 2, 2, 1, 15, 2, 2, 5, 4, 1, 4, 1, 51]
b = int(input())
print(a[b-1])
n, k = map(int, input().split())
monsters = list(map(int, input().split()))

monsters.sort(reverse=True)

if(len(monsters) > k):
    for i in range(k):
        monsters.pop(i)
        
    total_hp = sum(monsters)
    print(total_hp)
else: print(0)


### FIXED CODE ###

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

monsters.sort()

total_hp = 0
if(len(monsters) > k):
    for i in range(n-k):
        total_hp += monsters[i]
        
    print(total_hp)
else: print(0)
n,a,b = map(int,input().split())
lis = [int(input()) for i in range(n)]
more = a-b

def tansaku(x):
  cou = 0
  normal = b * x
  for hp in lis:
    r = hp -normal
    if r <= 0:continue
    cou += r // more
    
    if r % ab != 0:
      cou += 1
  return cnt <= t

left = 1
right = max(lis)
while right - left > 1:
  mid = (right + left)/2
  if tansaku(mid):
    right = mid
  else:
    left = mid
print(right)

### FIXED CODE ###

n,a,b = map(int,input().split())
lis = [int(input()) for i in range(n)]
more = a-b

def tansaku(x):
  cou = 0
  normal = b * x
  for hp in lis:
    r = hp -normal
    if r <= 0:continue
    cou += r // more
    
    if r % more != 0:
      cou += 1
  return cou <= x

left = 1
right = max(lis)
while right - left > 1:
  mid = (right + left)//2
  if tansaku(mid):
    right = mid
  else:
    left = mid
print(right)
a=input()
b=input()
def evenodd(a,b):
  if a*b%2==1:
    print("Odd")
  else:
    print("Even")
    
print(evenodd(a,b))

### FIXED CODE ###

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

def evenodd(a,b):
  if a*b%2==1:
    return "Odd"
  else:
    return"Even"
    
print(evenodd(a,b))
N = int(input())
H = list(map(int,input().split()))

NH = 1
for i in range(N-1):
    if H[i+1]=>max(H[0:i+1]):
        NH = NH + 1
    else:
        NH = NH

print(NH)

### FIXED CODE ###

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

NH = 1
for i in range(N-1):
    if H[i+1] >= max(H[0:i+1]):
        NH = NH + 1
    else:
        NH = NH

print(NH)
def main() :
    lst = list(map(int, input().split()))
    count = 1
    for n in lst :
        if n == 0 :
            break
        else :
            print(f"case {count}: {n}")
            count += 1



if __name__ == '__main__' :
    main()

### FIXED CODE ###

def main() :
    count = 1
    while True :
        n = input()
        if n == '0' :
            break
        else :
            print("Case {}: {}".format(count, n))
            count += 1


if __name__ == '__main__' :
    main()
import numpy as np


A = np.array([list(map(int, input().split())) for _ in range(3)])
n = int(input())
for _ in range(n):
  b = int(input())
  A = np.where(A == b, 0, A)
  
x = np.all(A[[0, 1, 2], [0, 1, 2]] == 0)
y = np.all(A[[0, 1, 2], [2, 1, 0]] == 0)
z = np.any(np.sum(A, axis=0) == 0)
w = np.any(np.sum(A, axis=1) == 0)

print(['Yes', 'No'][!x and !y and !z and !w])

### FIXED CODE ###

import numpy as np
 

A = np.array([list(map(int, input().split())) for _ in range(3)])
n = int(input())
for _ in range(n):
  b = int(input())
  A = np.where(A == b, 0, A)
  
x = np.all(A[[0, 1, 2], [0, 1, 2]] == 0)
y = np.all(A[[0, 1, 2], [2, 1, 0]] == 0)
z = np.any(np.sum(A, axis=0) == 0)
w = np.any(np.sum(A, axis=1) == 0)
 
print(['Yes', 'No'][not x and not y and not z and not w])
def factiring2(N,P):
	if N==1:
		ans=P
	else:
		ans=1
		for i in range(2,int(P**0.5)+1):
			cnt=0
			while P%i==0:
				P//=i
				cnt+=1
			if cnt>=N:
				ans*=i**(cnt//N)
	return ans	

	
		

			
	


N, P = map(int, input().split())
ans=factiring2(N,P)
print(ans)



### FIXED CODE ###

s = input()

r = "AKIHABARA"
r2 = "KIHBR"
ans = "YES"
if not 5 <= len(s) <= len(r):
    ans = "NO"
if "AA" in s:
    ans = "NO"
if not "KIH" in s:
    ans = "NO"
else:
    rem_A = ""
    for c in s:
        if c != "A":
            rem_A += c
    if not rem_A == r2:
        ans = "NO"
print(ans)
a, b, c = map(string, input().split())
name = a[0] + b[0] + c[0]
print(name)

### FIXED CODE ###

def main():
    s = aread("str")
    print(s[0][0] + s[1][0] + s[2][0])

def iread():
    return int(input())


def sread():
    return input()


def aread(t="int"):
    if t == "int":
        ret = [int(i) for i in input().split()]
    elif t == "str":
        ret = list(input().split( ))
    return ret


def scan():
    return list(map(int, input().split()))


if __name__ == '__main__':
    main()
N = int(input())
S = list(input())
r = S.count("R")
g = S.count("G")
b = S.count("B")

ans = r*g*b
for i in range(N):
  for j in range(N):
    k = 2*j-i
    if S[i] != S[j] and S[i] != S[k] and S[j] != S[k]:
      ans -= 1

print(ans)


### FIXED CODE ###

N = int(input())
A = list(input())
ans = A.count("R")*A.count("G")*A.count("B")
for i in range(N-2):
  for j in range(i+1, N-1):
    k = 2*j-i
    if k<N and A[k] != A[i] and A[k] != A[j] and A[i] != A[j]:
      ans -= 1
print(ans)
def main():
    S = list(input())

    N = len(S)

    if (S[0] == 0) or (S[-1] == 0):
        print (-1)
        return 0

    lst = []
    for i in range((N - 1) // 2):
        if S[i] != S[N - 2 - i]:
            print (-1)
            return 0
        if S[i] == '1':
            lst.append(i + 1)
    # print (lst)

    if lst[-1] * 2 != N:
        center = lst[-1] + 1
        for x in range(lst[-1] * 2 + 2, N + 1):
            print (center, x)

        before = 1
        n = lst[-1] * 2 + 2
        for tmp in lst[1:]:
            print (before, tmp)
            print (n - before, n - tmp)
            for x in range(tmp - before - 1):
                print (before + 1 + x, tmp)
                print (n - (before + 1 + x), n - tmp)
            before = tmp
        print (tmp, center)
        print (n - tmp, center)

    if lst[-1] * 2 == N:
        before = 1
        n = lst[-1] * 2 + 2
        for tmp in lst[1:]:
            print (before, tmp)
            print (n - before, n - tmp)
            for x in range(tmp - before - 1):
                print (before + 1 + x, tmp)
                print (n - (before + 1 + x), n - tmp)
            before = tmp
        print (tmp, n - tmp)

if __name__ == '__main__':
    main()

### FIXED CODE ###

def main():
    S = list(input())

    N = len(S)

    if (S[0] == '0') or (S[-1] == '1'):
        print (-1)
        return 0

    lst = []
    for i in range((N - 1) // 2):
        if S[i] != S[N - 2 - i]:
            print (-1)
            return 0
        if S[i] == '1':
            lst.append(i + 1)
    if N % 2 == 0 and S[N//2 - 1] == '1':
        lst.append(N//2)
    # print (lst)

    if lst[-1] * 2 != N:
        center = lst[-1] + 1
        for x in range(lst[-1] * 2 + 2, N + 1):
            print (center, x)

        before = 1
        n = lst[-1] * 2 + 2
        tmp = 1
        for tmp in lst[1:]:
            print (before, tmp)
            print (n - before, n - tmp)
            for x in range(tmp - before - 1):
                print (before + 1 + x, tmp)
                print (n - (before + 1 + x), n - tmp)
            before = tmp
        print (tmp, center)
        print (n - tmp, center)

    if lst[-1] * 2 == N:
        before = 1
        n = lst[-1] * 2 + 1
        tmp = 1
        for tmp in lst[1:]:
            print (before, tmp)
            print (n - before, n - tmp)
            for x in range(tmp - before - 1):
                print (before + 1 + x, tmp)
                print (n - (before + 1 + x), n - tmp)
            before = tmp
        print (tmp, n - tmp)

if __name__ == '__main__':
    main()
import numpy as np
import math

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

maenogoukei = a[0]
goukei = a[0]
kaisuu = 0

if goukei == 0:
	kaisuu += 1
	maenogoukei = -1 
	goukei = maenogoukei



for a_i in a[1:]:
	goukei += a_i
	if maenogoukei > 0 and goukei >= 0:
		kaisuu += goukei + 1
		goukei = -1
		maenogoukei = -1
	elif maenogoukei < 0 and goukei <= 0:
		kaisuu += -goukei + 1
		goukei = 1
		maenogoukei = 1
	else:
		maenogoukei += a_i




maenogoukei2 = a[0]
goukei2 = a[0]
kaisuu2 = 0

if goukei2 == 0:
	kaisuu2 += 1
	maenogoukei2 = 1 
	goukei2 = 1
else:
	kaisuu2 += math.abs(goukei2) + 1
	maenogoukei2 = - int(np.sign(a[0]))
	goukei2 = - int(np.sign(a[0]))


for a_i2 in a[1:]:
	goukei2 += a_i2
	if maenogoukei2 > 0 and goukei2 >= 0:
		kaisuu2 += goukei2 + 1
		goukei2 = -1
		maenogoukei2 = -1
	elif maenogoukei2 < 0 and goukei2 <= 0:
		kaisuu2 += -goukei2 + 1
		goukei2 = 1
		maenogoukei2 = 1
	else:
		maenogoukei2 += a_i2

print( min([kaisuu,kaisuu2]) )

### FIXED CODE ###

import numpy as np
import math

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

maenogoukei = a[0]
goukei = a[0]
kaisuu = 0

if goukei == 0:
	kaisuu += 1
	maenogoukei = -1 
	goukei = maenogoukei



for a_i in a[1:]:
	goukei += a_i
	if maenogoukei > 0 and goukei >= 0:
		kaisuu += goukei + 1
		goukei = -1
		maenogoukei = -1
	elif maenogoukei < 0 and goukei <= 0:
		kaisuu += -goukei + 1
		goukei = 1
		maenogoukei = 1
	else:
		maenogoukei += a_i




maenogoukei2 = a[0]
goukei2 = a[0]
kaisuu2 = 0

if goukei2 == 0:
	kaisuu2 += 1
	maenogoukei2 = 1 
	goukei2 = 1
else:
	kaisuu2 += abs(goukei2) + 1
	maenogoukei2 = - int(np.sign(a[0]))
	goukei2 = - int(np.sign(a[0]))


for a_i2 in a[1:]:
	goukei2 += a_i2
	if maenogoukei2 > 0 and goukei2 >= 0:
		kaisuu2 += goukei2 + 1
		goukei2 = -1
		maenogoukei2 = -1
	elif maenogoukei2 < 0 and goukei2 <= 0:
		kaisuu2 += -goukei2 + 1
		goukei2 = 1
		maenogoukei2 = 1
	else:
		maenogoukei2 += a_i2

print( min([kaisuu,kaisuu2]) )
n=int(input())
a=[]
for x in range(15):
    for y in range(26):
        a.append(x*7+y*4)
if not n in a:
    print("No")
else:
    print("Yes)

### FIXED CODE ###

n=int(input())
a=[]
for x in range(15):
    for y in range(26):
        a.append(x*7+y*4)
if not n in a:
    print("No")
else:
    print("Yes")
n=int(input())
A=list(map(int,input().split()))
dp=[inf for i in range(n)]
dp[0]=0
dp[1]=abs(A[1]-A[0])
for i in range(2,n):
	dp[i]=min(dp[i],abs(A[i-1]-A[i]),abs(A[i-2]-A[i]))
print(dp[n])

### FIXED CODE ###

n=int(input())
A=list(map(int,input().split()))
inf=float("inf")
dp=[inf for i in range(n)]
dp[0]=0
dp[1]=abs(A[1]-A[0])
for i in range(2,n):
	dp[i]=min(dp[i],abs(A[i-1]-A[i])+dp[i-1],abs(A[i-2]-A[i])+dp[i-2])
print(dp[n-1])
N, M = map(int, input().split())
INF = 1001001001
key = []

for i in range(M):
    a, b = map(int, input().split())
    c = list(map(int, input().split()))
    s = 0
    for j in range(b):
        c[j] -= 1
        s |= 1 << c[j]
    key.append([s, a])

dp = [INF] * (1<<N)
dp[0] = 0
for s in range(1<<N):
    for i in range(M):
        print(dp)
        t = s | key[i][0]
        cost = dp[s] + key[i][1]
        dp[t] = min(dp[t], cost)
ans = dp[-1]
print(ans)

### FIXED CODE ###

N, M = map(int, input().split())
INF = 1001001001
key = []

for i in range(M):
    a, b = map(int, input().split())
    c = list(map(int, input().split()))
    s = 0
    for j in range(b):
        c[j] -= 1
        s |= 1 << c[j]
    key.append([s, a])

dp = [INF] * (1<<N)
dp[0] = 0
for s in range(1<<N):
    for i in range(M):
        t = s | key[i][0]
        cost = dp[s] + key[i][1]
        dp[t] = min(dp[t], cost)

if dp[-1] == INF:
    print(-1)
else:
    print(dp[-1])
# https://atcoder.jp/contests/abc123/tasks/abc123_b

a = int(input())
b = int(input())
c = int(input())
d = int(input())
e = int(input())


orders = [a, b, c, d, e]


def last_order(nums):
    cnt = 130
    num = 130

    for i in nums:
        if i % 10 != 0:
            if cnt > int(str(i)[-1]):
                cnt = int(str(i)[-1])
                num = i

    return num


def move_up(num):
    if num % 10 != 0:
        return  num + (10 - (num % 10))
    else:
        return num

last = last_order(orders)
orders.remove(last)

total_time = 0

for i in orders:
    total_time = total_time + move_up(i)

print(total_time + last)

### FIXED CODE ###

# https://atcoder.jp/contests/abc123/tasks/abc123_b

a = int(input())
b = int(input())
c = int(input())
d = int(input())
e = int(input())


orders = [a, b, c, d, e]


def last_order(nums):
    cnt = 130
    num = 0

    for i in nums:
        if i % 10 != 0:
            if cnt > int(str(i)[-1]):
                cnt = int(str(i)[-1])
                num = i

    return num


def move_up(num):
    if num % 10 != 0:
        return  num + (10 - (num % 10))
    else:
        return num

last = last_order(orders)
if last:
    orders.remove(last)

total_time = 0

for i in orders:
    total_time = total_time + move_up(i)

print(total_time + last)
a, b = map(int, input().splt())

print((a * b) - (a + b - 1))

### FIXED CODE ###

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

print((a * b) - (a + b - 1))
r = int(input())
print("{0:f} {1:f}".format(r**2 * 3.141592653589, 2 * r * 3.141592653589))



### FIXED CODE ###

import math
r = float(input())  #入力値が実数の時
print("{0} {1}".format(r**2 * math.pi, 2 * r * math.pi))
from collections import defaultdict


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

g = defaultdict(list)
for _ in range(m):
    l, r, d = map(int, input().split())
    g[l].append((r, d))
    g[r].append((l, -d))


checked = {}
ds = [None for _ in range(n + 1)]


def check(v):
    for next_v, d in g[v]:
        if ds[next_v] is None:
            ds[next_v] = ds[v] + d
            if check(next_v) is False:
                return False
        elif not (ds[next_v] - ds[v] == d):
            return False
    return True


valid = True
for v in range(1, n + 1):
    if ds[v] is None:
        ds[v] = 0
    if check(v):
        valid = False
        break

if valid:
    print("Yes")
else:
    print("No")


### FIXED CODE ###

import sys

sys.setrecursionlimit(200002)

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

g = [[] for _ in range(n)]
for _ in range(m):
    l, r, d = map(int, input().split())
    l -= 1
    r -= 1
    g[l].append((r, d))
    g[r].append((l, -d))


ds = [None for _ in range(n + 1)]


def check(v):
    for next_v, d in g[v]:
        if ds[next_v] is None:
            ds[next_v] = ds[v] + d
            if check(next_v) is False:
                return False
        elif not (ds[next_v] - ds[v] == d):
            return False
    return True


valid = True
for v in range(n):
    if ds[v] is None:
        ds[v] = 0
    if check(v) is False:
        valid = False
        break

if valid:
    print("Yes")
else:
    print("No")
x, y, a, b, c = map(int, input().split())
arrayP = list(input().split())
arrayQ = list(input().split())
arrayR = list(input().split())
arrayP.sort(reverse=True)
arrayQ.sort(reverse=True)
arrayR.sort(reverse=True)
arrayAns = []
for i in range(x):
    arrayAns.append(int(arrayP[i]))
for i in range(y):
    arrayAns.append(int(arrayQ[i]))
arrayAns.sort()
for i in range(len(arrayR)):
    if arrayAns[0] <= int(arrayR[i]):
        arrayAns[0] = int(arrayR[i])
        arrayAns.sort()
print(sum(arrayAns))

### FIXED CODE ###

x, y, a, b, c = map(int, input().split())
arrayP = list(map(int, input().split()))
arrayQ = list(map(int, input().split()))
arrayR = list(map(int, input().split()))
arrayP.sort(reverse=True)
arrayQ.sort(reverse=True)
arrayR.sort(reverse=True)
arrayAns = []
for i in range(x):
    arrayAns.append(int(arrayP[i]))
for i in range(y):
    arrayAns.append(int(arrayQ[i]))
arrayAns.sort()
for i in range(min(len(arrayR), len(arrayAns))):
    if arrayAns[i] <= int(arrayR[i]):
        arrayAns[i] = int(arrayR[i])
    else:
        break
print(sum(arrayAns))
MOD = 10 ** 9 + 7

def gauss(n):
    ans = int (n * (n + 1) / 2)
    return(ans) 

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


if k - n == 1:
    print(1)
else:
    a = [0] * (gauss(n)+2)
    t = k
    for i in range(n):
        l = gauss(t-1)
        r = gauss(n) - gauss(n-t)
        a[l] += 1
        a[r+1] -= 1
        t += 1

    for i in range(1, len(a)):
        a[i] += a[i-1]

    print(sum(a) % MOD)


### FIXED CODE ###

MOD = 10 ** 9 + 7

def calc(a):
    smallest = a * (a-1) // 2
    largest = smallest + a * (n-a+1)
    return largest - smallest + 1 

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

ans = 0
for a in range(k, n+2):
    ans += calc(a)
    ans %= MOD

print(ans)
N = int(input())
S = input()

if(N % 2 == 1):
    print("No")
nn = N / 2
if(S[nn:] == S[:nn]):
    print("Yes")
else:
    print('No')


### FIXED CODE ###

N = int(input())
S = input()
 
if(N % 2 == 1):
    print("No")
    exit()
nn = int(N / 2)
if(S[nn:] != S[:nn]):
    print('No')
else:
    print("Yes")
s = list(input())
m = list('zyxwvutsrqponmlkjihgfedcba')
if len(s) < 26:
    for i in m:
        if not i in s:
            s.append(_)
            break
    print(''.join(s))
else:
    if s == m:
        print(-1)
    else:
        x = s[-1]
        for i in range(25)[::-1]:
            if x > s[i]:
                s = s[:i]
                s.append(i)
                break
            if i == 0:
                z = m.index(s[0])
                s = m[z-1]
        print(''.join(s))



### FIXED CODE ###

s = list(input())
m = list('zyxwvutsrqponmlkjihgfedcba')
if len(s) < 26:
    for i in m[::-1]:
        if not i in s:
            s.append(i)
            break
    print(''.join(s))
else:
    x = s[-1]

    for i in range(25)[::-1]:
        if x > s[i]:
            y = m.index(s[i])
            s = s[:i]
            for j in range(y)[::-1]:
                if not m[j] in s:
                    s.append(m[j])
                    break
            break
        else:
            x = s[i]
        if i == 0:
            print(-1)
            exit(0)
    print(''.join(s))
x=int(input())
fifth_power=[0]*200
for i in range(200):
    fifth_power[i]=(i+1)**5
for i in range(200):
    t=x-fifth_power[i]
    if x==1:
        print(0,-1)
        break
    elif fifth_power.count(abs(t))==1:
        if i%2==0:
            print(fifth_power.index(abs(t))+1,i+1)
            break
        elif ifth_power[fifth_power.index(abs(t))]-fifth_power[1]==x:
            print(fifth_power.index(abs(t))+1,i+1)
            break
        else:
            print(fifth_power.index(abs(t))+1,-i-1)
            break

### FIXED CODE ###

x=int(input())
fifth_power=[0]*200
for i in range(200):
    fifth_power[i]=(i+1)**5
for i in range(200):
    t=abs(x-fifth_power[i])
    if x==1:
        print(0,-1)
        break
    elif fifth_power.count(t)==1:
        if fifth_power[i]-t==x:
            print(i+1,fifth_power.index(t)+1)
            break
        else:
            print(i+1,-fifth_power.index(t)-1)
            break
A = int(input())
B = int(input())
C = int(input())
X = int(input())

res = 0

for a in range(A+1):
  for b in range(B+1):
    for c in range(C+1):
      if a*500 + b*100 + c*50 == N:
        res += 1
       
print(res)

### FIXED CODE ###

A = int(input())
B = int(input())
C = int(input())
X = int(input())
 
res = 0
 
for i in range(A + 1):
  for j in range(B + 1):
    for k in range(C + 1):
      if 500*i + 100*j + 50*k == X:
        res += 1
 
print(res)
n=int(input())
x=[0 for i in range(7)]
while True:
  if n==0:
    break
  for i in range(n):
    a=int(input())
    if 0<=a<10:
      x[0]+=1
    elif 10<=a<20:
      x[1]+=1
    elif 20<=a<30:
      x[2]+=1
    elif 30<=a<40:
      x[3]+=1
    elif 40<=a<50:
      x[4]+=1 
    elif 50<=a<60:
      x[5]+=1
    else:
      x[6]+=1
  for i in range(7):
    if x[i]==0:
      print(0)
    else:
      print('{}'.format(x[i]))


### FIXED CODE ###

while True:
  x=[0 for i in range(7)]
  n=int(input())
  if n==0:
    break
  for i in range(n):
    a=int(input())
    if 0<=a<10:
      x[0]+=1
    elif 10<=a<20:
      x[1]+=1
    elif 20<=a<30:
      x[2]+=1
    elif 30<=a<40:
      x[3]+=1
    elif 40<=a<50:
      x[4]+=1 
    elif 50<=a<60:
      x[5]+=1
    else:
      x[6]+=1
  for i in range(7):
    print(x[i])