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

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

#output
mod = pow(10, 9) + 7

def cmb(n, r):
    res = 1
    fac = 1
    for i in range(r):
        res *= (n-i)
        res %= mod
        fac *= (i+1)
        fac %= mod
    return res*pow(fac, mod-2, mod) % mod

if n <= k-1:
    print(cmb(2*n-1, n))
else:
    answer = 0
    for m in range(k+1):
        answer += cmb(n, m)*cmb(n-1, m) % mod
        answer %= mod
    print(answer)

### FIXED CODE ###

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

#output
mod = pow(10, 9) + 7

n_ = 4*10**5 + 5
fun = [1]*(n_+1)
for i in range(1,n_+1):
    fun[i] = fun[i-1]*i%mod
rev = [1]*(n_+1)
rev[n_] = pow(fun[n_],mod-2,mod)
for i in range(n_-1,0,-1):
    rev[i] = rev[i+1]*(i+1)%mod
def cmb(n,r):
    if n <= 0 or r < 0 or r > n: return 0
    return fun[n]*rev[r]%mod*rev[n-r]%mod

if n <= k-1:
    print(cmb(2*n-1, n))
else:
    answer = 0
    for m in range(k+1):
        answer += cmb(n, m)*cmb(n-1, m) % mod
        answer %= mod
    print(answer)
### BUGGY CODE ###

def countPower():
    power = 1
    N = int(input())
    i = 1
    if 1<=N<=10**5:
        while i <= N:
            power = i*power
            i += 1
    return power % (10**9 + 7)


if __name__=="__main__":
    print(countPower())


### FIXED CODE ###

import math

def countPower():
    power = 1
    N = int(input())
    if 1<=N<=10**5:
        power = math.factorial(N)
    return power % (10**9 + 7)

if __name__=="__main__":
    print(countPower())
### BUGGY CODE ###

from bisect import bisect_left
from decimal import Decimal

N, *A = map(Decimal, open(0).read().split())
N = int(N)
A.sort()

c = {}
intc = 0
ints = []
decs = []
for d in A:
    if d in c:
        c[d] += 1
        if d == int(d):
            intc += 1
    else:
        c[d] = 1
        if d == int(d):
            intc += 1
            ints.append(d)
        else:
            decs.append(d)

result = intc * (intc - 1) // 2
for i in range(len(decs)):
    a = decs[i]
    if a < 1:
        t = bisect_left(decs, 1 / a)
    else:
        t = i + 1
    for j in range(t, len(decs)):
        b = decs[j]
        t = a * b
        if t == int(t):
            #print(a, b)
            result += c[a] * c[b]

    if a < 1:
        t = bisect_left(ints, 1 / a)
    else:
        t = 0
    for j in range(t, len(ints)):
        b = ints[j]
        t = a * b
        if t == int(t):
            #print(a, b)
            result += c[a] * c[b]

print(result)


### FIXED CODE ###

def conv(s):
    if s.find('.') == -1:
        s += '.'
    s = s.rstrip('0')
    t = len(s) - s.find('.') - 1
    a = int(s.replace('.', ''))
    if a == 0:
        return (0, 0)
    x, y = -t, -t
    while a % 5 == 0:
        x += 1
        a //= 5
    while a % 2 == 0:
        y += 1
        a //= 2
    return (x, y)


N, *A = open(0).read().split()
N = int(N)

d = {}
for a in A:
    t = conv(a)
    d.setdefault(t, 0)
    d[t] += 1

result = 0
xs = list(d.keys())
for i in range(len(xs)):
    x, y = xs[i]
    t = d[xs[i]]
    if x >= 0 and y >= 0:
        result += t * (t - 1) // 2
    for j in range(i + 1, len(xs)):
        m, n = xs[j]
        if x + m >= 0 and y + n >= 0:
            result += t * d[xs[j]]
print(result)
### BUGGY CODE ###

S = list("x"+input()+"xx")
N = len(S)

ans = 0
b = 0
while b<N:
    if S[b]=="A" and S[b+1]=="B" and S[b+2]=="C":
        S[b]="B"
        S[b+1]="C"
        S[b+2]="A"
        b-=2
        ans+=1
    b+=1
print(ans)

### FIXED CODE ###

S = input()
N = len(S)
X = []
x = 0
while x<N-1:
    if S[x]=="B" and S[x+1]=="C":
        X.append("D")
        x+=1
    else:
        X.append(S[x])
    x+=1
ans = 0
N = len(X)
a = 0
for i in range(N):
    if X[i]=="A":
        a+=1
    elif X[i]=="D":
        ans+=a
    else:
        a=0
print(ans)
### BUGGY CODE ###

N = int(input())
list = list(map(int, input().split()))
no = 0 
ans = 1
for i in range(N):
  ans = ans * list[no]
  no += 1
print(ans if ans <= 10**18 else "-1")

### FIXED CODE ###

def resolve():
    N = int(input())
    A = list(map(int, input().split()))
    ans = 1
    if 0 in A:
        print(0)
        exit()
    for i in A:
        ans *= i
        if ans > 10**18:
            print(-1)
            exit()
    print(ans)
resolve()
### BUGGY CODE ###

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

ans = N

for i in range(N):
    j = 0
    while True:
        if j == N or A[j] > A[i]:break
        if i != j and A[i] % A[j] == 0:
            ans -= 1
            break
        j += 1

print(ans)


### FIXED CODE ###

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

M = 10**6 + 1

cnt = [0] * M

for a in A:
    if cnt[a] != 0:
        cnt[a] += 1
        continue
    for b in range(a, M, a):
        cnt[b] += 1

ans = 0
for a in A:
    if cnt[a] == 1:ans += 1

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

from collections import deque
h,w = list(map(int,input().split()))
f = []
q = deque()
for i in range(h):
    a = list(input())
    for j in range(w):
        if a[j] == '#':
            q.append([0,i,j])
    f.append(a)

ans =0
dxy = [0,1,0,-1,0]
while(len(q)):
    c,y,x = q.popleft()
    for i in range(4):
        ny = y+dxy[i]
        nx = x+dxy[i+1]
        if nx >= w or ny >= h or nx <0 or ny <0:
            continue
        if f[ny][nx] == '.':
            f[ny][nx] = c+1
            q.append([c+1,ny,nx])
            ans = max(ans,c+1)
        elif f[ny][nx] != '#' and f[ny][nx] > c+1:
            f[ny][nx] = c+1
            q.append([c+1,ny,nx])
            ans = max(ans,c+1)

print(ans)


### FIXED CODE ###

from collections import deque
h,w = list(map(int,input().split()))
f = []
q = deque()
for i in range(h):
    a = list(input())
    for j in range(w):
        if a[j] == '#':
            q.append([0,i,j])
    f.append(a)

ans =0
dxy = [0,1,0,-1,0]
while(len(q)):
    c,y,x = q.popleft()
    for i in range(4):
        ny = y+dxy[i]
        nx = x+dxy[i+1]
        if nx >= w or ny >= h or nx <0 or ny <0:
            continue
        if f[ny][nx] == '.':
            f[ny][nx] = c+1
            q.append([c+1,ny,nx])
            ans = max(ans,c+1)
        elif f[ny][nx] != '#' and f[ny][nx] > c+1:
            f[ny][nx] = c+1
            q.append([c+1,ny,nx])
            ans = max(ans,c+1)

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

n = int(input())
# for i in range(n):
#     m = int(input())
#     k = k*m
op = 1
p = list(map(int,input().split()))
p.sort()
for i in p:
    op = op*i

if op > 10**18:
    print(-1)
else:
    print(op)

### FIXED CODE ###

n = int(input())
# for i in range(n):
#     m = int(input())
#     k = k*m
op = 1
p = list(map(int,input().split()))
p.sort()
for i in p:
    op = op*i

    if op > 10**18:
        print(-1)
        exit(0)

print(op)
### BUGGY CODE ###

import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, m = na()
li = na()
list.sort(li)
ls = []
for i in range(len(li)-1):
    ls.append(li[i+1]-li[i])
if len(ls) < n - 1:
    print(0)
else:
    for j in range(n - 1):
        ls.remove(max(ls))
    print(sum(ls))

### FIXED CODE ###

import sys

stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()  # ignore trailing spaces

n, m = na()
li = na()
ls = []
list.sort(li)
for i in range(len(li) - 1):
    ls.append(li[i + 1] - li[i])
ls = sorted(ls, reverse=True)
print(sum(ls[n-1:]))
### BUGGY CODE ###

class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n

    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        if self.parents[x] > self.parents[y]:
            x, y = y, x

        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return len(self.roots())

    def all_group_members(self):
        return {r: self.members(r) for r in self.roots()}

    def __str__(self):
        return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots())


n,m=map(int, input().split())
uf = UnionFind(n)
for i in range(m):
    a,b = map(int, input().split())
    uf.union(a-1,b-1)
a=uf.all_group_members()
ans=0
for v in a.values():
    ans=max(ans,len(v))
print(ans)

### FIXED CODE ###

class UnionFind():
    def __init__(self, n):
        self.n = n
        self.parents = [-1] * n

    def find(self, x):
        if self.parents[x] < 0:
            return x
        else:
            self.parents[x] = self.find(self.parents[x])
            return self.parents[x]

    def union(self, x, y):
        x = self.find(x)
        y = self.find(y)

        if x == y:
            return

        if self.parents[x] > self.parents[y]:
            x, y = y, x

        self.parents[x] += self.parents[y]
        self.parents[y] = x

    def size(self, x):
        return -self.parents[self.find(x)]

    def same(self, x, y):
        return self.find(x) == self.find(y)

    def members(self, x):
        root = self.find(x)
        return [i for i in range(self.n) if self.find(i) == root]

    def roots(self):
        return [i for i, x in enumerate(self.parents) if x < 0]

    def group_count(self):
        return len(self.roots())

    def all_group_members(self):
        return {r: self.members(r) for r in self.roots()}

    def __str__(self):
        return '\n'.join('{}: {}'.format(r, self.members(r)) for r in self.roots())

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

for i in range(m):
    a,b=map(int,input().split())
    uf.union(a-1,b-1)

ans=0
for i in range(n):
    ans=max(ans, uf.size(i))
print(ans)
### BUGGY CODE ###

import io,sys
sys.setrecursionlimit(10**6)

def main():
    import bisect
    n = int(input())
    A = list(map(int,sys.stdin.readline().rstrip().split()))
    A.sort()

    ans = 0
    a_max = A[-1]
    note = [True]*n
    for i in range(n):
        if note[i]:
            a = A[i]
            if i != n-1 and a==A[i+1]:
                ans-=1
            ans +=1
            for j in range(i,n):
                if A[j]%a==0:
                    note[j]=False
       
    
    print(ans)
main()

### FIXED CODE ###

import io,sys
sys.setrecursionlimit(10**6)

def main():
    import bisect
    n = int(input())
    A = list(map(int,sys.stdin.readline().rstrip().split()))
    A.sort()

    ans = 0
    a_max = A[-1]
    note = [True]*(a_max+1)
    for j in range(n):
        a = A[j]
        if note[a]:
            if j != n-1 and A[j]==A[j+1]:
                ans-=1
            ans+=1
            # for i in range(a,a_max+1):
            #     if i%a==0:
            #         note[i] = False
            temp = a 
            while temp <= a_max:
                note[temp]=False
                temp+=a

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

n, k = map(int, input().split())
li_p = list(map(int, input().split()))
def kitaichi(a):
  b = 0
  for i in range(1, a+1):
    b += i
  return b/a
li_s = []
for x in li_p:
  li_s.append(kitaichi(x))
ans = []
for i in range(n-k+1):
  c = 0
  for j in range(i, i+k):
    c += li_s[j]
    ans.append(c)
print(max(ans))

### FIXED CODE ###

n, k = map(int, input().split())
li_p = list(map(int, input().split()))
def kitaichi(a):
  b = 0
  for i in range(1, a+1):
    b += i
  return b/a
li_s = []
for x in li_p:
  li_s.append(kitaichi(x))
ans = []
d = 0
for i in range(k):
  d += li_s[i]
  ans.append(d)
for j in range(k, n):
  d += li_s[j]
  d -= li_s[j-k]
  ans.append(d)
print(max(ans))
### BUGGY CODE ###

import sys
import numpy as np
import math
import collections
import copy
from collections import deque 
from functools import reduce
from itertools import product

# input = sys.stdin.readline

def ff(N):
#     print("call ff{0}".format(N))
    if N > 100:
        n = int(np.sqrt(20))+5
    else:
        n = N
    cnt = 0
    for x in range(1, n+1):
        x2 = x**2
        for y in range(1, n+1):
            y2 = y**2
            xy = x * y
            tt = x2 + y2 + xy
            if tt > N:
                break
            for z in range(1, n+1):
                num = tt + z**2 + x*z + y*z
                if N == num:
                    cnt += 1
                elif N < num:
                    break
    return(cnt)    
    
N = int(input())    
n = int(np.sqrt(20))+1
for i in range(1, N+1):
#     ff(i)
     print(ff(i))













### FIXED CODE ###

import sys
import numpy as np
import math
import collections
import copy
from collections import deque 
from functools import reduce
from itertools import product

# input = sys.stdin.readline

N = int(input())
n_np = np.zeros(105**3)
for i in range(1, 105):
    for j in range(1, 105):
        for k in range(1, 105):
            idx = i**2 + j**2 + k **2 + i*j + i*k + j*k
            n_np[idx-1] += 1
for i in range(N):
    print(int(n_np[i]))
### BUGGY CODE ###

import itertools

N = int(input())
L = sorted(list(map(int, input().split())))

ans = 0
for x in itertools.combinations(L,3):
  if x[0] + x[1] >  x[2]:
    ans += 1
print (ans)

### FIXED CODE ###

import bisect
N = int(input())
L = sorted(list(map(int, input().split())))

ans = 0
for i in range(N-1,1,-1):
  for j in range(i-1,0,-1):
    t = bisect.bisect(L, L[i]-L[j])
    if j-t>0: ans+=j-t
print (ans)
### BUGGY CODE ###

from fractions import gcd
n, m = map(int, input().split())
s = input()
t = input()
g = n * m // gcd(n, m)
gc = gcd(n, m)
l = ["" for i in range(g)]
for i in range(0, g, g // n):
    l[i] = s[i * gc // m]
for i in range(0, g, g // m):
    if l[i] != "":
        if l[i] != t[i * gc // n]:
            print(-1)
            exit()
print(g)

### FIXED CODE ###

from fractions import gcd
n, m = map(int, input().split())
s = input()
t = input()
gcm = gcd(n, m)
lcm = n * m // gcm
for i in range(gcm):
    if s[(n // gcm) * i] != t[(m // gcm) * i]:
        print(-1)
        exit()
print(lcm)
### BUGGY CODE ###

def main():
    import sys
    input = sys.stdin.readline

    H, W, M = map(int, input().split())

    H_list = [[0, i] for i in range(H + 1)] 
    W_list = [[0, i] for i in range(W + 1)] 


    S = set()
    S_add = S.add
    INF = 10 ** 6

    for _ in range(M):
        a, b = map(int, input().split())
        tmp = INF * a + b
        S_add(tmp)
        H_list[a][0] += 1
        W_list[b][0] += 1

    ans = 0
    H_list.sort(reverse=True)
    W_list.sort(reverse=True)

    tmp_H = H_list[0][0]
    tmp_W = W_list[0][0]
    tmp_ans = tmp_H + tmp_W

    for h in range(H):
        if H_list[h][0] + 1 < tmp_H:
            continue
        h_ = H_list[h][1]
        H_ = H_list[h][0]
        for w in range(W):
            if W_list[w][0] + 1 < tmp_W:
                break
            w_ = W_list[w][1]
            tmp = H_ + W_list[w][0]
            if INF * h_ + w_ in S:
                tmp -= 1
            ans = max(ans, tmp)
            if ans == tmp_ans:
                print (ans)
                return

    print (ans)

if __name__ == '__main__':
    main()

### FIXED CODE ###

def main():
    import sys
    input = sys.stdin.readline

    H, W, M = map(int, input().split())

    H_list = [[0, i] for i in range(H + 1)] 
    W_list = [[0, i] for i in range(W + 1)] 


    S = set()
    S_add = S.add
    INF = 10 ** 6

    for _ in range(M):
        a, b = map(int, input().split())
        tmp = INF * a + b
        S_add(tmp)
        H_list[a][0] += 1
        W_list[b][0] += 1

    ans = 0
    H_list.sort(reverse=True)
    W_list.sort(reverse=True)

    tmp_H = H_list[0][0]
    tmp_W = W_list[0][0]
    tmp_ans = tmp_H + tmp_W

    for h in range(H):
        if H_list[h][0] + 1 < tmp_H:
            continue
        h_ = H_list[h][1]
        H_ = H_list[h][0]
        for w in range(W):
            if W_list[w][0] + H_ + 1 < tmp_ans:
                break
            w_ = W_list[w][1]
            tmp = H_ + W_list[w][0]
            if INF * h_ + w_ in S:
                tmp -= 1
            ans = max(ans, tmp)
            if ans == tmp_ans:
                print (ans)
                return

    print (ans)

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

from copy import deepcopy
N = int(input())
A = [int(i) for i in input().split()]
B = deepcopy(A)
num = sum(A)
for i in B:
    A.append(i)
ans = []
if N%4 == 1:
    for i in range(N):
        a = 0
        for j in range(int(N/2)):
            a += 2*A[2+2*j+i]
        ans.append(num-a)
    b = [ans[-1]] + ans[:-1]
else:
    for i in range(N):
        a = 0
        for j in range(int(N/2)):
            a += 2*A[1+2*j+i]
        ans.append(num-a)
    b = ans
print(*b)


### FIXED CODE ###

N = int(input())
A = [int(i) for i in input().split()]
num = sum(A)
ans = []
a = 0
for j in range(int(N/2)):
    a += 2*A[1+2*j]
ans.append(num-a)
a = num-a
for i in range(N-1):
    a = 2*A[i] - a
    ans.append(a)
print(*ans)
### BUGGY CODE ###

from collections import deque
_in = list(open(0))
h, w = list(map(int, _in[0].split()))

s = deque()
for i, y in enumerate(_in[1:]):
    for j, x in enumerate(y):
        if x == '#':
            s.append((i,j,0))

a = [[-1]*w for _ in range(h)]

while s:
    q = s.popleft()
    if a[q[0]][q[1]] != -1:
        continue
    
    a[q[0]][q[1]] = q[2]
    ans = q[2]
    
    if q[0]>0:
        s.append((q[0]-1, q[1], q[2]+1))
    if q[0]<h-1:
        s.append((q[0]+1, q[1], q[2]+1))
    if q[1]>0:
        s.append((q[0], q[1]-1, q[2]+1))
    if q[1]<w-1:
        s.append((q[0], q[1]+1, q[2]+1))
        
print(ans)

### FIXED CODE ###

def main():
    H, W = map(int, input().split())
    m = []
    m.append([True] * (W + 2))
    for _ in range(H):
        m.append([True] + [c == '#' for c in input()] + [True])
    m.append([True] * (W + 2))
    queue = []
    for i in range(1, H + 1):
        for j in range(1, W + 1):
            if m[i][j]:
                queue.append((i, j))
    ans = -1
    while queue:
        ans += 1
        tmp = []
        for x, y in queue:
            if not m[x - 1][y]:
                m[x - 1][y] = True
                tmp.append((x - 1, y))
            if not m[x + 1][y]:
                m[x + 1][y] = True
                tmp.append((x + 1, y))
            if not m[x][y - 1]:
                m[x][y - 1] = True
                tmp.append((x, y - 1))
            if not m[x][y + 1]:
                m[x][y + 1] = True
                tmp.append((x, y + 1))
        queue = tmp
    print(ans)

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

from collections import deque

def solve(s):
    que = deque()
    que.append(s)
    while len(que) > 0:
        top = que.pop()
        if top == '':
            return 'YES'

        if top[:5] == 'dream':
            if top[5:7] == 'er':
                que.append(top[:7])
            que.append(top[:5])
        elif top[:5] == 'erase':
            if len(top) > 5 and top[5] == 'r':
                que.append(top[:6])
            else:
                que.append(top[:5])
    return 'NO'

print(solve(input()))


### FIXED CODE ###

from collections import deque

def solve(s):
    stack = deque()
    stack.append(s)
    while len(stack) > 0:
        top = stack.pop()
        if top == '':
            return 'YES'

        if top[:5] == 'dream':
            if top[5:7] == 'er':
                stack.append(top[7:])
            stack.append(top[5:])
        elif top[:5] == 'erase':
            if len(top) > 5 and top[5] == 'r':
                stack.append(top[6:])
            else:
                stack.append(top[5:])
    return 'NO'

print(solve(input()))
### BUGGY CODE ###

words = ['dream', 'dreamer', 'erase', 'eraser']
S = input()
T = []
for a in S[::-1]:
  T += a
  for s in words:
    if ''.join(T)[::-1] == s:
      T = []
print('YES' if T == [] else 'NO')

### FIXED CODE ###

words = ['maerd', 'remaerd', 'esare', 'resare']
S = input()
T = ''
for a in S[::-1]:
  T += a
  for s in words:
    if T == s:
      T = ''
print('YES' if T == '' else 'NO')
### BUGGY CODE ###

def get_survivors(n, pairs):
    survivors = {v: {v} for v in range(n)}
    for x, y in reversed(pairs):
        for v, srv in survivors.copy().items():
            if x in srv:
                if y in srv:
                    del survivors[v]
                else:
                    srv.add(y)
            elif y in srv:
                srv.add(x)
    return list(survivors.values())


def solve(n, pairs):
    survivors = get_survivors(n, pairs)
    ans = 0

    for i, su in enumerate(survivors):
        for sv in survivors[i + 1:]:
            if su.isdisjoint(sv):
                ans += 1
    return ans


n, m = map(int, input().split())
pairs = []
for _ in range(m):
    x, y = map(int, input().split())
    x -= 1
    y -= 1
    pairs.append((x, y))
print(solve(n, pairs))


### FIXED CODE ###

def get_survivors(n, pairs):
    survivors = {v: {v} for v in range(n)}
    for x, y in reversed(pairs):
        for v, srv in survivors.copy().items():
            if x in srv:
                if y in srv:
                    del survivors[v]
                else:
                    srv.add(y)
            elif y in srv:
                srv.add(x)
    return survivors


def solve(n, pairs):
    survivors = get_survivors(n, pairs)
    ans = 0
    for u, su in survivors.items():
        for v, sv in survivors.items():
            if u >= v:
                continue
            if su.isdisjoint(sv):
                ans += 1
    return ans


n, m = map(int, input().split())
pairs = []
for _ in range(m):
    x, y = map(int, input().split())
    x -= 1
    y -= 1
    pairs.append((x, y))
print(solve(n, pairs))
### BUGGY CODE ###

import sys
input = sys.stdin.readline

a, b, k = map(int, input().split())
arr = sorted([i for i in range(a, b+1)])
arr_slice = set(arr[:k] + arr[-k:])
[print(i) for i in sorted(arr_slice)]

### FIXED CODE ###

import sys
input = sys.stdin.readline

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

pre_arr = [i for i in range(a, min(a+k, b+1))]
back_arr = [i for i in range(max(b-k+1, a), b+1)]
arr_slice = set(pre_arr) | set(back_arr)
[print(i) for i in sorted(arr_slice)]
### BUGGY CODE ###

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

i_ok_count=0
break_flag=0
for i in range(len(List)):
  for j in range(i):
    if List[i]>List[j]:
      break_flag=1
      break
  if break_flag==1:
    break_flag=0
    continue
  i_ok_count+=1
  break_flag=0

print(i_ok_count)

### FIXED CODE ###

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

counter=0
mj=N
for i in range(N):
  if mj>List[i]:
    mj=List[i]
  if List[i]==mj:
    counter+=1
print(counter)
### BUGGY CODE ###

s = input() #sys.stdin.readlineは最後が改行
n =len(s)

from collections import defaultdict
amari = defaultdict(lambda:0)
amari[0]=1

for i in range(n):
    num = int(s[-1-i:])
    tmp = num%2019
    amari[tmp]+=1
    

from operator import mul
from functools import reduce

def cmb(n,r):
    r = min(n-r,r)
    if r == 0: return 1
    over = reduce(mul, range(n, n - r, -1))
    under = reduce(mul, range(1,r + 1))
    return over // under


ans = 0
for key,val in amari.items():
    if val>1:
        ans +=cmb(val,2)

print(ans)


### FIXED CODE ###

s = input() #sys.stdin.readlineは最後が改行
n =len(s)

from collections import defaultdict
amari = defaultdict(lambda:0)
amari[0]=1
num=0
tmp=0
ans =0

for i in range(n):
    num = tmp + int(s[-1-i])*pow(10,i,2019)
    tmp = num%2019
    amari[tmp]+=1

    if amari[tmp]>1:
        val = amari[tmp]
        ans -= (val-1)*(val-2)//2
        ans += (val)*(val-1)//2

print(ans)