Harryxun/stf_run huggingface dataset:
from operator import itemgetter
from queue import deque

N = int(input())

x_in = []
y_in = []

for _ in range(N):
    x, y = list(map(int, input().split(" ")))
    x_in.append(x)
    y_in.append(y)

x_in = sorted(list(enumerate(x_in)), key=itemgetter(1))
y_in = sorted(list(enumerate(y_in)), key=itemgetter(1))

xd = []
yd = []

for i in range(N-1):
    xd.append((x_in[i+1][1]-x_in[i][1], (x_in[i][0], x_in[i+1][0])))
    yd.append((y_in[i+1][1]-y_in[i][1], (y_in[i][0], y_in[i+1][0])))
    
xdq = deque(sorted(xd))
ydq = deque(sorted(yd))

par = list(range(N))

def find(x):
    if x == par[x]:
        return x
    else:
        par[x] = find(par[x])
        return par[x]
    
def union(x, y):
    px, py = find(x), find(y)
    if px != py:
        par[px] = py
        
ans = 0

while xdq or ydq:
    if xdq and (not ydq or xdq[0] < ydq[0]):
        d, (i, j) = xdq.popleft()
    else:
        d, (i, j) = ydq.popleft()
        
    if find(i) != find(j):
        ans += d
        union(i, j)
        
print(ans)

### FIXED CODE ###

from operator import itemgetter
from queue import deque

N = int(input())

xin = []
yin = []

for _ in range(N):
    x, y = map(int, input().split())
    xin.append(x)
    yin.append(y)
    
xin = sorted(list(enumerate(xin)), key=itemgetter(1))
yin = sorted(list(enumerate(yin)), key=itemgetter(1))

xd = []
yd = []

for i in range(N-1):
    xd.append((xin[i+1][1] - xin[i][1], (xin[i][0], xin[i+1][0])))
    yd.append((yin[i+1][1] - yin[i][1], (yin[i][0], yin[i+1][0])))
    
xdq = deque(sorted(xd))
ydq = deque(sorted(yd))

par = list(range(N))

def find(x):
    if x == par[x]:
        return x
    else:
        par[x] = find(par[x])
        return par[x]
    
    
def union(x, y):
    px, py = find(x), find(y)
    if px != py:
        par[py] = px
    
ans = 0

while xdq or ydq:
    if xdq and (not ydq or xdq[0] < ydq[0]):
        d, (i, j) = xdq.popleft()
    else:
        d, (i, j) = ydq.popleft()
        
    if find(i) != find(j):
        ans += d
        union(i, j)
        
print(ans)
n,l=map(int,open(0).read().split())
sum_n=sum(l)
for i in range(n):
  if 2*l[i]>=sum_n
  	print('No')
    import sys
    sys.exit()
print('Yes')

### FIXED CODE ###

n,*l=map(int,open(0).read().split())
sum_n=sum(l)
for i in range(n):
	if 2*l[i]>=sum_n:
		print('No')
		import sys
		sys.exit()
print('Yes')
N = int(input())
S = list(input())
K = int(input())

for i in range(N):
  if S[i] != S[K-1]:
    S[i] = "*"
S_changed = "".join(S)
print(S_changed)

### FIXED CODE ###

a,b,c = map(int,input().split())
if a > b:
	A = a
	a = b
	b = A

yoru = 1    
if a < c and b > c:
	yoru = 1
else:
	yoru = 0
if yoru == 1:
	print("Yes")
else:
	print("No")
n=int(input())
t=input()
ans=t[0]
for i in range(1,n):
    if ans[-1]==i:
        pass
    else:
        ans=ans+i
print(ans)


### FIXED CODE ###

n=int(input())
t=input()
ans=t[0]
for i in range(1,n):
    if ans[-1]==t[i]:
        pass
    else:
        ans=ans+t[i]
print(len(ans))
N = int(input())
A = list(map(int, input().split()))

que = 0
list_plus = False
list_minus = False
que_list = []

for i in A:
    if que == 0:
        que = i
        que_list.append(i)
    elif que < i:
        list_plus = True
        que = i
        que_list.append(i)
    elif que > i:
        list_minus = True
        que = i
        que_list.append(i)

    if list_plus:
        if list_minus:
            len = len(que_list) - 1
            break
    else:
        if list_plus:
            len = len(que_list) - 1
            break

s = N // len
a = N % len

print(s + a)


### FIXED CODE ###

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

state_plus = False
state_minus = False
state_flat = True
count = 0

for i in range(N-1):
    # print(str(A[i]) + ',' + str(A[i + 1]))
    if state_flat:
        if A[i + 1] > A[i]:
            state_flat = False
            state_plus = True
        elif A[i + 1] < A[i]:
            state_flat = False
            state_minus = True
    elif state_plus:
        if A[i] > A[i + 1]:
            state_plus = False
            state_flat = True
            count += 1
    elif state_minus:
        if A[i] < A[i + 1]:
            state_minus = False
            state_flat = True
            count += 1
    # print(count)

print(count + 1)
# -*- coding: utf-8 -*-
import numpy as np

H, W = map(int, input().split())
S = [input() for x in range(H)]

L = np.zeros([H, W], dtype=int)
R = np.zeros([H, W], dtype=int)
U = np.zeros([H, W], dtype=int)
D = np.zeros([H, W], dtype=int)

S_ = np.zeros([H, W], dtype=int)
for h in range(H):
    for w in range(W):
        if S[h][w] == '#': S_[h, w] = 0
        else: S_[h, w] = 1
L[:, 0] = S_[:, 0]
for w in range(1, W):
    L[:, w] = (L[:, w-1] + 1) * S_[:, w]
R[:, W-1] = S_[:, W-1]
for w in range(W-2, -1, -1):
    R[:, w] = (R[:, w+1] + 1) * S_[:, w]
U[0] = S_[0]
for h in range(1, H):
    U[h] = (U[h-1] + 1) * S_[h]
D[H-1] = S_[H-1]
for h in range(H-2, -1, -1):
    D[h] = (D[h+1] + 1) * S_[h]

L = np.array(L)
R = np.array(R)
U = np.array(U)
D = np.array(D)
print(np.max(L+R+U+D)-3)

### FIXED CODE ###

# -*- coding: utf-8 -*-
import numpy as np

H, W = map(int, input().split())
S = [input() for x in range(H)]

L = np.zeros([H, W], dtype=int)
R = np.zeros([H, W], dtype=int)
U = np.zeros([H, W], dtype=int)
D = np.zeros([H, W], dtype=int)

S_ = np.zeros([H, W], dtype=int)
for h in range(H):
    for w in range(W):
        if S[h][w] == '#': S_[h, w] = 0
        else: S_[h, w] = 1
L[:, 0] = S_[:, 0]
for w in range(1, W):
    L[:, w] = (L[:, w-1] + 1) * S_[:, w]
R[:, W-1] = S_[:, W-1]
for w in range(W-2, -1, -1):
    R[:, w] = (R[:, w+1] + 1) * S_[:, w]
U[0] = S_[0]
for h in range(1, H):
    U[h] = (U[h-1] + 1) * S_[h]
D[H-1] = S_[H-1]
for h in range(H-2, -1, -1):
    D[h] = (D[h+1] + 1) * S_[h]

L = np.array(L)
R = np.array(R)
U = np.array(U)
D = np.array(D)
print(np.max(L+R+U+D)-3)
i = 1
while True:
     x = int(input())
     if x == 0 break:
     print('Case {}: {}'.format(i, x))
     i += 1

### FIXED CODE ###

i = 1
while True:
     x = int(input())
     if x == 0: break
     print('Case {}: {}'.format(i, x))
     i += 1
import math
N = int(input())
X = list(map(int,input().split()))
P = math.ceil(sum(X)/N)
P1 = P - 1
hp = 0

for x in X:
  hp_x = (P-x)**2
  hp2_x = (P1 - x)**2
  hp = hp + hp_x
  hp2 = hp2 + hp2_x
print(min(hp,hp2))

### FIXED CODE ###

import math
N = int(input())
X = list(map(int,input().split()))
P = math.ceil(sum(X)/N)
P1 = P - 1
hp = 0
hp2 = 0

for x in X:
  hp_x = (P-x)**2
  hp2_x = (P1 - x)**2
  hp = hp + hp_x
  hp2 = hp2 + hp2_x
print(min(hp,hp2))
s = input()
tem=str(s)
if tem>=30:
  print("Yes")
else:
  print("No")

### FIXED CODE ###

X = input()
tem = int(X)
if tem>=30:
  print("Yes")
else:
  print("No")
import itertools
N = int(input())
A = [int(_) for _ in input().split()]
gcd = lambda x, y: gcd(y, x % y) if x % y else y
G = list(itertools.accumulate(A, func=gcd))
g = G[-1]
if G[0] == g:
    ans = list(itertools.accumulate(A[1:], func=gcd))[-1]
else:
    for i in range(1, N - 1):
        if G[i] == g:
            ans = max(
                gcd(G[i - 1],
                    list(itertools.accumulate(A[i + 1:], func=gcd))[-1]),
                G[-2])
            break
print(ans)


### FIXED CODE ###

import itertools
N = int(input())
A = [int(_) for _ in input().split()]
gcd = lambda x, y: gcd(y, x % y) if x % y else y
L = list(itertools.accumulate(A, func=gcd))
R = list(itertools.accumulate(A[::-1], func=gcd))[::-1]
ans = max(R[1], L[-2])
for i in range(1, N - 1):
    ans = max(ans, gcd(L[i - 1], R[i + 1]))
print(ans)
# https://img.atcoder.jp/abc125/editorial.pdf
def solve(a):
    n = len(a)
    cost = [[0 for i in range(n)] for j in range(n)]
 
    for length in range(2, n+1):
        for i in range(0, n-length+1):
            k = i+length-1
            def f(i,j,k):
                return cost[i][j-1]+cost[j][k]+M[i][0]*M[j-1][1]*M[k][1]
            cost[i][k] = min([f(i,j,k) for j in range(i+1,k+1)])
    return cost[0][n-1]
 
n = raw_input()
M = []
for i in range(n):
    M.append(map(int, raw_input().split()))
print solve(M)

### FIXED CODE ###

def solve(a):
 n = len(a)
 cost = [[0 for i in range(n)] for j in range(n)]
 for length in range(2, n+1):
  for i in range(0, n-length+1):
   k = i+length-1
   def f(i,j,k):
    return cost[i][j-1]+cost[j][k]+M[i][0]*M[j-1][1]*M[k][1]
   cost[i][k] = min([f(i,j,k) for j in range(i+1,k+1)])
 return cost[0][n-1]
n = input()
M = []
for i in range(n):
 M.append(map(int, raw_input().split()))
print solve(M)
W = input()

T = []
while True:
	R = input().lower()
	if R == "END_OF_TEXT":
		break
	T.append(R)

T = ''.join(T)
print(T.count(W))

### FIXED CODE ###

W = input().lower()

T = []
while True:
	R = input()
	if R == "END_OF_TEXT":
		break
	R = R + " "
	T.append(R)

T = (''.join(T)).lower()
T = T.split()
print(T.count(W))
import math
 
def floatinput():
    a = input().split()
    for i in range(len(a)):
        a[i] = float(a[i])
    return a
    
def main():
    a = numinput()
    x1 = a[0]; y1 = a[1]; x2 = a[2]; y2 = a[3]
    print(math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2))
    
if __name__ == "__main__":
    main()


### FIXED CODE ###

# AOJ ITP1_10_A

import math

def floatinput():
    a = input().split()
    for i in range(len(a)):
        a[i] = float(a[i])
    return a

def main():
    data = floatinput()
    x1 = data[0]; y1 = data[1]; x2 = data[2]; y2 = data[3]
    print(math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2))

if __name__ == "__main__":
    main()
n=[input() for i in range(int(input()))]
m=[input() for i in range(int(input()))]
l=list(set(n))
print(max(0,max(n.count(l[i])-m.count(l[i])) for i in range(len(l))))

### FIXED CODE ###

n=[input() for i in range(int(input()))]
m=[input() for i in range(int(input()))]
l=list(set(n))
print(max(0,max(n.count(l[i])-m.count(l[i]) for i in range(len(l)))))
S=int(input()) 
T=int(input())
print(T+S)

### FIXED CODE ###

a,b=input().split()
print(b+a)
r1,c1,r2,c2 = map(int, input().split())

def nCr_mod_p(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
N = 2*10 ** 6   # N は必要分だけ用意する
fact = [1, 1]  # fact[n] = (n! mod p), 0! = 1! = 1
factinv = [1, 1]  # factinv[n] = ((n!)^(-1) mod p), 0! = 1! = 1
inv = [0, 1]  # inv[n] = n^(-1) mod p, 0! = 1　だけど便宜上inv[0]=0にしてる

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)

sum22 = nCr_mod_p(r2+1+c2+1,r2+1,p) - 1
sum21 = nCr_mod_p(r2+1+c1,r2+1,p) - 1
sum12 = nCr_mod_p(r1+c2+1,c2+1,p) - 1
sum11 = nCr_mod_p(r1+c1,c1,p) - 1

ans = sum22 - sum21 - sum12 + sum11
ans %= p

print(ans)

### FIXED CODE ###

r1,c1,r2,c2 = map(int, input().split())

def nCr_mod_p(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
N = 2*10 ** 6 + 10  # N は必要分だけ用意する
fact = [1, 1]  # fact[n] = (n! mod p), 0! = 1! = 1
factinv = [1, 1]  # factinv[n] = ((n!)^(-1) mod p), 0! = 1! = 1
inv = [0, 1]  # inv[n] = n^(-1) mod p, 0! = 1　だけど便宜上inv[0]=0にしてる

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)

sum22 = nCr_mod_p(r2+1+c2+1,r2+1,p) - 1
sum21 = nCr_mod_p(r2+1+c1,r2+1,p) - 1
sum12 = nCr_mod_p(r1+c2+1,c2+1,p) - 1
sum11 = nCr_mod_p(r1+c1,c1,p) - 1

ans = sum22 - sum21 - sum12 + sum11
ans %= p

print(ans)
s = int(input())

if s[0] == s[1]:
    if s[2] == s[3]:
        print("Yes")
    else:
        print("No")

if s[0] == s[2]:
    if s[1] == s[3]:
        print("Yes")
    else:
        print("No")

if s[0] == s[3]:
    if s[2] == s[1]:
        print("Yes")
    else:
        print("No")

### FIXED CODE ###

s = input()
s_list = list(s)
s_list.sort()

if s_list[0] == s_list[1] and s_list[2] == s_list[3] and s_list[0] != s_list[2]:
    print("Yes")
else:
    print("No")
A=list(input())
B=list(input())
C=list(input())
t='a'
d=1
while d==1:
    if t=='a' and A==[]:
        print('A')
        break
    elif t=='b' and B==[]:
        print('B')
        break
    elif t=='c' and C==[]:
        print('C')
        break
    if t=='a':
        t=A.pop(0)
    if t=='b':
        t=B.pop(0)
    if t=='c':
        t=C.pop(0)

### FIXED CODE ###

A=list(input())
B=list(input())
C=list(input())
t='a'
d=1#ずっとまわすつもり。
while d==1:
    if t=='a':
        t=A.pop(0)
    elif t=='b':
        t=B.pop(0)
    elif t=='c':
        t=C.pop(0)
    if t=='a' and A==[]:
        print('A')
        break
    elif t=='b' and B==[]:
        print('B')
        break
    elif t=='c' and C==[]:
        print('C')
        break
n = in(input())
if n ==1:
    print("Hello World")
else:
    a, b = map(int, input().split())
    print(a+b)

### FIXED CODE ###


n = int(input())
if n ==1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a+b)
n,k = map(int, input().split())
li = list(map(int, input().split()))
Li = list(n)
while len(set(Li)&set(li)):
  n += 1
  Li = list(n)
else: print("".join(Li))

### FIXED CODE ###

n,k = map(str, input().split())
li = list(map(str, input().split()))
Li = list(n)
while len(set(Li)&set(li)):
  n = int(n)+1
  Li = list(str(n))
else: print("".join(Li))
n = int(input())
a = list(map(int,input().split()))
a = sorted(a, reverse = True)
f = True
m = 0
hikaku = -1 
syutu = 0

while f or i <= n - 1:
    if a[0]//2 == a[i] or a[0]//2 == a[i] + 1:
        f = False
        m = a[i]
    else:
        i += 1

if f = True:
    for i in range(n):
        answer = 1
        syutu = a[i + 1]
        for j in range(1, a[0] + 1):
            answer *= j
        for j in range(1, m + 1):
            answer = int(answer / j)
        for j in range(1, a[0] - m + 1):
            answer = int (answer / j)
        if hikaku <= answer:
            hikaku = answer
            m = syutu
print(a[0], syutu)

        
        




### FIXED CODE ###

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

a = sorted(a, reverse = True)
mid = a[0]//2
diff = abs(mid - a[0])

if n == 2:
    print(max(a[0],a[1]),min(a[0],a[1]))
else:
    for i in range(n):
        if abs(a[i] - mid) < diff:
            diff = abs(a[i] - mid)
            ans = i
    print(a[0], a[ans])
N = int(input())

def F(x):
  if x < 10:
    return x
  return x%10 + F(x//10)

answer = 'YES' if x%F(x) == 0 else 'NO'
print(answer)

### FIXED CODE ###

N = int(input())

def F(x):
  if x < 10:
    return x
  return x%10 + F(x//10)

answer = 'Yes' if N%F(N) == 0 else 'No'
print(answer)
a, b = map(int, input().split())
result = 0
while result * (a - 1) + 1 > b:
  result ++
print(str(result))

### FIXED CODE ###

a, b = map(int, input().split())
result = 0
while result * (a - 1) + 1 < b:
  result = result + 1
print(str(result))
N = int(input())
*a, = map(int, input().split())
b = [0]*(N+1)
for i in range(N):
    b[a[i]] += 1
ans = 0
for i in range(1, N+1):
    if i > b[i]:
        ans += b[i]
    elif i < b[i]:
        ans += b[i]-i
print(ans)


### FIXED CODE ###

from collections import defaultdict
N = int(input())
*a, = map(int, input().split())
b = defaultdict(int)
for i in range(N):
    b[a[i]] += 1
ans = 0
for i, v in b.items():
    if i > b[i]:
        ans += b[i]
    elif i < b[i]:
        ans += b[i]-i
print(ans)
s = input()
if(s[2]==s[3]):
  if(s[4]==s[5]):
    print('Yes')
    return None
print('No')

### FIXED CODE ###

s = input()
if(s[2]==s[3]):
  if(s[4]==s[5]):
    print('Yes')
  else:
    print('No')
else:
  print('No')
n = int(input())
 
a = [i**5 for i in range(120)]
for i in range(119):
    for j in range(i+1,119):
        if a[j]-a[i] == n:
            print(j,i)
            break
        if a[j]+a[i] == n:
            print(j,-i)
            break
    else: continue
    break


### FIXED CODE ###

print("ABC" if input() == "ARC" else "ARC")
N,A,B = map(int,input().split())
s = 0
for i in range(1,N+1):
  j = i
  x0 = j // 10000
  j -= x * 10000
  x1 = j // 1000
  j -= x * 10000
  x2 = j // 100
  j -= x * 10000
  x3 = j // 10
  j -= x * 10000
  x4 = j
  if A <= x0 + x1 + x2 + x3 + x4 and B >= x0 + x1 + x2 + x3 + x4:
    s += i
print(s)

### FIXED CODE ###

N,A,B = map(int,input().split())
s = 0
j = 0
for i in range(1,N+1):
  j = i
  x0 = j // 10000
  j -= x0 * 10000
  x1 = j // 1000
  j -= x1 * 1000
  x2 = j // 100
  j -= x2 * 100
  x3 = j // 10
  j -= x3 * 10
  x4 = j
  if (A <= x0 + x1 + x2 + x3 + x4 and B >= x0 + x1 + x2 + x3 + x4):
    s += i
print(s)
import bisect
n,a,b=map(int,input().split())
t=set([])
for i in range(n):
    t.add(int(input()))
t=list(t)
t.sort()
ai=bisect.bisect_left(t,a)
bi=bisect.bisect_left(t,b)
print(ans-(bi-ai))


### FIXED CODE ###

import bisect
n,a,b=map(int,input().split())
t=set([])
for i in range(n):
    t.add(int(input()))
t=list(t)
t.sort()
ai=bisect.bisect_left(t,a)
bi=bisect.bisect_left(t,b)
print(len(t)-(bi-ai))
N,A = map(int, input().split())
if N%500<= A:
    print("Yes")
else:
    print("No")

### FIXED CODE ###

N = int(input())
A = int(input())

if N%500 <= A:
    print("Yes")
else:
    print("No")
s = list(input())
print(s.count("1")

### FIXED CODE ###

s = input()
counter = 0
for val in s:
    if val=='1':
        counter +=1
print(counter)
n,m = map(int, input().split()) #n person, m pieces

counter = []
ans = 0
for i in range(m):
  counter.apeend(0)

for i in range(n):
  ls = [map(int, input().split())]
  for i in range(1, ls[0]+1):
    num = counter[ls[i] - 1]
    counter.insert(ls[i]-1, num + 1)
for i in range(m):
  if counter[i] == n:
    ans += 1
print(ans)



### FIXED CODE ###

n,m = map(int, input().split()) #n person, m pieces
 
counter = []
ans = 0
for i in range(m):
  counter.append(0)
 
for i in range(n):
  ls = list(map(int, input().split()))
  kazu = ls[0]
  for i in range(1, kazu+1):
    num = counter[ls[i] - 1]
    counter[ls[i]-1] = num + 1
for i in range(m):
  if counter[i] == n:
    ans += 1
print(ans)
from scipy.special import comb

N,M = map(int, input().split())

print(comb(M, 2, exact=True) + comb(N, 2, exact=True))


### FIXED CODE ###

N,M = map(int, input().split())

ans = 0
if N > 1:
    ans += int(N*(N-1)/2)
if M > 1:
    ans += int(M*(M-1)/2)
print(ans)
import math

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

def lcm(x, y):
    return (x * y) // math.gcd(x, y)

cd = lcm(c, d)

div_c = b // c - (a-1)//c
div_d = b // d - (a-1)//d
div_cd = b // cd - (a-1)//cd
count = b - a + 1 - div_c - div_d + div_cd
print(count)


### FIXED CODE ###



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


def gcd(a, b):
	while b:
		a, b = b, a % b
	return a

def lcm(x, y):
    return (x * y) // gcd(x, y)

cd = lcm(c, d)

div_c = b // c - (a-1)//c
div_d = b // d - (a-1)//d
div_cd = b // cd - (a-1)//cd
count = b - a + 1 - div_c - div_d + div_cd
print(count)
n,s=open(0);b=s.count("B");print("YNeos"[b>=n-b::2])

### FIXED CODE ###

n,s=open(0);b=s.count("B");print("YNeos"[b>=int(n)-b::2])
N , M = map(int ,input().split())
mod = 10 ** 9 + 7
A = []
for i in range(M):
    A.append(int(input()))
    if A[i] - 1 == A[i - 1] and i > 0:
        print("0")
        exit()
dp = [0] * (N + 1)
dp[0] = 1
idx = 0
crash = A[idx]
for i in range(1 , N + 1):
    if i == crash:
        idx += 1
        crash = A[idx]
        continue
    else:
        if i == 1:
            dp[1] = 1
        else:
            dp[i] = dp[i - 1] + dp[i - 2]
            dp[i] %= mod
print(dp[-1])


### FIXED CODE ###

N , M = map(int ,input().split())
mod = 10 ** 9 + 7
A = []
crash = 0
idx = 0
for i in range(M):
    A.append(int(input()))
    if i == 0:
        crash = A[0]
    if A[i] - 1 == A[i - 1] and i > 0:
        print("0")
        exit()
dp = [0] * (N + 1)
dp[0] = 1

for i in range(1 , N + 1):
    if i == crash:
        idx += 1
        if idx < M:
            crash = A[idx]
    else:
        if i == 1:
            dp[1] = 1
        else:
            dp[i] = dp[i - 1] + dp[i - 2]
            dp[i] %= mod
print(dp[-1])
n = int(input())
a = [int(input()) for _ in range(n)]

a = sorted(a):
tmp = 0
ans = 0
for i in a:
    if i == tmp:
        ans -= 1
        tmp = 0
    else:
        ans += 1
        tmp = i
print(ans)

### FIXED CODE ###

n = int(input())
a = [int(input()) for _ in range(n)]

a = sorted(a)
tmp = 0
ans = 0
for i in a:
    if i == tmp:
        ans -= 1
        tmp = 0
    else:
        ans += 1
        tmp = i

print(ans)
import math
A, B, H, M = = map(int, open(0).split())


arg_b = math.pi * float(M) / 30
arg_a = (math.pi / 6) * (float(H) + float(M)/60) 
K = abs(arg_b - arg_a)
C = math.sqrt(A*A+B*B - 2*A*B*math.cos(K))


### FIXED CODE ###

import math
A, B, H, M = map(int, input().split())


arg_b = math.pi * float(M) / 30
arg_a = (math.pi / 6) * (float(H) + float(M)/60) 
K = abs(arg_b - arg_a)
C = math.sqrt(A*A+B*B - 2*A*B*math.cos(K))
print(C)
n = int(input())
data = [int(input()) for k in range(n)]
for i in range(n):
	s = [data[t] for t in range(n)]
	s[i] = 0
	s.sort()
	print(s[-1])

### FIXED CODE ###

r = int(input())
print(r*r*3)
# dp[i日目][i-1日目にどれを選んだか] = i日目までの最大の幸福度
n = int(input())
a, b, c = [0 for _ in range(n)], [0 for _ in range(n)], [0 for _ in range(n)]
for i in range(n):
    a[i], b[i], c[i] = map(int, input().split())

dp = [[-1 for _ in range(3)] for _ in range(n + 1)]
for i in range(3):
    dp[0][i] = 0


def rec(i, choice):
    if dp[i][choice] > 0:
        return dp[i][choice]
    if i == n:
        return 0
    ret = 0  # ループじゃなくてifでやってるのでそれぞれ確実に大きい値が入る（ので更新する必要がない）
    if choice == 0:
        ret = a[i] + max(rec(i + 1, 1), rec(i + 1, 2))
    elif choice == 1:
        ret = b[i] + max(rec(i + 1, 0), rec(i + 1, 2))
    elif choice == 2:
        ret = c[i] + max(rec(i + 1, 0), rec(i + 1, 1))
    dp[i][choice] = ret
    return ret


print(max(rec(0, 0), rec(0, 1), rec(0, 2)))


### FIXED CODE ###

# dp[i日目][i-1日目にどれを選んだか] = i日目までの最大の幸福度
import sys
sys.setrecursionlimit(10 ** 8)

n = int(input())
a, b, c = [0 for _ in range(n)], [0 for _ in range(n)], [0 for _ in range(n)]
for i in range(n):
    a[i], b[i], c[i] = map(int, input().split())

dp = [[-1 for _ in range(3)] for _ in range(n + 1)]
for i in range(3):
    dp[0][i] = 0


def rec(i, choice):
    if dp[i][choice] > 0:
        return dp[i][choice]
    if i == n:
        return 0
    ret = 0  # ループじゃなくてifでやってるのでそれぞれ確実に大きい値が入る（ので更新する必要がない）
    if choice == 0:
        ret = a[i] + max(rec(i + 1, 1), rec(i + 1, 2))
    elif choice == 1:
        ret = b[i] + max(rec(i + 1, 0), rec(i + 1, 2))
    elif choice == 2:
        ret = c[i] + max(rec(i + 1, 0), rec(i + 1, 1))
    dp[i][choice] = ret
    return ret


print(max(rec(0, 0), rec(0, 1), rec(0, 2)))
def lmc(a,b):
	i = 1
	while(1):
		c = a*i
		if c % b == 0:
			return c
		i += 1

print("a= ",end="")
a= int(input())
print("b= ",end="")
b= int(input())
print(lmc(a,b))

### FIXED CODE ###

def LMC(a,b):
  i = 1
  while(1):
    c = a * i
    if c % b == 0:
      return c
    i += 1

num_line = [int(i) for i in input().split(" ")]
print(LMC(num_line[0],num_line[1]))
s = input()
q = int(input())
for _ in range(q):
    query = input().split()
    if query[0] == '1':
        s = s[::-1]
    else:
        if query[1] == '1':
            s = query[2] + s
        else:
            s = s + query[2]
    print(s)


### FIXED CODE ###

from collections import deque

is_reverse = False
s = deque(input())
q = int(input())
for _ in range(q):
    query = input().split()
    if query[0] == '1':
        is_reverse = not is_reverse
    else:
        if (not is_reverse and query[1] == '1') or (is_reverse and query[1] == '2'):
            s.appendleft(query[2])
        else:
            s.append(query[2])
print(''.join(s)[::-1]) if is_reverse else print(''.join(s))
from math import inf

l, r = map(int, input().split())
ans = inf
for i in range(l, r):
    for j in range(i+1, r+1):
        tmp = i * j % 2019
        ans = tmp if tmp < ans else ans
        if ans == 0:
            break

print(ans)


### FIXED CODE ###

l, r = map(int, input().split())
ans = 2020
if l <= (l // 2019 + 1) * 2019 <= r:
    ans = 0
else:
    for i in range(l, r):
        for j in range(i + 1, r + 1):
            tmp = i * j % 2019
            ans = tmp if tmp < ans else ans
            if ans == 0:
                break
print(ans)