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

#!/usr/bin/env python3

import sys
import math
from bisect import bisect_right as br
from bisect import bisect_left as bl
sys.setrecursionlimit(2147483647)
from heapq import heappush, heappop,heappushpop
from collections import defaultdict
from itertools import accumulate
from collections import Counter
from collections import deque
from operator import itemgetter
from itertools import permutations
mod = 10**9 + 7
inf = float('inf')
def I(): return int(sys.stdin.readline())
def LI(): return list(map(int,sys.stdin.readline().split()))

h, w = LI()
ch, cw = LI()
dh, dw = LI()
s = [list(input()) for _ in range(h)]

dx, dy = [1, 0, -1, 0], [0, 1, 0, -1]
d = [[10**10] * w for _ in range(h)]
d[ch-1][cw-1] = 0
H = []
heappush(H, (0, cw-1, ch-1))
while H:
    D, x, y = heappop(H)
    for i in range(-2, 3):
        for j in range(-2, 3):
            nx, ny = x + i, y + j
            if 0 <= nx < w and 0 <= ny < h:
                if abs(i) + abs(j) <= 1:
                    if s[ny][nx] == '.' and d[ny][nx] > D:
                        d[ny][nx] = D
                        heappush(H, (D, nx, ny))
                else:
                    if s[ny][nx] == '.' and d[ny][nx] > D + 1:
                        d[ny][nx] = D + 1
                        heappush(H, (D + 1, nx, ny))
if d[dh-1][dw-1] == 10**10:
    print(-1)
else:
    print(d[dh-1][dw-1])


### FIXED CODE ###

#!/usr/bin/env python3

import sys
import math
from bisect import bisect_right as br
from bisect import bisect_left as bl
sys.setrecursionlimit(2147483647)
from heapq import heappush, heappop,heappushpop
from collections import defaultdict
from itertools import accumulate
from collections import Counter
from collections import deque
from operator import itemgetter
from itertools import permutations
mod = 10**9 + 7
inf = float('inf')
def I(): return int(sys.stdin.readline())
def LI(): return list(map(int,sys.stdin.readline().split()))

h, w = LI()
ch, cw = LI()
dh, dw = LI()
s = [input() for _ in range(h)]

dx, dy = [1, 0, -1, 0], [0, 1, 0, -1]
que = deque([(cw-1, ch-1)])
d = [[10**10] * w for _ in range(h)]
d[ch-1][cw-1] = 0
while que:
    x, y = que.popleft()
    for i in range(4):
        nx, ny = x + dx[i], y + dy[i]
        if 0 <= nx < w and 0 <= ny < h:
            if s[ny][nx] == '.' and d[ny][nx] > d[y][x]:
                d[ny][nx] = d[y][x]
                que.appendleft((nx, ny))
    for i in range(-2, 3):
        for j in range(-2, 3):
            nx, ny = x + i, y + j
            if 0 <= nx < w and 0 <= ny < h:
                if s[ny][nx] == '.' and d[ny][nx] > d[y][x] + 1:
                    d[ny][nx] = d[y][x] + 1
                    que.append((nx, ny))
if d[dh-1][dw-1] == 10**10:
    print(-1)
else:
    print(d[dh-1][dw-1])
### BUGGY CODE ###

n = int(input())
a = list(map(int, input().split()))
f = 1

for i in a:
    f *= i
  


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

### FIXED CODE ###

n = int(input())
a = list(map(int, input().split()))
ans = 1

if 0 in a:
    print(0)
else:
    for i in a:
        ans *= i
        
        if ans > 10**18:
            print(-1)
            exit()
            
    print(ans)
### BUGGY CODE ###

#!/snap/bin/pypy3

def main():
    N = int(input())
    nums = list(map(int, input().split()))
    sorted_num = sorted(nums)
    res = 1
    i = sorted_num[1]
    while True:
        nums_div_i = [num % i for num in nums]
        # print(i, nums_div_i)
        _len = len(tuple(filter(lambda x: x > 0, nums_div_i)))
        if _len == 1 or _len == 0:
            break

        i -= 1

    print(i)

if __name__ == '__main__':
    main()


### FIXED CODE ###

#!/snap/bin/pypy3
def gcd(a, b):
    if b == 0:
        return a
    c = a % b
    return gcd(b, c)


def main():
    N = int(input())
    nums = list(map(int, input().split()))

    L = [0 for _ in range(N + 1)]
    R = [0 for _ in range(N + 1)]

    for i, num in enumerate(nums):
        L[i + 1] = gcd(L[i], num)

    for i in range(N - 2, -1, -1):
        R[i] = gcd(R[i + 1], nums[i + 1])

    print(max(gcd(L[i], R[i]) for i in range(N)))


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

import numpy as np
n,k = map(int,input().split())
num_list = list(map(int,input().split()))
ans = 0
num_list = np.sort(num_list)[::-1]
num_list = np.array(num_list)

if k > len(num_list):
    ans = 0
    
else:
    for i in range(k):
        num_list = np.delete(num_list,0)
    ans = sum(num_list)
print(ans)

### FIXED CODE ###

import numpy as np
n,k = map(int,input().split())
num_list = list(map(int,input().split()))
ans = 0
num_list = np.sort(num_list)[::-1]
num_list = np.array(num_list)

if k > len(num_list):
    ans = 0
    
else:
    for i in range(n-k):
        ans += num_list[i+k]
print(ans)
### BUGGY CODE ###

s=input()
l=len(s)
ans=0
p=0
a={}
b=-1
c=-1
d=-1
for j in range(l)[::-1]:
    p=(p+int(s[j])*10**(l-j-1))%2019
    if b>0:
        if a.get(b)!=None:
            a[b]+=1
        else:
            a[b]=1
    b=c
    c=d
    d=p
    if p==0:
        ans+=1
    if a.get(p)!=None:
        ans+=a[p]
print(ans)

### FIXED CODE ###

s=input()
l=len(s)
ans=0
p=0
a={}
b=-1
c=-1
d=-1
e=-1
q=1
for j in range(l)[::-1]:
    p=(p+int(s[j])*q)%2019
    q*=10
    q%=2019
    if p==0:
        ans+=1
    if a.get(p)!=None:
        ans+=a[p]
    if a.get(p)!=None:
        a[p]+=1
    else:
        a[p]=1
print(ans)
### BUGGY CODE ###

## coding: UTF-8

S = input() #文字列型で受け取る
N = len(S)

remainder = [0] * 2019

for i in range(N):
    #print(S[i:], int(S[i:])%2019)
    remainder[int(S[i:])%2019]+= 1
remainder[0] += 1

answer = 0
for i in range(2019):
    answer += int(remainder[i] * (remainder[i]-1) / 2)
print(answer)


### FIXED CODE ###

## coding: UTF-8

S = input()[::-1] #文字列型で受け取る
N = len(S)
#print(S)

remainder = [0] * 2019
tmp = 0
rad = 1 # *10**(i) % 2019
for i in range(N):
    r = int(S[i])
    tmp += r*rad
    tmp %= 2019
    #print(tmp)
    remainder[tmp] += 1
    rad *= 10
    rad %= 2019

    #print(S[i:], int(S[i:])%2019)
    #remainder[int(S[i:])%2019]+= 1
remainder[0] += 1
#print(-1)



answer = 0
for i in range(2019):
    p = remainder[i]
    answer += p*(p-1)/2
print(int(answer))
### BUGGY CODE ###

s = input().split()
K = int(s[0])
A = int(s[1])
B = int(s[2])

import time

bis = 1

if float(B/A) > 2:
  change = 1
else:
  change = 0

if change == 0:
  bis = bis + K
  time.sleep(10000)
else:
  i = A -1
  bis  = A
  k = K - i
  bis += (k//2)*(B-A)
  bis += k %2
print(bis)

### FIXED CODE ###

s = input().split()
K = int(s[0])
A = int(s[1])
B = int(s[2])
 
bis = 1
 
if B-A >  2:
  change = 1
else:
  change = 0
 
if change == 0:
  bis = bis + K
else:
  i = A - 1
  bis  = A
  k = K - i
  bis += (k//2)*(B-A)
  bis += k %2
print(bis)
### BUGGY CODE ###

# -*- coding: utf-8 -*-
"""
Created on Sun Oct  7 22:06:12 2018
ABC073D
@author: maezawa
"""
import itertools as itr
import sys
input = sys.stdin.readline

n, m, r = list(map(int, input().split()))
rarray = list(map(int, input().split()))
adjmatrix = [[10**10]*n for _ in range(n)]
for i in range(n):
    adjmatrix[i][i] = 0
    
for i in range(m):
    a, b, c = list(map(int, input().split()))
    if adjmatrix[a-1][b-1] > c:
        adjmatrix[a-1][b-1] = c
        adjmatrix[b-1][a-1] = c

#print(abc)

# Warshall-Floyd Algorithm
for k in range(n):
    for i in range(n):
        for j in range(n):
            sc = adjmatrix[i][k] + adjmatrix[k][j]
            if sc < adjmatrix[i][j]:
                adjmatrix[i][j] = sc
                adjmatrix[j][i] = sc
        
#print(*adjmatrix, sep='\n')
    
# search for ri to rj
mincnt = 10*10
for route in itr.permutations(rarray):
    cnt = 0
    for i in range(len(rarray)-1):
        cnt += adjmatrix[route[i]-1][route[i+1]-1]
    if cnt < mincnt:
        mincnt = cnt

print(mincnt)
        
        

### FIXED CODE ###

# -*- coding: utf-8 -*-
"""
Created on Mon Oct  8 10:17:39 2018

@author: maezawa
"""

import math
from itertools import permutations

#フロイド・ワーシャル
def warshall_floyd(glath):
	
	for k in range(len(glath)):
		for i in range(len(glath)):
			for j in range(len(glath[i])):
				if glath[i][j] > glath[i][k] + glath[k][j]:
                                   glath[i][j] = glath[i][k] + glath[k][j]
                                   glath[j][i] = glath[i][k] + glath[k][j]				
	return glath

N, M ,R= [int(x) for x in str(input()).split()]  #グラフの大きさ 
r=[int(x) for x in str(input()).split()]
graph=[[float("inf")]*N for i in range(N)]


for i in range(M):
	a,b,c=[int(x) for x in str(input()).split()]
	#if a in r and b in r:
	graph[a-1][b-1]=c
	graph[b-1][a-1]=c

#all_cost=warshall_floyd(select_graph)
all_cost=warshall_floyd(graph)


max_count=float("inf")
for i in permutations(r):
        cost=0
        for j in range(len(i)-1):                
                cost+= all_cost[i[j]-1][i[j+1]-1]       
        max_count=min(max_count,cost)

print(max_count)
### BUGGY CODE ###

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

mod = 10**9 + 7
ans = 0
two = 1
for i in range(61):
    one = 0
    for j in range(n):
        if (a[j] >> i) & 1:
            one += 1
    ans = (ans + (one*(n-one))*two) % mod
    two = (two * 2) % mod
print(ans)

### FIXED CODE ###

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

mod = 10**9 + 7
ans = 0
two = 1
for i in range(61):
    one = 0
    for j in range(n):
        if (a[j] >> i) & 1:
            one += 1
    ans = (ans + (one*(n-one))*two) % mod
    two = (two * 2) % mod
print(ans)
### BUGGY CODE ###

import queue

N = int(input())

pos = []
for _ in range(N):
    a, b = map(int, input().split())
    pos.append((a, b))

visited = {v: False for v in pos}
edges = {v: [] for v in pos}
x_sorted = sorted([(p[0], i) for i, p in enumerate(pos)])
for i in range(len(x_sorted) - 1):
    j = x_sorted[i][1]
    l = x_sorted[i+1][1]
    edges[pos[j]].append((pos[l], abs(pos[l][0] - pos[j][0])))
    edges[pos[l]].append((pos[j], abs(pos[l][0] - pos[j][0])))
y_sorted = sorted([(p[1], i) for i, p in enumerate(pos)])
for i in range(len(y_sorted) - 1):
    j = y_sorted[i][1]
    l = y_sorted[i+1][1]
    edges[pos[j]].append((pos[l], abs(pos[l][1] - pos[j][1])))
    edges[pos[l]].append((pos[j], abs(pos[l][1] - pos[j][1])))

que = queue.PriorityQueue()
que.put((0, pos[0]))

res = 0
while not que.empty():
    cost, vertex = que.get()
    if visited[vertex]:
        continue
    visited[vertex] = True
    res += cost

    for to, next_cost in edges[vertex]:
        que.put((next_cost, to))

print(res)


### FIXED CODE ###

import queue

N = int(input())

pos = []
for _ in range(N):
    a, b = map(int, input().split())
    pos.append((a, b))

visited = {v: False for v in pos}
edges = {v: [] for v in pos}
x_sorted = sorted([(p[0], i) for i, p in enumerate(pos)])
for i in range(len(x_sorted) - 1):
    j = x_sorted[i][1]
    l = x_sorted[i+1][1]
    edges[pos[j]].append((pos[l], abs(pos[l][0] - pos[j][0])))
    edges[pos[l]].append((pos[j], abs(pos[l][0] - pos[j][0])))
y_sorted = sorted([(p[1], i) for i, p in enumerate(pos)])
for i in range(len(y_sorted) - 1):
    j = y_sorted[i][1]
    l = y_sorted[i+1][1]
    edges[pos[j]].append((pos[l], abs(pos[l][1] - pos[j][1])))
    edges[pos[l]].append((pos[j], abs(pos[l][1] - pos[j][1])))

que = queue.PriorityQueue()
que.put((0, pos[0]))

res = 0
while not que.empty():
    cost, vertex = que.get()
    if visited[vertex]:
        continue
    visited[vertex] = True
    res += cost

    for to, next_cost in edges[vertex]:
        if not visited[to]:
            que.put((next_cost, to))

print(res)
### BUGGY CODE ###

import sys
input = sys.stdin.readline
from fractions import gcd
from functools import reduce

def gcd_list(numbers):
    return reduce(gcd, numbers)
def lcm_base(x, y):
    return (x * y) // gcd(x, y)
def lcm_list(numbers):
    return reduce(lcm_base, numbers, 1)

def main():
    N = int(input())
    A = sorted([int(i) for i in input().split()])
    MOD = 10**9+7

    GCD = gcd_list(A)
    LCM = lcm_list(A)
    ans = 0
    if GCD != 1 and LCM == A[-1]:
        for i in range(N):
            ans = (ans + A[-1] // A[i]) % MOD
    else:
        for i in range(N):
            ans = (ans + LCM // A[i]) % MOD

    print(ans)

if __name__ == "__main__":
    main()

### FIXED CODE ###

import sys
input = sys.stdin.readline
from fractions import gcd
from functools import reduce

def extgcd(a,b):
    r = [1,0,a]
    w = [0,1,b]
    while w[2]!=1:
        q = r[2]//w[2]
        r2 = w
        w2 = [r[0]-q*w[0],r[1]-q*w[1],r[2]-q*w[2]]
        r = r2
        w = w2
    #[x,y]
    return [w[0],w[1]]
# aの逆元(mod m)を求める。(aとmは互いに素であることが前提)
def mod_inv(a,m):
    x = extgcd(a,m)[0]
    return (m+x%m)%m

def gcd_list(numbers):
    return reduce(gcd, numbers)
def lcm_base(x, y):
    return (x * y) // gcd(x, y)
def lcm_list(numbers):
    return reduce(lcm_base, numbers, 1)

def main():
    N = int(input())
    A = sorted([int(i) for i in input().split()])
    MOD = 10**9+7

    GCD = gcd_list(A)
    LCM = lcm_list(A) % MOD
    ans = 0
    if GCD != 1 and LCM == A[-1]:
        for i in range(N):
            ans = (ans + A[-1] * mod_inv(A[i],MOD)) % MOD
    else:
        for i in range(N):
            ans = (ans + LCM * mod_inv(A[i],MOD)) % MOD

    print(ans)

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

r1, c1, r2, c2 = map(int, input().split())
mod = int(1e+9) + 7
A = []
p = mod - 2
while p != 0:
  A = [p%2] + A[:]
  p //= 2
def inved(x):
  y = 1
  for i in range(len(A)):
    if A[i] == 1:
      y *= x
      y %= mod
    if i != len(A) - 1:
      y *= y
      y %= mod
  return y
fracr2c2 = 1
fracr1c2 = 1
fracr2c1 = 1
fracr1c1 = 1
fracr2 = 1
fracr1 = 1
fracc2 = 1
fracc1 = 1
for i in range(r2 + c2 + 2):
  if i < r1:
    fracr1 *= i + 1
    fracr1 %= mod
  if i < c1:
    fracc1 *= i + 1
    fracc1 %= mod
  if i < r2 + 1:
    fracr2 *= i + 1
    fracr2 %= mod
  if i < c2 + 1:
    fracc2 *= i + 1
    fracc2 %= mod
  if i < r1 + c1:
    fracr1c1 *= i + 1
    fracr1c1 %= mod
  if i < r1 + c2 + 1:
    fracr1c2 *= i + 1
    fracr1c2 %= mod
  if i < r2 + c1 + 1:
    fracr2c1 *= i + 1
    fracr2c1 %= mod
  if i < r2 + c2 + 2:
    fracr2c2 *= i + 1
    fracr2c2 %= mod
g = 0
g += (fracr2c2 * inved(fracr2) * inved(fracc2)) % mod
g %= mod
g += (fracr1c1 * inved(fracr1) * inved(fracc1)) % mod
g %= mod
g -= (fracr1c2 * inved(fracr1) * inved(fracc2)) % mod
g %= mod
g -= (fracr2c1 * inved(fracr2) * inved(fracc1)) % mod
g %= mod
print(g)

### FIXED CODE ###

r1, c1, r2, c2 = map(int, input().split())
mod = int(1e+9) + 7
def inved(x):
  a, b, c, d, k, l = 1, 0, 0, 1, x, mod
  while l != 0:
    a, b, c, d = c, d, a - c * (k // l), b - d * (k // l)
    k, l = l, k % l
  return a % mod
frac = [1]
for i in range(r2 + c2 + 2):
  frac.append(((i+1) * frac[i]) % mod)
fracr2c2 = frac[r2 + c2 + 2]
fracr1c2 = frac[r1 + c2 + 1]
fracr2c1 = frac[r2 + c1 + 1]
fracr1c1 = frac[r1 + c1]
fracr2 = frac[r2 + 1]
fracr1 = frac[r1]
fracc2 = frac[c2 + 1]
fracc1 = frac[c1]
g = 0
g += (fracr2c2 * inved(fracr2) * inved(fracc2)) % mod
g %= mod
g += (fracr1c1 * inved(fracr1) * inved(fracc1)) % mod
g %= mod
g -= (fracr1c2 * inved(fracr1) * inved(fracc2)) % mod
g %= mod
g -= (fracr2c1 * inved(fracr2) * inved(fracc1)) % mod
g %= mod
print(g)
### BUGGY CODE ###

n = int(input())
s = []
total = 0
for i in range(n):
    s.append(input())
    s[i] = sorted(s[i])
for i in range(n-1):
    for j in range(i+1,n):
        if s[i] == s[j]:
            total += 1
print(total)

### FIXED CODE ###

N = int(input())
s_dict = {}
ans = 0
for i in range(N):
  string = list(input())
  string.sort(reverse=False)
  if tuple(string) in s_dict:
    s_dict[tuple(string)] += 1
  else:
    s_dict[tuple(string)] = 1

for i in s_dict.values():
  if i != 1:
    ans += sum([i for i in range(1,i)])

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

import math

def resolve():
    MOD = 10**9 + 7
    N, K = map(int, input().split())
    A = map(int, input().split())

    A = sorted(A)

    def permutations_count(n, r):
        return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))

    sum = 0
    for i in range(K-1, N):
        sum += permutations_count(i, K-1) * A[i]
        #print(sum)

    A = sorted(A, reverse=True)

    for i in range(K-1, N):
        sum -= permutations_count(i, K-1) * A[i]
        #print(sum)

    print(sum % MOD)


if __name__ == "__main__":
    resolve()

### FIXED CODE ###

import math
from functools import lru_cache
from operator import mul
from functools import reduce


def resolve():
    import sys
    input = sys.stdin.readline
    MOD = 10**9 + 7
    N, K = map(int, input().split())
    A = list(map(int, input().split()))

    A.sort()
    B = A[::-1]

    @lru_cache(maxsize=None)
    def combinations_count__(n, r):
        return math.factorial(n) // (math.factorial(n - r) * math.factorial(r))

    @lru_cache(maxsize=None)
    def combinations_count____(n, r):
        r = min(r, n - r)
        numer = reduce(mul, range(n, n - r, -1), 1)
        denom = reduce(mul, range(1, r + 1), 1)
        return numer // denom

    def combinations_count_(n, r):
        if n - r < r: r = n - r
        if r == 0: return 1
        if r == 1: return n

        numerator = [n - r + k + 1 for k in range(r)]
        denominator = [k + 1 for k in range(r)]

        for p in range(2,r+1):
            pivot = denominator[p - 1]
            if pivot > 1:
                offset = (n - r) % p
                for k in range(p-1,r,p):
                    numerator[k - offset] /= pivot
                    denominator[k] /= pivot

        result = 1
        for k in range(r):
            if numerator[k] > 1:
                result *= int(numerator[k])

        return result

    def modinv(a, mod=10**9+7):
        return pow(a, mod-2, mod)

    def combinations_count(n, r, mod=10**9+7):
        if (r < 0) or (n < r):
            return 0
        r = min(r, n-r)
        return fact[n] * factinv[r] * factinv[n-r] % mod
    
    fact = [1, 1]
    factinv = [1, 1]
    inv = [0, 1]
    for i in range(2, N + 1):
        fact.append((fact[-1] * i) % MOD)
        inv.append((-inv[MOD % i] * (MOD // i)) % MOD)
        factinv.append((factinv[-1] * inv[-1]) % MOD)

    sum = 0
    for i in range(K-1, N):
        sum += combinations_count(i, K-1) * A[i] % MOD - combinations_count(i, K-1) * B[i] % MOD

    print(sum % MOD)


if __name__ == "__main__":
    resolve()
### BUGGY CODE ###

# import bisect
# import copy
# import fractions
# import math
# import numpy as np
# from collections import Counter, deque
# from itertools import accumulate, permutations, combinations, combinations_with_replacement, groupby, product

def resolve():
    N=int(input())
    S=[sorted(list(input())) for i in range(N)]

    cnt=0
    for i in range(N):
        for j in range(i+1,N):
            if S[i]==S[j]:
                cnt+=1

    print(cnt)

resolve()

### FIXED CODE ###

# import bisect
# import copy
# import fractions
# import math
# import numpy as np
from collections import Counter
# from itertools import accumulate, permutations, combinations, combinations_with_replacement, groupby, product

def resolve():
    N=int(input())
    S=[''.join(sorted(input())) for i in range(N)]
    C=Counter(S)
    print(sum(i*(i-1)//2 for i in C.values()))






resolve()
### BUGGY CODE ###

n,m = map(int,input().split())
a = sorted(list(map(int,input().split())), reverse=True)
match = [[0,0], [1,2], [2,5], [3,5], [4,4], [5,5], [6,6], [7,3], [8,7], [9,6]]

value = []
cost = []
for i in range(len(a)):
        value.append(a[i])
        cost.append(match[a[i]][1])

dp = [-1]*(n+1)
dp[0] = ""
for i in range(1,n+1):
    for j in range(len(value)):
        tmp_dp_i = 0
        if i - cost[j] >= 0:
            if i - cost[j] == 0 or (i - cost[j] > 0 and dp[i - cost[j]] != -1):
                tmp_dp_i = str(value[j]) + dp[i-cost[j]]
                tmp_dp_i = int(tmp_dp_i)
                if int(dp[i]) < tmp_dp_i:
                    dp[i] = str(tmp_dp_i)
print(dp[n])

### FIXED CODE ###

n,m = map(int,input().split())
a = sorted(list(map(int,input().split())), reverse=True)
match = [[0,0], [1,2], [2,5], [3,5], [4,4], [5,5], [6,6], [7,3], [8,7], [9,6]]

value = []
cost = []
for i in range(len(a)):
        value.append(a[i])
        cost.append(match[a[i]][1])

dp = ["0"]*(n+1)
dp[0] = ""
for i in range(1,n+1):
    for j in range(len(value)):
        tmp_dp_i = 0
        if i - cost[j] >= 0:
            if i - cost[j] >= 0 and dp[i - cost[j]] != "0":
                tmp_dp_i = str(value[j]) + dp[i-cost[j]]
                if len(dp[i]) < len(tmp_dp_i):
                    dp[i] = tmp_dp_i
                elif dp[i] < tmp_dp_i:
                    dp[i] = tmp_dp_i
print(dp[n])
### BUGGY CODE ###

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

for p in range(n):
    for i in range(n):
        if p == i:
            pass
        elif a[p] == a[i]:
            y = False
        else:
            pass
        
if y:
    print('YES')
else:
    print('NO')

### FIXED CODE ###

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

for i in range(n - 1):
    if a[i] == a[i + 1]:
        y = False
        break
        
if y:
    print('YES')
else:
    print('NO')
### BUGGY CODE ###

N = int(input())
a = [int(x) for x in input().split(" ")]
sum = 0
for i in range(N - 1):
    for j in range(i+1, N):
        sum += a[i] ^ a[j]
print(sum % (10 ** 9 + 7))

### FIXED CODE ###

import numpy as np

N = int(input())
a = np.array([int(x) for x in input().split(" ")], np.int64)
sum = 0
pow = 0
while any(a):
    one = np.count_nonzero(a & 1)
    sum += one * (N - one) * 2 ** pow
    sum %= (10 ** 9 + 7)
    pow += 1
    a >>= 1
print(sum)
### BUGGY CODE ###

h, n = map(int, input().split())
ab = []
for i in range(n):
    ab.append(list(map(int, input().split())))
num = [float("inf")] * (h + 1)
num[0] = 0
for i in range(h):
    mp = []
    for j in range(n):
        if (i + 1) - ab[j][0] < 0:
            mp.append(ab[j][1])
        else:
            mp.append(num[i + 1 - ab[j][0]] + ab[j][1])
    num[i + 1] = min(mp)
print(num[h])

### FIXED CODE ###

h, n = map(int, input().split())
ab = []
for i in range(n):
    ab.append(list(map(int, input().split())))
num = [float("inf")] * (h + 1)
num[0] = 0
for i in range(h):
    mp = []
    for j in range(n):
        if (i + 1) - ab[j][0] < 0:
            mp.append(ab[j][1])
        else:
            mp.append(num[i + 1 - ab[j][0]] + ab[j][1])
    num[i + 1] = min(mp)
print(num[h])
### BUGGY CODE ###

def main():
    L, R = map(int, input().split())
    R = min(R, L + 4038)
    ans = 2018

    for i in range(L, R + 1):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i*j) % 2019)

    print(ans)

if __name__ == "__main__":
    main()

### FIXED CODE ###

def main():
    L, R = map(int, input().split())
    R = min(R, L + 4038)
    ans = 2018

    for i in range(L, R + 2020):
        for j in range(i + 1, R + 1):
            ans = min(ans, (i*j) % 2019)

    print(ans)

if __name__ == "__main__":
    main()