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

import math
import string
import collections
from collections import Counter


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


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


def has_duplicates2(seq):
    seen = []
    for item in seq:
        if not(item in seen):
            seen.append(item)
    return len(seq) != len(seen)


def divisor(n):
    divisor = []
    for i in range(1, n+1):
        if n % i == 0:
            divisor.append(i)
    return divisor


# coordinates
dx = [-1, -1, -1, 0, 0, 1, 1, 1]
dy = [-1, 0, 1, -1, 1, -1, 0, 1]


n = int(input())
a = readints()
# print(a)
aa = a[1:]
so_aa = sorted(aa)
c = Counter(so_aa)
d = c.most_common()
# print(d)
sum = 0
for i in range(len(d)):
    if d[0+i][1] != 1:
        sum += nCr(d[0+i][1], 2)
print(sum)
for j in range(1, n):
    aaa = a[:j]+a[j+1:]
    so_aaa = sorted(aaa)
    cc = Counter(so_aaa)
    dd = cc.most_common()
    # print(dd)
    sumsum = 0
    for k in range(len(dd)):
        # sumsum = 0
        if dd[0+k][1] != 1:
            sumsum += nCr(dd[0+k][1], 2)
    print(sumsum)


### FIXED CODE ###

import math
import string
import collections
from collections import Counter


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


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


def has_duplicates2(seq):
    seen = []
    for item in seq:
        if not(item in seen):
            seen.append(item)
    return len(seq) != len(seen)


def divisor(n):
    divisor = []
    for i in range(1, n+1):
        if n % i == 0:
            divisor.append(i)
    return divisor


# coordinates
dx = [-1, -1, -1, 0, 0, 1, 1, 1]
dy = [-1, 0, 1, -1, 1, -1, 0, 1]

n = int(input())
a = readints()
# print(a)
c = Counter(a)  # リストの各要素の出現回数をカウント
# print(c)
cnt = 0
# print(c.values())
for i in c.values():
    # 各要素の値に対してforループ処理
    cnt += i*(i-1)//2
for aa in a:
    x = c[aa]
    # print(x)
    ans = (cnt-x*(x-1)//2+(x-1)*(x-2)//2)
    print(ans)
### BUGGY CODE ###

import bisect

N = int(input())
L = [int(n) for n in input().split()]
L = sorted(L)

triples = set()

for i in range(len(L)):
    for j in range(i):
        a = L[i]
        b = L[j]

        right_index = j
        left_index = bisect.bisect_right(L, a-b)
        
        for k in range(left_index, right_index):
            c = L[k]
            triple = frozenset([a,b,c])
            if len(triple) == 3:
                triples.add(triple)

print(len(triples))

### FIXED CODE ###

import bisect

N = int(input())
L = [int(n) for n in input().split()]
L = sorted(L)

total = 0

for i in range(N - 2):
    a = L[i]
    for j in range(i + 1, N - 1):
        b = L[j]
        right_endpoint = bisect.bisect_left(L, a+b, j)
        total += right_endpoint - j - 1

print(total)
### BUGGY CODE ###

def eratosthenes(N):
    is_prime = {i: True for i in range(2, N+1)}
    primes = []
    for i in range(2, N+1):
        if is_prime[i]:
            primes.append(i)
            if i**2 <= N:
                for j in range(i**2, N+1, i):
                    is_prime[j] = False
    return primes


def gcd(a, b):
    a, b = max(a, b), min(a, b)
    if b == 0:
        return a
    return gcd(b, a % b)


def main():
    N = int(input())
    A = list(map(int, input().split()))
    A.sort(reverse=True)
    allgcd = A[0]
    primes = eratosthenes(1000)
    divs = set()
    pairwise_coprime = True
    for a in A:
        if allgcd > 1:
            allgcd = gcd(allgcd, a)
        if not pairwise_coprime:
            continue
        for p in primes:
            if a % p == 0:
                if p in divs:
                    pairwise_coprime = False
                while a % p == 0:
                    a //= p
                divs.add(p)
        if a != 1:
            if a in divs:
                pairwise_coprime = False
            divs.add(a)
    if pairwise_coprime:
        print("pairwise coprime")
    else:
        if allgcd == 1:
            print("setwise coprime")
        else:
            print("not coprime")


if __name__ == "__main__":
    main()


### FIXED CODE ###

def eratosthenes(N):
    is_prime = {i: True for i in range(2, N+1)}
    primes = []
    for i in range(2, N+1):
        if is_prime[i]:
            primes.append(i)
            if i**2 <= N:
                for j in range(i**2, N+1, i):
                    is_prime[j] = False
    return primes


def gcd(a, b):
    a, b = max(a, b), min(a, b)
    if b == 0:
        return a
    return gcd(b, a % b)


def main():
    N = int(input())
    A = list(map(int, input().split()))
    allgcd = A[0]
    primes = eratosthenes(1000)
    divs = set()
    pairwise_coprime = True
    for a in A:
        if allgcd > 1:
            allgcd = gcd(allgcd, a)
        if not pairwise_coprime:
            continue
        for p in primes:
            if a % p == 0:
                if p in divs:
                    pairwise_coprime = False
                while a % p == 0:
                    a //= p
                divs.add(p)
            if a == 1:
                break
        if a != 1:
            if a in divs:
                pairwise_coprime = False
            divs.add(a)
    if pairwise_coprime:
        print("pairwise coprime")
    else:
        if allgcd == 1:
            print("setwise coprime")
        else:
            print("not coprime")


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

n,k=map(int,input().split())
a=list(map(int,input().split()))
dp=[0]*n
for i in range(1,n):
  dp[i]=min([dp[j]+abs(a[i]-a[j]) for j in range(max(0,i-k),i)])
print(dp[-1])


### FIXED CODE ###

import sys
input = sys.stdin.readline
def fun(n,a,k):
 dp=[0]*n
 for i in range(1,n):
  dp[i]=min([dp[j]+abs(a[i]-a[j]) for j in range(max(0,i-k),i)])
 print(dp[len(dp)-1])
if __name__ == '__main__':
 n,k = map(int, input().split())
 a=list(map(int,input().split()))
 fun(n,a,k)
### BUGGY CODE ###

N=int(input())
S=input()
#print(S[1])
cnt=0
cnt2=0
for k in range(1,N+1):
  for j in range(1,k):
    for i in range(1,j):
      if (j-i)!=(k-j):
        if S[i-1]!=S[j-1] and S[i-1]!=S[k-1] and S[j-1]!=S[k-1]:
          cnt += 1
          #print(i,j,k,j-i,k-j, S[i-1],S[j-1],S[k-1])
print(cnt)

### FIXED CODE ###

N=int(input())
S=input()

r=S.count('R')
g=S.count('G')
b=S.count('B')
al_num=r*g*b

#全体からj-i=k-jの場合を引く
sub=0
for i in range(0,N):
  for j in range(i+1,N):
    if S[i]==S[j]:
      continue

    k = 2*j -i
    #i,j,kは等差数列なのでkは決まる, k>=Nは不適なのでスキップ
    if k>=N or S[k]==S[i] or S[k]==S[j]:
      continue
    
    sub += 1
print(al_num - sub)
# O(N^2)
### BUGGY CODE ###

import sys
input = sys.stdin.buffer.readline
from itertools import product
INF = 10**18

def sol():
    N = int(input())
    XYP = [tuple(map(int, input().split())) for _ in range(N)]
    XYP.sort(key=lambda xyp: xyp[2], reverse=True)

    X = [x for x, _, _ in XYP]
    Y = [y for _, y, _ in XYP]

    def calcCost(AP, A):
        ret = [[INF] * N for _ in range(1 << N)]
        for state in range(1 << N):
            useA = [a for i, a in enumerate(A) if (state & (1 << i)) != 0]
            for i, (a, p) in enumerate(AP):
                cost = abs(a)
                for z in useA:
                    cost = min(cost, abs(a - z))
                ret[state][i] = cost * p
        return ret

    costX = calcCost([(x, p) for x, _, p in XYP], X)
    costY = calcCost([(y, p) for _, y, p in XYP], Y)

    ans = [INF] * (N + 1)
    for state in product((0, 1, 2), repeat=N):
        stateX = 0
        stateY = 0
        M = N
        for s in state:
            stateX <<= 1
            stateY <<= 1
            if s == 0: M -= 1
            if s == 1: stateX |= 1
            if s == 2: stateY |= 1

        cx, cy = costX[stateX], costY[stateY]
        cost = 0
        for i in range(N):
            cost += min(cx[i], cy[i])
            if cost >= ans[M]:
                break
        else:
            ans[M] = cost

    print(*ans, sep='\n')

sol()


### FIXED CODE ###

import sys
input = sys.stdin.buffer.readline
from numba import njit
import numpy as np
INF = 10**18

@njit('(i8, i8[:,:])')
def solve(N, XYP):
    X = XYP[:, 0]
    Y = XYP[:, 1]

    def calcCost(sign, A):
        ret = np.ones((1 << N, N), dtype=np.int64) * INF
        for state in range(1 << N):
            useA = [a for i, a in enumerate(A) if (state & (1 << i)) != 0]
            for i in range(N):
                xyp = XYP[i]
                cost = abs(xyp[sign])
                for z in useA:
                    cost = min(cost, abs(xyp[sign] - z))
                ret[state][i] = cost * xyp[2]
        return ret

    costX = calcCost(0, X)
    costY = calcCost(1, Y)
    ans = np.ones(N + 1, dtype=np.int64) * INF

    for state in range(pow(3, N)):
        stateX = 0
        stateY = 0
        M = N
        for _ in range(N):
            state, r = divmod(state, 3)
            stateX <<= 1
            stateY <<= 1
            if r == 0: M -= 1
            if r == 1: stateX |= 1
            if r == 2: stateY |= 1

        cx, cy = costX[stateX], costY[stateY]
        cost = 0
        for i in range(N):
            cost += min(cx[i], cy[i])
        ans[M] = min(ans[M], cost)

    for a in ans:
        print(a)

def sol():
    N = int(input())
    XYP = np.asarray([list(map(int, input().split())) for _ in range(N)])
    solve(N, XYP)

sol()
### BUGGY CODE ###

def main():
	n,p = map(int,input().split())
	s = [int(c) for c in list(input().strip())]
	s = s[::-1]
	num = 0
	ans = 0
	if p == 2 or p == 5:
		for i in range(n):
			if s[i]%p == 0:
				ans += n-i
		print(ans)
		return
	arr = [0]*p
	arr[0]=1
	z = 1
	t = 0
	for ss in s:
		t = (t + z*ss)%p	
		z *=10 %p
		arr[t] += 1
	for l in arr:
		ans += l * (l - 1) // 2
	print(ans)
if __name__ == '__main__':
	main()


### FIXED CODE ###

def main():
	N,P = map(int,input().split())
	S = [int(s) for s in list(input().strip())][::-1]
	num = 0
	ans = 0
	if P == 2 or P == 5:
		for i in range(N):
			if S[i]%P == 0:
				ans += N-i
		print(ans)
		return
	L = [0]*P
	L[0]=1
	t = 0
	s = 1
	for z in S:
		t = (z*s+t)%P	
		L[t]+=1
		s=s*10%P
	for l in L:
		ans += l * (l - 1) // 2
	print(ans)

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

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

ans=set()
l, r = map(int, input().split())
for j in range(l,r+1):
    ans.add(j)

for i in range(m-1):
  l, r = map(int, input().split())
  temp=set()
  for j in range(l,r+1):
    temp.add(j)
  ans=temp & ans

print(len(ans))

### FIXED CODE ###

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

ans=set()
lm=0
rm=n
for i in range(m):
  l, r = map(int, input().split())
  lm=max(l, lm)
  rm=min(r, rm)
if rm - lm < 0:
  print(0)
else:
  print(rm - lm + 1)
### BUGGY CODE ###

import sys
import copy

def I(): return int(sys.stdin.readline().rstrip())
def LI():return list(map(int,sys.stdin.readline().rstrip().split()))
def LS():return list(sys.stdin.readline().rstrip().split())

def main():
    N,K = LI()[:]
    A = LI()
    #print(N,K)
    #print(A)

    for k in range(K):
        B = [0]*N
        for i, a in enumerate(A):
            #print(i, a)
            if a == 0:
                B[i] += 1
            else:
                # i-(a+0.5) ~ i+(a+0.5)
                # i: 整数、a: ＋整数　なので +0.5 は切り捨てられる。
                #　影響範囲は、 i-a ~ i+a
                for p in range(i-a,i+a+1):
                    #print("p:",p)
                    if p >=0 and p < N:
                        B[p] += 1
                #print(B)
        if k < K-1:
            A = B

    print(" ".join(map(str,B)))


if __name__ == '__main__':
    main()


### FIXED CODE ###

import sys
import numpy as np
from numba import njit
 
readline = sys.stdin.readline
 
@njit('i8,i8,i8[::1]',cache=True)
def loop(n,k,a):
    for j in range(k):
        b = np.zeros(n+1, dtype=np.int64)
        for i in range(n):
            b[max(i-a[i], 0)] += 1
            b[min(i+a[i]+1, n)] -= 1
        a = np.cumsum(b)[:-1]
        if np.all(a==n):
            return(a)
            break
    else:
        return(a)
 
 
n, k = map(int, readline().split())
a = np.array(readline().split(), dtype=np.int64)
 
ans = loop(n,k,a)
print(*ans)
### BUGGY CODE ###

import sys, re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, log2, floor
from itertools import accumulate, permutations, combinations, product
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits
from bisect import bisect, bisect_left
from fractions import gcd
from heapq import heappush, heappop
from functools import reduce
def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
mod = 10 ** 9 + 7

H, N = MAP()
temp = []
for i in range(N):
	temp.append(LIST())
temp = [list(x) for x in zip(*temp)]
A, B = temp[0], temp[1]

DP = [[INF]*(H + max(A) + 1) for _ in range(N + 1)]

DP[0][0] = 0

for i in range(N):
	for j in range(H + max(A) + 1):
		if j < A[i]:
			DP[i+1][j] = DP[i][j]
		else:
			DP[i+1][j] = min(DP[i][j], DP[i+1][j-A[i]] + B[i])

print(min(DP[N][H:H + max(A) + 1]))

### FIXED CODE ###

import sys, re
from collections import deque, defaultdict, Counter
from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, floor
from itertools import accumulate, permutations, combinations, product
from operator import itemgetter, mul
from copy import deepcopy
from string import ascii_lowercase, ascii_uppercase, digits
from bisect import bisect, bisect_left
from fractions import gcd
from heapq import heappush, heappop
from functools import reduce
def input(): return sys.stdin.readline().strip()
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(): return list(map(int, input().split()))
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
mod = 10 ** 9 + 7

H, N = MAP()
temp = [LIST() for _ in range(N)]
temp = [list(x) for x in zip(*temp)]
A, B = temp[0], temp[1]

DP = [[INF]*(H + max(A) + 1) for _ in range(N + 1)]
DP[0][0] = 0
a = max(A)

for i in range(N):
	for j in range(H + a + 1):
		if j < A[i]:
			DP[i+1][j] = DP[i][j]
		else:
			DP[i+1][j] = min(DP[i][j], DP[i+1][j-A[i]] + B[i])

print(min(DP[N][H:H + max(A) + 1]))
### BUGGY CODE ###

n = int( raw_input( ) )
eles = []
for i in range( n ):
	op = raw_input( ).split( " " )
	if "insert" == op[0]:
		eles.insert( 0, op[1] )
	elif "delete" == op[0]:
		if op[1] in eles:
			eles.remove( op[1] )
	elif "deleteFirst" == op[0] :
		del eles[0]
	elif "deleteLast" == op[0]:
		eles.pop( )

print( " ".join( eles ) )

### FIXED CODE ###

import sys
from collections import deque

n = int( sys.stdin.readline( ) )
que = deque( )
lines = sys.stdin.readlines()
for line in lines:
	op = line.rstrip().split( " " )
	if "insert" == op[0]:
		que.appendleft( op[1] )
	elif "delete" == op[0]:
		if op[1] in que:
			que.remove( op[1] )
	elif "deleteFirst" == op[0] :
		que.popleft( )
	elif "deleteLast" == op[0]:
		que.pop( )


print( " ".join( que ) )
### BUGGY CODE ###

h,a,*m=open(0)
h,w,k,a,b,f,g=map(int,(h+a).split())
d=[I:=h*w]*I
a=~w+a*w+b
d[a]=1
q=[a]
for s in q:
 for y,x in(-1,0),(0,-1),(0,1),(1,0):
  for z in range(k):
   i,j=s//w+y*~z,s%w+x*~z;t=i*w+j
   if(h>i>-1<j<w)-1or'.'<m[i][j]or d[t]<=d[s]:break
   if d[t]==I:q+=t,;d[t]=d[s]+1
print(d[~w+f*w+g]%I-1)

### FIXED CODE ###

I=9**9
h,a,*m=open(0)
h,w,k,a,b,f,g=map(int,(h+a).split())
d=[I]*h*w
a=~w+a*w+b
d[a]=1
q=[a]
for s in q:
 for y,x in(1,0),(-1,0),(0,1),(0,-1):
  for z in range(k):
   i,j=s//w+y*~z,s%w+x*~z;t=i*w+j
   if(h>i>-1<j<w)-1or'.'<m[i][j]or d[t]<=d[s]:break
   if d[t]==I:q+=t,;d[t]=d[s]+1
print(d[~w+f*w+g]%I-1)
### BUGGY CODE ###

# -*- coding: utf-8 -*-
# map(int, input().split())
N,X,M = map(int, input().split())

first_A = [X]
mod_M = [False for i in range(M)]

is_break = False
for i in range(min(N-1,M+1)):
    A_n1 = pow(first_A[-1],2)%M
    if A_n1 in first_A+[1,0]:
        is_break = True
        last_num = A_n1
        break
    else:
        first_A.append(A_n1)

if is_break:
    if last_num == 0:
        print(sum(first_A))
    elif last_num == 1:
        nokori = N-len(first_A)
        print(sum(first_A)+nokori)
    else: # roop
        loop_idx = first_A.index(last_num)
        first_A, second_A = first_A[:loop_idx], first_A[loop_idx:]
        roop = int((N-len(first_A))/len(second_A))
        nokori_kaisuu = (N-len(first_A)) - (roop*len(second_A))
        if nokori_kaisuu == 0:
            print(sum(first_A)+(sum(second_A)*roop))
        else:
            print(sum(first_A)+(sum(second_A)*roop)+sum(second_A[:nokori_kaisuu]))
else:
    print(sum(first_A))

### FIXED CODE ###

# -*- coding: utf-8 -*-
# map(int, input().split())
N,X,M = map(int, input().split())

first_A = [X]
mod_M = [False for i in range(M+1)]
mod_M[0] = True
mod_M[1] = True

is_break = False
for i in range(min(N-1,M+1)):
    A_n1 = pow(first_A[-1],2)%M
    if mod_M[A_n1]:
        is_break = True
        last_num = A_n1
        break
    else:
        first_A.append(A_n1)
        mod_M[A_n1] = True

if is_break:
    if last_num == 0:
        print(sum(first_A))
    elif last_num == 1:
        nokori = N-len(first_A)
        print(sum(first_A)+nokori)
    else: # roop
        loop_idx = first_A.index(last_num)
        first_A, second_A = first_A[:loop_idx], first_A[loop_idx:]
        roop = int((N-len(first_A))/len(second_A))
        nokori_kaisuu = (N-len(first_A)) - (roop*len(second_A))
        if nokori_kaisuu == 0:
            print(sum(first_A)+(sum(second_A)*roop))
        else:
            print(sum(first_A)+(sum(second_A)*roop)+sum(second_A[:nokori_kaisuu]))
else:
    print(sum(first_A))
### BUGGY CODE ###

n = int(input())
s = str(input())
 
R = []
G = []
B = []
for i in range(n):
  if s[i] == "R":
    R.append(i+1)
  elif s[i] == "G":
    G.append(i+1)
  else:
    B.append(i+1)
 
  
ans = 0
 
for i in range(len(R)):
  for j in range(len(G)):
    temp = 0
    if 2*R[i] - G[j] > 0 and 2*R[i] - G[j] <= n:
      if 2*R[i] - G[j] in B:
        temp += 1
    if 2*G[j] - R[i] > 0 and 2*G[j] - R[i] <= n:
      if 2*G[j] - R[i] in B:
        temp += 1
    if (R[i]+G[j])%2 == 0:
      if (R[i]+G[j])/2 in B:
        temp += 1
    ans += len(B)- temp
 
print(ans)

### FIXED CODE ###

n = int(input())
s = str(input())

R = []
G = []
B = []
for i in range(n):
  if s[i] == "R":
    R.append(i+1)
  elif s[i] == "G":
    G.append(i+1)
  else:
    B.append(i+1)

  
ans = 0

for i in range(len(R)):
  for j in range(len(G)):
    temp = 0
    if 2*R[i] - G[j] >0 and 2*R[i] - G[j] <= n:
      if s[2*R[i] - G[j] -1] == "B":
        temp += 1
    if 2*G[j] - R[i] >0 and 2*G[j] - R[i] <= n:
      if s[2*G[j] - R[i]-1] == "B":
        temp += 1
    if (R[i]+G[j])%2 == 0:
      if s[(R[i]+G[j])//2-1] == "B":
        temp += 1
    ans += len(B)- temp

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

n, a = map(int, input().split())
x = list(map(int, input().split()))
s = sum(x)
dp = [[0] * (s * n + 1) for _ in range(n + 1)]
for i in range(1, n + 1):
    dp[i][x[i - 1]] = 1
    for j in range(1, s + 1):
        dp[i][j] += dp[i - 1][j]
    for j in range(s + 1, s * n + 1):
        dp[i][j] = dp[i - 1][max(0, j - s - x[i - 1])] + dp[i - 1][j]
ans = 0
for i in range(1, n + 1):
    if i * a > s:
        print(ans)
        exit()
    ans += dp[n][i * a + (i - 1) * s]
print(ans)

### FIXED CODE ###

n, a = map(int, input().split())
x = list(map(int, input().split()))
s = sum(x)
dp = [[0] * (s * n + 1) for _ in range(n + 1)]
for i in range(1, n + 1):
    dp[i][x[i - 1]] = 1
    for j in range(1, s + 1):
        dp[i][j] += dp[i - 1][j]
    for j in range(s + 1, s * n + 1):
        dp[i][j] = dp[i - 1][max(0, j - s - x[i - 1])] + dp[i - 1][j]
ans = 0
for i in range(1, n + 1):
    if i * a > s:
        print(ans)
        exit()
    ans += dp[n][i * a + (i - 1) * s]
print(ans)
### BUGGY CODE ###

s=input()
sub=set()
for i in range(len(s)):
    for j in range(i,len(s)+1):
        f=s[i:j]
        if f!='':
            sub.add(f)
S=list(sub)
k=int(input())
print(sorted(S)[k-1])


### FIXED CODE ###

s=input()
sub=set()
for i in range(len(s)):
    for j in range(i,min(i+6,len(s)+1)):
        f=s[i:j]
        if f!='':
            sub.add(f)
S=list(sub)
k=int(input())
print(sorted(S)[k-1])
### BUGGY CODE ###

n=int(input())
A=list(map(int,input().split()))
A.sort()
ans=int(0)
for i in range(n-2):
    for j in range(i+1,n-1):
        now=A[i]+A[j]
        l=int(j+1)
        r=int(n)
        while r-l>=1:
            x=int((r+l)/2)
            if A[x]<now:
                l=x+1
            else:
                r=x
        ans+=r-j-1
print(ans)

### FIXED CODE ###

n=int(input())
A=list(map(int,input().split()))
A.sort()
ans=int(0)
for i in range(n-2):
    for j in range(i+1,n-1):
        now=A[i]+A[j]
        l=int(j+1)
        r=int(n)
        while r-l>=1:
            x=int((r+l)/2)
            if A[x]<now:
                l=x+1
            else:
                r=x
        ans+=r-j-1
print(ans)
### BUGGY CODE ###


"""
https://atcoder.jp/contests/abc048/tasks/abc048_b
"""

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

ans = 0

for i in range(a,b+1):
    if i % x == 0:
        ans += 1

print(ans)


### FIXED CODE ###


"""
https://atcoder.jp/contests/abc048/tasks/abc048_b
"""

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

def f(n,d):
    if n == -1:
        return 0
    return n // d+1

print(f(b,x)-f(a-1,x))

"""
ans = 0

for i in range(a,b+1):
    if i % x == 0:
        ans += 1

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

l, r = map(int, input().split())

mod = 2019
ans = mod
for i in range(l, r):
    res = 0
    for j in range(i+1, r+1):
        res = i*j % mod
        ans = min(ans, res)
    if res == 0:
        break

print(ans)

### FIXED CODE ###

l, r = map(int, input().split())

mod = 2019
ans = mod
for i in range(l, r):
    for j in range(i+1, r+1):
        res = (i*j) % mod
        ans = min(ans, res)
        if res == 0:
            print(ans)
            exit()

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

from collections import deque
h,w=map(int,input().split())
INF=10**18
a=[input() for _ in range(h)]
d=[[INF for _ in range(w)]for _ in range(h)]
q=deque([])
for i in range(h):
  for j in range(w):
    if a[i][j]=='#':
      d[i][j]=0
      q.append((i,j))
dx=[1,0,-1,0]
dy=[0,1,0,-1]
ans=0
while q:
  x,y=q.popleft()
  for i in range(4):
    nx=x+dx[i]
    ny=y+dy[i]
    if 0<=nx<h and 0<=ny<w:
      if d[nx][ny]==INF:
        q.append((nx,ny))
        d[nx][ny]=d[x][y]+1
        ans=max(ans,d[nx][ny])
print(ans)

### FIXED CODE ###

from collections import deque
h,w=map(int,input().split())
INF=10**18
a=[input() for _ in range(h)]
d=[[INF for _ in range(w)]for _ in range(h)]
q=deque([])
for i in range(h):
  for j in range(w):
    if a[i][j]=='#':
      d[i][j]=0
      q.append((i,j))
dx=[1,0,-1,0]
dy=[0,1,0,-1]
ans=0
while q:
  x,y=q.popleft()
  for i in range(4):
    nx=x+dx[i]
    ny=y+dy[i]
    if 0<=nx<h and 0<=ny<w:
      if d[nx][ny]==INF:
        q.append((nx,ny))
        d[nx][ny]=d[x][y]+1
        ans=max(ans,d[nx][ny])
print(ans)