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

H,W = map(int,input().split())
p = []
for i in range(H):
    b = list(input())
    b.append(".")
    p.append(b)

p.append(["."]*(W+1))
c = [[10**9]*(W+1) for i in range(H+1)]

if p[0][0] == ".":
    c[0][0] = 0
else:
    c[0][0] = 1

q = [[0,0]]

i = 0
j = 0
while(len(q) != 0):
    i = q[0][0]
    j = q[0][1]
    q.remove([i,j])
    if p[i+1][j] == ".":
        c[i+1][j] = min(c[i][j],c[i+1][j])
    else:
        c[i+1][j] = min(c[i][j]+1, c[i+1][j])
    if p[i][j+1] == ".":
        c[i][j+1] = min(c[i][j],c[i][j+1])
    else:
        c[i][j+1] = min(c[i][j]+1,c[i][j+1])
    if i < H-1:
        q.append([i+1,j])
    if j < W-1:
        q.append([i,j+1])

print(c[H-1][W-1])

### FIXED CODE ###

H, W = map(int, input().split())
p = []
for i in range(H):
    b = list(input())
    b.append(".")
    p.append(b)

p.append(["."] * (W + 1))
dp = [[10 ** 9] * (W + 1) for i in range(H + 1)]

if p[0][0] == ".":
    dp[0][0] = 0
else:
    dp[0][0] = 1

for i in range(H):
    for j in range(W):
        if p[i + 1][j] == ".":
            dp[i + 1][j] = min(dp[i][j], dp[i + 1][j])
        elif p[i][j] == "#":
            dp[i + 1][j] = min(dp[i][j], dp[i + 1][j])
        else:
            dp[i + 1][j] = min(dp[i][j] + 1, dp[i + 1][j])

        if p[i][j + 1] == ".":
            dp[i][j + 1] = min(dp[i][j], dp[i][j + 1])
        elif p[i][j] == "#":
            dp[i][j + 1] = min(dp[i][j], dp[i][j + 1])
        else:
            dp[i][j + 1] = min(dp[i][j] + 1, dp[i][j + 1])

print(dp[H - 1][W - 1])
### BUGGY CODE ###

S=input()
T=input()
visited=[]

for i in range(len(S)):
    if (S[i] not in visited) and S[i]!=T[i]:
        visited.append(T[i])
        x=S[i]
        S=S.replace(T[i],'_')
        S=S.replace(S[i],T[i])
        S=S.replace('_',x)
    elif (S[i] in visited) and S[i]!=T[i]:
        break
    else:
        visited.append(T[i])
print('No') if S!=T else print('Yes')

### FIXED CODE ###

S=input()
T=input()
R=[-1]*26
R2=[-1]*26
flag=1

for i in range(len(S)):
    a=ord(S[i])-97
    b=ord(T[i])-97
    if R[a]!=-1 or R2[b]!=-1:
        if R[a]!=b or R2[b]!=a:
            flag=0
            break
    else:
        R[a]=b
        R2[b]=a
if flag==0:
    print('No')
else:
    print('Yes')
### BUGGY CODE ###

A,B,K = map(int,input().split())

for i in range(K):
    if A > 0:
        A = A - 1
    elif B > 0:
        B = B - 1

print("{} {}".format(A, B))

### FIXED CODE ###

A,B,K = map(int,input().split())

K1 = K - A

if K >= A:
    A = 0
else:
    A = A - K

if K1 > 0:
    if B >= K1:
        B = B - K1
    else:
        B = 0
        

print("{} {}".format(A, B))
### BUGGY CODE ###

N=int(input().strip())
A=list(map(int, input().strip().split()))
A_posi=[]
A_nega=[]
for i in range(N):
    A[i]=A[i]-(i+1)
    if A[i]<0:
        A_nega.append(A[i]*(-1))
    elif A[i]>0:
        A_posi.append(A[i])
sm=sum(abs(i) for i in A)

A_tgt=A_nega if len(A_nega)>len(A_posi) else A_posi
A_tgt=sorted(A_tgt)
b=0
max_diff=0
if len(A_tgt):
    while b<A_tgt[-1]:
        b+=1
        diff=0
        for i,a in enumerate(A_tgt):
            if a>=b:
                diff+=(len(A_tgt)-i)*b
                break
            else:
                diff+=2*a-b
        diff-=(N-len(A_tgt))*b
        if diff >max_diff:
            max_diff=diff
        else:
            break
print(sm-max_diff)

### FIXED CODE ###

N=int(input().strip())
A=list(map(int, input().strip().split()))
A_posi=[]
A_nega=[]
for i in range(N):
    A[i]=A[i]-(i+1)
    if A[i]<0:
        A_nega.append(A[i]*(-1))
    elif A[i]>0:
        A_posi.append(A[i])
sm=sum(abs(i) for i in A)

A_tgt=A_nega if len(A_nega)>len(A_posi) else A_posi
A_tgt=sorted(A_tgt)

diff=0
old=0
mindiff=0
for i,a in enumerate(A_tgt):
    if old<a:
        diffdiff=(-i+(len(A_tgt)-i))*(a-old)
    else:
        continue
    if diffdiff<0:
        break
    old=a
    diff = diff+diffdiff
    total_diff=-diff+a*(N-len(A_tgt))
    if total_diff<mindiff:
        mindiff=total_diff
print(sm+mindiff)
### BUGGY CODE ###


a,b = map(int,input().split())
import math
if a==b:
  print(math.factorial(a)**2*2%(10**9+7))
elif abs(a-b)==1:
  print(math.factorial(a)*math.factorial(b))
else:
  print(0)

### FIXED CODE ###


a,b = map(int,input().split())
import math
if a==b:
  print((math.factorial(a)%(10**9+7))**2*2%(10**9+7))
elif abs(a-b)==1:
  print((math.factorial(max(a,b))%(10**9+7))*(math.factorial(min(a,b))%(10**9+7))%(10**9+7))
else:
  print(0)
### BUGGY CODE ###

h,w = map(int,input().split())
s = [list(input()) for _ in range(h)]
u = [[0]*w for _ in range(h)]
d = [[0]*w for _ in range(h)]
l = [[0]*w for _ in range(h)]
r = [[0]*w for _ in range(h)]
for i in range(h):
  l[i][0] = int(s[i][0] != "#")
  for j in range(1,w):
    if s[i][j] == "#":
      l[i][j] = 0
    else:
      l[i][j] = l[i][j-1] + 1
  r[i][w-1] = int(s[i][w-1] != "#")
  for j in range(w-2,-1,-1):
    if s[i][j] == "#":
      r[i][j] = 0
    else:
      r[i][j] = r[i][j+1] + 1 
for i in range(w):
  d[0][i] = int(s[0][i] != "#")
  for j in range(1,h):
    if s[j][i] == "#":
      d[j][i] = 0
    else:
      d[j][i] = d[j-1][i] + 1
  u[h-1][i] = int(s[h-1][i] != "#")
  for j in range(h-2,-1,-1):
    if s[j][i] == "#":
      u[j][i] = 0
    else:
      u[j][i] = u[j+1][i] + 1
ans = 0
for i in range(h):
  for j in range(w):
    cur = l[i][j] + r[i][j] + u[i][j] + d[i][j]
    if cur>ans:
      ans = cur
print(ans - 3)


### FIXED CODE ###

h,w = map(int,input().split())
s = [list(input()) for _ in range(h)]
u = [[0]*w for _ in range(h)]
d = [[0]*w for _ in range(h)]
l = [[0]*w for _ in range(h)]
r = [[0]*w for _ in range(h)]
for i in range(h):
  l[i][0] = int(s[i][0] != "#")
  for j in range(1,w):
    if s[i][j] == "#":
      l[i][j] = 0
    else:
      l[i][j] = l[i][j-1] + 1
  r[i][w-1] = int(s[i][w-1] != "#")
  for j in range(w-2,-1,-1):
    if s[i][j] == "#":
      r[i][j] = 0
    else:
      r[i][j] = r[i][j+1] + 1 
for i in range(w):
  d[0][i] = int(s[0][i] != "#")
  for j in range(1,h):
    if s[j][i] == "#":
      d[j][i] = 0
    else:
      d[j][i] = d[j-1][i] + 1
  u[h-1][i] = int(s[h-1][i] != "#")
  for j in range(h-2,-1,-1):
    if s[j][i] == "#":
      u[j][i] = 0
    else:
      u[j][i] = u[j+1][i] + 1
ans = 0
for i in range(h):
  for j in range(w):
    cur = l[i][j] + r[i][j] + u[i][j] + d[i][j]
    if cur>ans:
      ans = cur
print(ans - 3)
### BUGGY CODE ###

# -*- coding: utf-8 -*-

# スペース区切りの整数の入力
h, w, m = map(int, input().split())

h_list = [0]*h
w_list = [0]*w

h_w_list = [[0 for j in range(w)] for i in range(h)]
# h_w_list = []

for zzz in range(m):
  # print("---")
  bom_h, bom_w = map(int, input().split())
  # print(bom_h, bom_w)
  h_list[bom_h-1] += 1
  w_list[bom_w-1] += 1

  h_w_list[bom_h-1][bom_w-1] = 1
  # h_w_list.append((bom_h, bom_w))

mh = max(h_list)
mw = max(w_list)
h_max_indexs = [i for i, v in enumerate(h_list) if v == mh]
w_max_indexs = [i for i, v in enumerate(w_list) if v == mw]

double_chance = False
# print("---")
for h_index in h_max_indexs:
  if double_chance:
    break
  for w_index in w_max_indexs:
    if double_chance:
      break
    chance = h_w_list[h_index][w_index] != 1

    # print(h_index, w_index, chance)
    if chance:
      double_chance = True


if double_chance:
  result = mh + mw
else:
  result = mh + mw -1

print(result)


### FIXED CODE ###

H,W,M = map(int,input().split())
listh = [0] * H
listw = [0] * W
s = set()
for i in range(M):
    hm,wm = map(int,input().split())
    listh[hm-1] += 1
    listw[wm-1] += 1
    s.add((hm-1,wm-1))
mh = max(listh)
mw = max(listw)
maxh = [i for i,v in enumerate(listh) if v == mh]
maxw = [i for i,v in enumerate(listw) if v == mw]

import sys
for i in maxh:
    for j in maxw:
        if (i,j) not in s:
            print(mh + mw)
            sys.exit()
print(mh + mw - 1)
### BUGGY CODE ###

N = int(input())
P = list(map(int,input().split()))
cnt = 0
for i in range(N):
    part_min = min(P[:i+1])
    if(part_min == P[i]):
        cnt += 1

print(cnt)

### FIXED CODE ###

N = int(input())
P = list(map(int,input().split()))
cnt = 0
min1 = P[0]
for i in range(N):
    if(min1 > P[i]):
        min1 = P[i]
    if(min1 == P[i]):
        cnt += 1
print(cnt)
### BUGGY CODE ###

#!usr/bin/env python3
from collections import defaultdict
from collections import deque
from heapq import heappush, heappop
from functools import reduce
import sys
import math
import bisect
import random
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return list(map(float, sys.stdin.readline().split()))
def LS():return sys.stdin.readline().split()
def SR(n): return [list(sys.stdin.readline())[:-1] for i in range(n)]
def IR(n): return [int(sys.stdin.readline()) for i in range(n)]
def LIR(n): return [list(map(int, sys.stdin.readline().split())) for i in range(n)]
def LSR(n): return [list(map(list, sys.stdin.readline().split())) for i in range(n)]
_gcd = lambda x, y: _gcd(y, x%y) if (x%y) else y
_lcm = lambda x, y: x*y // _gcd(x, y)
def gcd(*numbers):
    return reduce(_gcd, numbers)
def lcm(*numbers):
    return reduce(_lcm, numbers)
sys.setrecursionlimit(1000000)
INF = float('inf')
mod = 1000000007
dire4 = [(1,0), (0,1), (-1,0), (0,-1)]
dire8 = [(1, 0), (1, 1), (0, 1), (-1, 1), (-1, 0), (-1, -1), (0, -1), (1, -1)]

N = I()
A = LI()
A_sum = sum(A)

x = [None]*N

for i in range(N):
    x[i] = 2*(A_sum//2 - sum(A[i%2:i:2]+A[i+1::2]))
print(*x)

### FIXED CODE ###

#!usr/bin/env python3
from collections import defaultdict
from collections import deque
from heapq import heappush, heappop
from functools import reduce
import sys
import math
import bisect
import random
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return list(map(float, sys.stdin.readline().split()))
def LS():return sys.stdin.readline().split()
def SR(n): return [list(sys.stdin.readline())[:-1] for i in range(n)]
def IR(n): return [int(sys.stdin.readline()) for i in range(n)]
def LIR(n): return [list(map(int, sys.stdin.readline().split())) for i in range(n)]
def LSR(n): return [list(map(list, sys.stdin.readline().split())) for i in range(n)]
_gcd = lambda x, y: _gcd(y, x%y) if (x%y) else y
_lcm = lambda x, y: x*y // _gcd(x, y)
def gcd(*numbers):
    return reduce(_gcd, numbers)
def lcm(*numbers):
    return reduce(_lcm, numbers)
sys.setrecursionlimit(1000000)
INF = float('inf')
mod = 1000000007
dire4 = [(1,0), (0,1), (-1,0), (0,-1)]
dire8 = [(1, 0), (1, 1), (0, 1), (-1, 1), (-1, 0), (-1, -1), (0, -1), (1, -1)]

N = I()
A = LI()

A_sum = 0
A_acc_odd = [0]*(N//2+1)
A_acc_even = [0]*(N//2+2)

for i in range(N):
    A_sum += A[i]
    if (i&1):
        A_acc_odd[i//2+1] = A_acc_odd[i//2] + A[i]
    else:
        A_acc_even[i//2+1] = A_acc_even[i//2] + A[i]

x = [None]*N

for i in range(N):
    if (i%2):
        x[i] = A_sum - 2*((A_acc_odd[i//2]-A_acc_odd[0]) + (A_acc_even[-1] - A_acc_even[i//2+1]))
    else:
        x[i] = A_sum - 2*((A_acc_even[i//2]-A_acc_even[0]) + (A_acc_odd[-1] - A_acc_odd[i//2]))
print(*x)
### BUGGY CODE ###

L,A,B,mod=map(int,input().split())

def keta(k):# k-桁の数の初項、末項、項数を求める
    if A>=10**k:
        return 0,0,0
    begin=10**(k-1)
    end=10**k

    if begin>A+B*(L-1):
        return 0,0,0

    sh=A+max(-1,(begin-1-A)//B)*B+B
    ma=min(A+max(0,(end-1-A)//B)*B,A+B*(L-1))
    kou=(ma-sh)//B+1
    
    return sh,ma,kou

def f(n,r): # 1+r+...+r**(n-1)
    if n==1:
        return 1
    if n%2==0:
        return (f(n//2,r) + pow(r,n//2,mod)*f(n//2,r))%mod
    return (r*f(n-1,r)+1)%mod

def g(n,r): # 0+r+2*r**2+...+(n-1)*r**(n-1)
    if n==1:
        return 0
    if n%2==0:
        return g(n//2,r)+pow(r,n//2,mod)*(g(n//2,r)+n//2*f(n//2,r))
    return r*g(n-1,r)+r*f(n-1,r)

keta_count=0
ANS=0
for i in range(18,0,-1):
    sh,ma,kou = keta(i)
    
    if kou<=0:
        continue
    

    #print(i,sh,ma,kou)

    ANS=(pow(10,keta_count,mod)*(ma*f(kou,10**i)-B*g(kou,10**i))+ANS)%mod
    #print(ANS)
    keta_count += kou * i

print(ANS)
    
    


### FIXED CODE ###

L,A,B,mod=map(int,input().split())

def keta(k):# k-桁の数の初項、末項、項数を求める
    if A>=10**k:
        return 0,0,0
    begin=10**(k-1)
    end=10**k

    if begin>A+B*(L-1):
        return 0,0,0

    sh=A+max(-1,(begin-1-A)//B)*B+B
    ma=min(A+max(0,(end-1-A)//B)*B,A+B*(L-1))
    kou=(ma-sh)//B+1
    
    return sh,ma,kou

from functools import lru_cache

@lru_cache(maxsize=None)
def f(n,r): # 1+r+...+r**(n-1)
    if n==1:
        return 1
    if n%2==0:
        return (f(n//2,r) + pow(r,n//2,mod)*f(n//2,r))%mod
    return (r*f(n-1,r)+1)%mod

@lru_cache(maxsize=None)
def g(n,r): # 0+r+2*r**2+...+(n-1)*r**(n-1)
    if n==1:
        return 0
    if n%2==0:
        return g(n//2,r)+pow(r,n//2,mod)*(g(n//2,r)+n//2*f(n//2,r))
    return r*g(n-1,r)+r*f(n-1,r)

keta_count=1
ANS=0
for i in range(18,0,-1):
    sh,ma,kou = keta(i)
    
    if kou<=0:
        continue
    

    #print(i,sh,ma,kou)

    ANS=(keta_count*(ma*f(kou,10**i)-B*g(kou,10**i))+ANS)%mod
    #print(ANS)
    keta_count = keta_count * pow(10,kou * i,mod)

print(ANS)
### BUGGY CODE ###

import sys
import queue
input = sys.stdin.readline
N, Q = map(int, input().split())

tree = [[] for i in range(N+1)]
values = [0] * (N+1)
for _ in range(N-1):
    a, b = map(int, input().split())
    tree[a].append(b)
    tree[b].append(a)

for _ in range(Q):
    p, x = map(int, input().split())
    values[p] += x


q = [1]
while q:
    now = q.pop()
    for next in tree[now]:
        values[next] += values[now]
        q.append(next)


print(" ".join(map(str, values[1:])))


### FIXED CODE ###

import sys
import queue
input = sys.stdin.readline
N, Q = map(int, input().split())

tree = [[] for i in range(N+1)]
values = [0] * (N+1)
visit = [False]*(N+1)
for _ in range(N-1):
    a, b = map(int, input().split())
    tree[a].append(b)
    tree[b].append(a)

for _ in range(Q):
    p, x = map(int, input().split())
    values[p] += x


q = queue.Queue()
q.put(1)
visit[1] = True
while (not q.empty()):
    now = q.get()
    for next in tree[now]:
        if not visit[next]:
            values[next] += values[now]
            visit[next] = True
            q.put(next)

values = values[1:]
print(" ".join(map(str, values)))
### BUGGY CODE ###

N = int(input())
A = tuple(map(int, input().split(" ")))

m = 0
c = 0
for i in range(N):
	if i%2 == 0:
		m += A[i]
		while m <= 0:
			m += 1
			c += 1
	else:
		m += A[i]
		while m >= 0:
			m -= 1
			c += 1

o = 0
d = 0
for i in range(N):
	if i%2 == 1:
		o += A[i]
		while o <= 0:
			o += 1
			d += 1
	else:
		o += A[i]
		while o >= 0:
			o -= 1
			d += 1

print(min(c, d))

### FIXED CODE ###

N = int(input())
A = tuple(map(int, input().split(" ")))

m = 0
c = 0
for i in range(N):
	m += A[i]
	# print(m)
	if i%2 == 0:
		if m <= 0:
			c += abs(m)+1
			m += abs(m)+1
	else:
		if m >= 0:
			c += m+1
			m -= m+1
	# print(m, c)
# print(c)

m = 0
d = 0
for i in range(N):
	m += A[i]
	# print(m)
	if i%2 == 1:
		if m <= 0:
			d += abs(m)+1
			m += abs(m)+1
	else:
		if m >= 0:
			d += m+1
			m -= m+1
	# print(m, d)

print(min(c, d))
### BUGGY CODE ###

n = int(input())
d = list(map(int,input().split()))
k = max(d)
i = 0
j = 0
ans = 0
b = 0
s = 0
while i <= k:
  while j <= n-1:
    if d[j] < i:
      s += 1
    if d[j] >= i:
      b += 1
    j += 1
  if b == s:
    ans += 1
  b = 0
  s = 0
  j = 0
  i += 1
print(ans)
  

### FIXED CODE ###

n = int(input())
d = list(map(int,input().split()))
d.sort()
ans = 0
if n % 2 == 1:
  print(ans)
else:
  ans = d[(n // 2)] - d[(n // 2 - 1)]
  print(ans)
### BUGGY CODE ###

n,m,l=map(int,input().split())
inf=float("inf")
data=[[inf]*n for i in range(n)]
for i in range(m):
    a,b,c=map(int,input().split())
    data[a-1][b-1]=c
    data[b-1][a-1]=c
for i in range(n):
    data[i][i]=0
for k in range(n):
    for i in range(n):
        for j in range(n):
            data[i][j]=min(data[i][j],data[i][k]+data[k][j])
for i in range(n):
    for j in range(n):
        if data[i][j]<=l:
            data[i][j]=1
        else:
            data[i][j]=inf
for i in range(n):
    data[i][i]=0
for k in range(n):
    for i in range(n):
        for j in range(n):
            data[i][j]=min(data[i][j],data[i][k]+data[k][j])
q=int(input())
st=[]
for i in range(q):
    s,t=map(int,input().split())
    st.append([s-1,t-1])
for s,t in st:
    if data[s][t]==inf:
        print(-1)
    else:
        print(data[s][t]-1)

### FIXED CODE ###

def warshal(d):
    n=len(d)
    for k in range(1,n):
        for i in range(1,n):
            for j in range(1,n):
                d[i][j]=min(d[i][j],d[i][k]+d[k][j])
    return d
n,m,l=map(int,input().split())
abc=[list(map(int,input().split())) for i in range(m)]
q=int(input())
st=[list(map(int,input().split())) for i in range(q)]
inf=float("inf")
dp=[[inf]*(n+1) for i in range(n+1)]
for i in range(1,n+1):
    dp[i][i]=0
for u in abc:
    a,b,c=u
    dp[a][b]=c
    dp[b][a]=c
dp=warshal(dp)
data=[[inf]*(n+1) for i in range(n+1)]
for i in range(1,n+1):
    for j in range(1,n+1):
        if 0<dp[i][j]<=l:
            data[i][j]=1
        elif dp[i][j]==0:
            data[i][j]=0
data=warshal(data)
for u in st:
    s,t=u
    if data[s][t]!=inf:
        print(data[s][t]-1)
    else:
        print(-1)
### BUGGY CODE ###

n = int(input())
x = list(map(int, input().split()))
s = sorted(x)
for i in x:
    cp = s.copy()
    del cp[cp.index(i)]
    print(cp[n//2-1])

### FIXED CODE ###

n,*x=map(int, open(0).read().split());xc=sorted(x);
for i in x:print(xc[n//2-(i>(xc[n//2-1]+xc[n//2])/2)])
### BUGGY CODE ###

n,k=map(int,input().split())
A=list(map(int,input().split()))
#dpテーブルの初期化
#最小化問題
dp=[10*18]*n
dp[0]=0

for i in range(1,n):
    tmpmin=9999999999999999999999
    for j in range(k): 
        if i-j-1<0:
            break
        ans=dp[i-j-1]+abs(A[i]-A[i-j-1])
        if tmpmin>ans:
            tmpmin=ans

    dp[i]=tmpmin
print(dp[-1])

### FIXED CODE ###

n,k=map(int,input().split())
A=list(map(int,input().split()))
#dpテーブルの初期化
#最小化問題
dp=[10*18]*n
dp[0]=0

for i in range(1,n):
    tmpmin=9999999999999999999999
    for j in range(k): 
        if i-j-1<0:
            break
        ans=dp[i-j-1]+abs(A[i]-A[i-j-1])
        if tmpmin>ans:
            tmpmin=ans

    dp[i]=tmpmin
print(dp[-1])
### BUGGY CODE ###

N, Q = map(int, input().split())
S = input()

import re
import numpy as np

s = [i.span()[0] for i in list(re.finditer("AC", S))]
#print(s)

count = np.array([0] * (N+1))
for i in range(len(s)):
    count[s[i]+1:] += 1
    
#print(count)

ans = []
for i in range(Q):
    l, r = map(int, input().split())
    #print(S[l-1:r])
    #print(count[r-1], count[l-1])
    ans.append(count[r-1] - count[l-1])

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

### FIXED CODE ###

N, Q = map(int, input().split())
S = input()

import re

s = [i.span()[0] for i in list(re.finditer("AC", S))]
#print(s)

count = [0] * (N+1)
c = 0
for i in range(N):
    try:
        if s[0]+1 == i:
            s.pop(0)
            c += 1
    except:
        pass
            
    count[i] = c
    
#print(count)

ans = []
for i in range(Q):
    l, r = map(int, input().split())
    #print(S[l-1:r])
    #print(count[r-1], count[l-1])
    ans.append(count[r-1] - count[l-1])

print(" ".join(map(str, ans)))
### BUGGY CODE ###

alphabet = ["aa","bb","cc","dd","ee","ff","gg","hh","ii","jj","kk","ll","mm","nn","oo","pp","qq","rr","ss","tt","uu","vv","ww","xx","yy","zz"]
alphabet2 = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
N = int(input())
S = list(input())
import math
i = 0
max = N-2
roop = True
while roop == True:
  if i+1 > len(S)-1:
    roop = False
  elif S[i] == S[i+1]:
    del S[i]
    max -= 1
  else:
    i += 1
print(len(S))

### FIXED CODE ###

N = int(input())
S = list(input())
A = [0] * N
same = False
import math
for i in range(1, N):
  if S[i] == S[i-1]:
    same = True
  elif same and S[i] != S[i-1]:
    A[i] = 1
    same = False
  else:
    same = False
    A[i] = 1
    
print(sum(A)+1)
### BUGGY CODE ###

N=int(input())
src=list(map(int,input().split()))
L=[i+a for i,a in enumerate(src,1)]
R=[i-a for i,a in enumerate(src,1) if 0<=i-a]
ans=0
for l in L:
  for n in range(len(R)):
    if R[n] == l:
      ans+=1
print(ans)

### FIXED CODE ###

from collections import defaultdict
N=int(input())
src=list(map(int,input().split()))
ans=0
d=defaultdict(int)
e=[]
for i,s in enumerate(src,1):
  l=i+s
  r=i-s
  d[l]+=1
  ans+=d[r]

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

import heapq
class pqheap:
    def __init__(self):
        self.p = list()
        self.q = list()
    def insert(self,x):
        heapq.heappush(self.p, x)
        return
    def erase(self,x):
        heapq.heappush(self.q, x)
        return
    def minimum(self):
        while self.q and self.p[0] == self.q[0]:
            heapq.heappop(self.p)
            heapq.heappop(self.q)
        return self.p[0]
#print(a)
def main(a,b):
    for i in range(n):
        if b[i]<=a[i]:
            pass
        else:
            print(-1)
            exit()
    pq=pqheap()
    [pq.insert([-x,i]) for i,x in enumerate(a)]
    ans=0
    while len(pq.p)>len(pq.q):
        m=pq.minimum()
        pq.erase(m)
        v,i=m
        v=-v
        vv=v
        v-=b[i]
        tmp=a[(i-1)%n]+a[(i+1)%n]
        ans+=v//tmp
        v%=tmp
        v+=b[i]
        a[i]=v
        if v==b[i]:continue
        elif vv<=v or v<b[i]:
            print(-1)
            exit()
        pq.insert([-v,i])
    print(ans)
if __name__=='__main__':
    n=int(input())
    b=list(map(int,input().split()))
    a=list(map(int,input().split()))
    main(a,b)


### FIXED CODE ###

def main(n,a,b):
    ans=0
    while True:
        cnt=0
        for i in range(n):
            m=a[(i-1)%n]+a[(i+1)%n]
            if m<a[i] and b[i]<a[i]:
                a[i]-=b[i]
                cnt+=a[i]//m
                a[i]%=m
                a[i]+=b[i]
        if cnt==0:break
        ans+=cnt
    if a==b:
        print(ans)
    else:
        print(-1)
if __name__=='__main__':
    n=int(input())
    b=list(map(int,input().split()))
    a=list(map(int,input().split()))
    main(n,a,b)
### BUGGY CODE ###

import math
N, K = map(int, input().split())
lightPow = list(map(int, input().split()))

for i in range(K):
  newLightPow = [0]*(N+1)
  #print(lightPow)
  for pos in range(1, N+1):
    low = pos - lightPow[pos-1]
    high = pos + lightPow[pos-1]
    low = min(max(1, low), N)
    high = min(max(1, high), N)
    newLightPow[low-1] += 1
    newLightPow[high] -= 1
    #print("pos:"+str(pos))
    #print("low"+str(low)+" high"+str(high))
    #print(newLightPow)
    
  check = True
  for i in range(0, N):
    if (i > 0):
      newLightPow[i] += newLightPow[i-1]
    if (newLightPow[i] < N):
      check = False
  lightPow = newLightPow
  if (check):
    break

print(*lightPow[:-1])

### FIXED CODE ###

import math
N, K = map(int, input().split())
lightPow = list(map(int, input().split()))

for i in range(K):
  newLightPow = [0]*(N+1)
  #print(lightPow)
  for pos in range(1, N+1):
    low = pos - lightPow[pos-1]
    high = pos + lightPow[pos-1]
    low = min(max(1, low), N)
    high = min(max(1, high), N)
    newLightPow[low-1] += 1
    newLightPow[high] -= 1
    #print("pos:"+str(pos))
    #print("low"+str(low)+" high"+str(high))
    #print(newLightPow)
    
  check = True
  for i in range(0, N):
    if (i > 0):
      newLightPow[i] += newLightPow[i-1]
    if (newLightPow[i] < N):
      check = False
  lightPow = newLightPow
  if (check):
    break

print(*lightPow[:-1])
### BUGGY CODE ###

import collections
s = map(int,raw_input())


dp = collections.Counter()
count = 0
for j in range(len(s)):
    ndp = collections.Counter()
    ndp[s[j]] += 1
    for k in dp:
        ndp[(10*k + s[j]) % 2019] += 1
    count += ndp[0]
    dp = ndp

print count




### FIXED CODE ###

import collections
s = map(int,raw_input())

dp = [0] * 2019
count = 0
for j in range(len(s)):
    ndp = [0] * 2019
    ndp[s[j]] += 1
    for k in range(len(dp)):
        ndp[(10*k + s[j]) % 2019] += dp[k]
    count += ndp[0]
    dp = ndp[::]

print count