Harryxun/stf_run huggingface dataset:
N=int(input())
A=[int(input()) for _ in range(N)]
mod=10**9+7
B=[A[0]-1]
for i in range(1,N):
  if A[i]!=A[i-1]:
    B.append(A[i]-1)
n=len(B)
used=[-1]*N
used[B[0]]=0
dp=[0]*n
dp[0]=1
for i in range(1,n):
  if used[B[i]]==-1:
    dp[i]=dp[i-1]
  else:
    a=used[B[i]]
    dp[i]=(dp[i-1]+dp[a])%mod
  used[B[i]]=i
print(dp[-1])

### FIXED CODE ###

N=int(input())
A=[int(input()) for _ in range(N)]
mod=10**9+7
B=[A[0]-1]
for i in range(1,N):
  if A[i]!=A[i-1]:
    B.append(A[i]-1)
n=len(B)
used=[-1]*(max(A)+1)
used[B[0]]=0
dp=[0]*n
dp[0]=1
for i in range(1,n):
  if used[B[i]]==-1:
    dp[i]=dp[i-1]
  else:
    a=used[B[i]]
    dp[i]=(dp[i-1]+dp[a])%mod
  used[B[i]]=i
print(dp[-1])
N = int(input())
A = [int(input()) for _ in range(N)]

A.sort()
if N % 2 == 0:
    print((sum(A[N//2:N]) - sum(A[:N//2]))*2 - (A[N//2+1] - A[N//2]))
else:
    print((sum(A[N//2+1:N]) - sum(A[:N//2]))*2 - min(A[N//2+1] - A[N//2], A[N//2] - A[N//2-1]))

### FIXED CODE ###

N = int(input())
A = []
for i in range(N):
    A.append(int(input()))

A.sort()

if N % 2 == 1:
    w = -2*sum(A[:N//2]) +A[N//2] +A[N//2 + 1] + 2*sum(A[N//2 + 2:])
    m = -2*sum(A[:N//2-1]) - A[N//2 - 1] - A[N//2] + 2*sum(A[N//2+1:])
    print(max(w, m))
else:
    print(-2*sum(A[:N//2-1]) - A[N//2-1] + A[N//2] + 2*sum(A[N//2+1:]))
n = int(input())
for i in range(n):
    t, x, y = map(int, input().split())

    if (t + x + y) % 2 == 1 or (x + y) > t:
        print("No")
        exit()

print("Yes")

### FIXED CODE ###

a, b = map(int, input().split())
print("Odd") if (a * b) % 2 == 1 else print("Even")
import collections
def factorization(n):
    arr = []
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])

    if temp!=1:
        arr.append([temp, 1])

    if arr==[]:
        arr.append([n, 1])

    return arr

n = int(input())
if n == 1:
    print(0)
else:
    ans = 0
    c = factorization(n)
    for arr in c:
        m = arr[1]
        i = 1
        for _ in range(m):
            if i > m:
                break
            ans += 1
            m -= i
            i += 1
print(ans)

### FIXED CODE ###

import collections
def factorization(n):
    arr = []
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])

    if temp!=1:
        arr.append([temp, 1])

    if arr==[]:
        arr.append([n, 1])

    return arr

n = int(input())
if n == 1:
    print(0)
else:
    ans = 0
    c = factorization(n)
    for arr in c:
        m = arr[1]
        i = 1
        for _ in range(m):
            if i > m:
                break
            ans += 1
            m -= i
            i += 1
    print(ans)
N = int(input())
List = list(map(int, input().split()))
mid = 0
res = 0
for i in range(N):
  for i range(i+1,N):
    mid = abs(List[i]-List[j])
    res = max(res,mid)
print(res)

### FIXED CODE ###

N = int(input())
List = list(map(int, input().split()))
mid = 0
res = 0
for i in range(N):
  for j in range(i+1,N):
    mid = abs(List[i]-List[j])
    res = max(res,mid)
print(res)
N, M = map(int, input().split())
A = sorted(list(map(int, input().split())))
L = [tuple(map(int, input().split())) for _ in range(M)]

L.sort(key=lambda x: x[1], reverse=True)

flag = True
num = 0
now = 0
while flag:
    if num >= M:
        break
    for i in range(L[num][0]):
        if now <= N and L[num][1] > A[now]:
            A[now] = L[num][1]
            now += 1
        else:
            flag = False
            break
    num += 1
print(sum(A))



### FIXED CODE ###

N, M = map(int, input().split())
A = sorted(list(map(int, input().split())))
L = [tuple(map(int, input().split())) for _ in range(M)]

L.sort(key=lambda x: x[1], reverse=True)

flag = True
num = 0
now = 0
while flag:
    if num >= M:
        break
    for i in range(L[num][0]):
        if now < N and L[num][1] > A[now]:
            A[now] = L[num][1]
            now += 1
        else:
            flag = False
            break
    num += 1
print(sum(A))
import fractions

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

def lcm(x, y):
    return (x * y) // fractions.gcd(x, y)
  
def kn(h):
  l=0
  while h%2==0:
    h=h//2
    l+=1
  return l
  
k=1
flag=kn(A[0])
for a in A:
  k=lcm(k,a)
  if flag != kn(a):
    print(0);exit()

k/=2
  
if k==1:
  k=3
print(int(M//k//2+M//k%2))



### FIXED CODE ###

import fractions

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

def lcm(x, y):
    return (x * y) // fractions.gcd(x, y)
  
def kn(h):
  l=0
  while h%2==0:
    h=h//2
    l+=1
  return l
  
k=1
flag=kn(A[0]//2)
for a in A:
  a//=2
  k=lcm(k,a)
  if flag != kn(a):
    print(0);exit()
  
print(int(M//k//2+M//k%2))
from numpy as np
N,W = map(int,input().split())
ndp = np.zeros(W+1,dtype= np.int64)
for _ in range(N):
    w,v = map(int,input().split())
    np.maximum(ndp[:-w] + v, ndp[w:], out = ndp[w:])
print(ndp[-1])


### FIXED CODE ###

n,W = map(int,input().split())
w,v = [0] * n ,[0] * n
for i in range(n):
    w[i] ,v[i] = map(int,input().split())

import numpy as np
ndp = np.zeros(W+1,dtype= np.int64)
for w,v in zip(w,v):
    np.maximum(ndp[:-w] + v, ndp[w:], out = ndp[w:])
print(ndp[-1])
import numpy as np
h, w = map(int,input().split())
f = lambda:list(map(str,input().split()))
g = []
for i in range(h):
  li = f()
  g.append(li)
#print(g)
dp = np.zeros((h,w))
#print(g[1][0] == '.')
#print(g[1][0])
#print(g[0][3])
for i in range(1,h):
  for j in range(1,w):
    if g[i-1][j] == '.' and g[i][j] != '#':
      if dp[i-1][j] == 0:
        dp[i][j] += 1
      else:
        dp[i][j] += dp[i-1][j]
    if g[i][j-1] == '.' and g[i][j] != '#':
      if dp[i][j-1] == 0:
        dp[i][j] += 1
      else:
        dp[i][j] += dp[i][j-1]
#print(dp)
ans = int(dp[-1][-1])
print(ans%(10**9+7))

### FIXED CODE ###

h, w = map(int,input().split())
g = [list(input()) for _ in range(h)]
#print(g)
dp = [[0]*w for _ in range(h)]
dp[0][0] = 1
#print(g[1][0] == '.')
#print(g[1][0])
#print(g[0][3])
mod = 10**9+7
for i in range(h):
  for j in range(w):
    if i+1<h and g[i+1][j] == '.':
      dp[i+1][j] = (dp[i+1][j] + dp[i][j])%mod
    if j+1<w and g[i][j+1] == '.':
      dp[i][j+1] = (dp[i][j+1] + dp[i][j])%mod
print(dp[-1][-1])
N,M=map(int,input().split())
G=[[] for _ in range(N)]
for _ in  range(M):
    xi,yi=map(int,input().split())
    G[xi-1].append(yi-1)

dp=[-1]*N #各ノードを始点とした時の最長経路

def rec(v):
    if dp[v]!=-1:
        return dp[v]
    
    res=0

    for nv in G[v]:
        res=max(res,rec(nv)+1)
    
    dp[v]=res
    return res

ans=0
for v in range(N):
    ans=max(ans,rec(v))
print(ans)


### FIXED CODE ###

import sys
sys.setrecursionlimit(10**5+100)

N,M=map(int,input().split())
G=[[] for _ in range(N)]
for _ in  range(M):
    xi,yi=map(int,input().split())
    G[xi-1].append(yi-1)

dp=[-1]*N #各ノードを始点とした時の最長経路

def rec(v):
    if dp[v]!=-1:
        return dp[v]
    
    res=0

    for nv in G[v]:
        res=max(res,rec(nv)+1)
    
    dp[v]=res
    return res

ans=0
for v in range(N):
    ans=max(ans,rec(v))
print(ans)
n = int(input())
a = list(map(int, input().split()))
s = 1
if 0 in a:
  print(0)
for i in a:
  if 
for i in a:
  if i >= 10 ** 8:
    print(-1)
    break
  s *= i
  if s >= 10 ** 8:
    print(-1)
    break
else:
  print(s)
  

### FIXED CODE ###

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

ans = 1
for i in a :
  ans *= i
  if ans > 10**18 :
    ans = -1
    break
if 0 in a :
  ans = 0

print(ans)
n, q = map(int, input().split())
ab = [list(map(int, input().split())) for _ in range(n-1)]
px = [list(map(int, input().split())) for _ in range(q)]

cnt = [0 for _ in range(n+1)]
for p, x in px:
    cnt[p] += x

edge = [[] for _ in range(n+1)]
for a, b in ab:
    edge[a].append(b)
    edge[b].append(a)


def dfs(now, bef):
    for nxt in edge[now]:
        if nxt != bef:
            cnt[nxt] += cnt[now]
            dfs(nxt, now)


dfs(1, 0)
print(*cnt[1:])


### FIXED CODE ###

import sys
sys.setrecursionlimit(10**7)


def input(): return sys.stdin.readline()


N, Q = map(int, input().split())
ab = [[] for _ in range(N)]
for i in range(N-1):
  a, b = map(int, input().split())
  ab[a-1].append(b)
  ab[b-1].append(a)

P = [0 for _ in range(N)]
for i in range(Q):
  p, x = map(int, input().split())
  P[p-1] += x


def dfs(p, par):
  for i in ab[p-1]:
    if i != par:
      P[i-1] += P[p-1]
      dfs(i, p)


dfs(1, -12345)
print(" ".join(map(str, P)))
a = int(input("aを入力： "))
b = int(input("bを入力： "))


if (a * b) % 2 == 0:
  print("Even")
else:
  print("Odd")


### FIXED CODE ###

a, b = map(int, input().split())
if (a*b) % 2:
    print("Odd")
else:
    print("Even")
x, k, d = map(int, input().split())

pm = x // abs(x)
left = k - (abs(x) // d)

if abs(x) // d > k:
    print(abs(x) - k*d)
else:
    ans_abs = abs(x) % d
    if left % 2 == 0:
        print(ans_abs)
    else:
        print(d - ans_abs)


### FIXED CODE ###

x, k, d = map(int, input().split())

left = k - (abs(x) // d)

if abs(x) // d > k:
    print(abs(x) - k*d)
else:
    ans_abs = abs(x) % d
    if left % 2 == 0:
        print(ans_abs)
    else:
        print(d - ans_abs)
data =input()
data = list(data)
deter =""


if len(data) >9 :
  print("NO")
if len(data) >=5 and len(data)<=9:
  if data[0] !="A":
    data.insert(0,"A")
  if data[4] !="A":
    data.insert(4,"A")
  if data[6] !="A":
    data.insert(6,"A")
  if len(data) ==8:
    data.append("A")
  else:
    if data[8] !="A":
      data.insert(8,"A")
 
  for s in range(len(data)):
    deter +=data[s]
   
  if deter =="AKIHABARA":
    print("YES")
  else:
    print("NO")

 
if len(data) <=4:
  print("NO")


### FIXED CODE ###

data =input()
data = list(data)
deter =""
cnt2 =0
cnt =[0]*5
cnt3 =0
for t in range(len(data)):
  if data[t] =="I":
    cnt[0] +=1
  if data[t] =="K":
    cnt[1] +=1
  if data[t] =="H":
    cnt[2] +=1
  if data[t] =="B":
    cnt[3] +=1
  if data[t] =="R":
    cnt[4] +=1
  
if cnt[0] ==1 and cnt[1] ==1 and cnt[2] ==1 and cnt[3] ==1 and cnt[4] ==1:
  cnt2 +=1 

if len(data) >9 or cnt2 ==0 :
  print("NO")
  cnt3 +=1
if len(data) >=5 and len(data)<=9  and cnt2 ==1:
  if data[0] !="A":
    data.insert(0,"A")
  if data[4] !="A":
    data.insert(4,"A")
  if data[6] !="A":
    data.insert(6,"A")
  if len(data) ==8:
    data.append("A")
  else:
    if data[8] !="A":
      data.insert(8,"A")
 
  for s in range(len(data)):
    deter +=data[s]
  
  if deter =="AKIHABARA":
    print("YES")
  else:
    print("NO")

 
if len(data) <=4 and cnt3==0:
  print("NO")
import math

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

n = math.gcd(a, b)

cd = []
for i in range(1, math.ceil(math.sqrt(n) + 1)):
    if n % i == 0:
        if n // i == i:
            cd.append(i)
        else:
            cd.append(i)
            cd.append(n // i)

cd.sort()

ans = 0
for i in range(len(cd)):
    for j in range(i + 1):
        if j == i:
            continue
        if cd[j] > 1 and cd[i] % cd[j] == 0:
            break
    else:
        ans += 1
print(ans)

### FIXED CODE ###

import math
import fractions

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

n = fractions.gcd(a, b)

cd = []
for i in range(1, math.ceil(math.sqrt(n) + 1)):
    if n % i == 0:
        if n // i == i:
            cd.append(i)
        else:
            cd.append(i)
            cd.append(n // i)

cd.sort()

ans = 0
for i in range(len(cd)):
    for j in range(i + 1):
        if j == i:
            continue
        if cd[j] > 1 and cd[i] % cd[j] == 0:
            break
    else:
        ans += 1
print(ans)
from collections import deque

N, K = map(int, input().split())
S = [int(x) for x in input()]

count = 0
flag = True

la = deque([])
for c in S:
    if int(flag) == c:
        count += 1
    else:
        la.append(count)
        count = 1
        flag = not flag

la.append(count)

print(la)

ltmp = deque([])
sum_la = 0
for _ in range((K-1)*2 + 1):
    tmp = la.popleft()
    sum_la += tmp
    ltmp.append(tmp)

last_a = [sum_la]
while len(la) > 0 :
    tmp = la.popleft()
    sum_la += tmp
    ltmp.append(tmp)
    if len(la) > 0:
        tmp = la.popleft()
        sum_la += tmp
        ltmp.append(tmp)

    last_a.append(sum_la)

    if len(ltmp) > 0:
        tmp = ltmp.popleft()
        sum_la -= tmp
    if len(ltmp) > 0:
        tmp = ltmp.popleft()
        sum_la -= tmp
    last_a.append(sum_la)

# for i in range(K, len(l) - K, 2):
#     last_a.append(sum(l[i-K:i+K+1]))

# last_b = []
# K = K-1
# for i in range(K, len(l) - K, 2):
#     last_b.append(sum(l[i-K:i+K+1]))

print(max(last_a))
# for i in range(len(l)):
#     l = 



### FIXED CODE ###

from collections import deque

N, K = map(int, input().split())
S = [int(x) for x in input()]

count = 0
flag = True

la = deque([])
for c in S:
    if int(flag) == c:
        count += 1
    else:
        la.append(count)
        count = 1
        flag = not flag

la.append(count)

if K >= (len(la) / 2):
    print(N)
    exit()

ltmp = deque([])
sum_la = 0
for _ in range((K-1)*2 + 1):
    tmp = la.popleft()
    sum_la += tmp
    ltmp.append(tmp)

last_a = [sum_la]
while len(la) > 0 :
    tmp = la.popleft()
    sum_la += tmp
    ltmp.append(tmp)
    if len(la) > 0:
        tmp = la.popleft()
        sum_la += tmp
        ltmp.append(tmp)

    last_a.append(sum_la)

    if len(ltmp) > 0:
        tmp = ltmp.popleft()
        sum_la -= tmp
    if len(ltmp) > 0:
        tmp = ltmp.popleft()
        sum_la -= tmp
    last_a.append(sum_la)

print(max(last_a))
a = int(input())
b = int(input())
c = int(input())

if c > a+b:
    print('No')
else:
    print('Yes')


### FIXED CODE ###

a = [int(i) for i in input().split()]

if a[2] > a[0]+a[1]:
    print('No')
else:
    print('Yes')
# -*- coding: utf-8 -*-
n,m = map(int, input().split())
i=0
lst = []
while i < m: 
    lst.append(list(map(int, input().split())) + [i])
    i+=1
lst = sorted(lst)
j=1

i=1
for k in lst:
    if i != k[0]:
        i==k[0]
        j=1
        k[1]=i*1000000+j
    else:
        j+=1
        k[1]=i*1000000+j

#ans
for ans in sorted(ll, key=lambda x:x[2]):
    print('{0:012d}'.format(ans[1]))

### FIXED CODE ###

# -*- coding: utf-8 -*-
n,m = map(int, input().split())
i=0
lst = []
while i < m: 
    lst.append(list(map(int, input().split())) + [i])
    i+=1
lst = sorted(lst)
j=0
i=1
for k in lst:
    if i != k[0]:
        i=k[0]
        j=1
        k[1]=i*1000000+j
    else:
        j+=1
        k[1]=i*1000000+j

#ans
for ans in sorted(lst, key=lambda x:x[2]):
    print('{0:012d}'.format(ans[1]))
l=list(input())
N=int(l[0])
A=int(l[1])

B=int(l[2])
syou=N//(A+B)
amari=N%(A+B)
kotae=syou*A+amari
print(kotae)


### FIXED CODE ###

l=list(input().split())
N=int(l[0])
A=int(l[1])

B=int(l[2])
syou=N//(A+B)
amari=N%(A+B)
kotae=syou*A+min(amari,A)
print(kotae)
A=int(input())
B=list(map(int,input().split()))
a=0
S=0
for i in range(len(B)):
    S+=abs(B[i]-a)
    a=B[i]
S+=abs(B[-1])
for j in range(len(B)):
    if j=0:
        if 0<=B[0]<=B[1] or 0>=B[0]>=B[1]:
            print(S)
        elif B[0]<=0<=B[1] or B[0]>=0>=B[1]:
            print(S-abs(B[0]))
        else:
            print(S-abs(B[1]-B[0]))
    elif j=len(B)-1:
        if 0<=B[-1]<=B[-2] or 0>=B[-1]>=B[-2]:
            print(S)
        elif B[-1]<=0<=B[-2] or B[-1]>=0>=B[-2]:
            print(S-abs(B[-1]))
        else:
            print(S-abs(B[-1]-B[-2]))
    else:
        if B[j-1]<=B[j]<=B[j+1] or B[j-1]>=B[j]>=B[j+1]:
            print(S)
        elif B[j]<=B[j-1]<=B[j+1] or B[j]>=B[j-1]>=B[j+1]:
            print(S-abs(B[j-1]-B[j]))
        else:
            print(S-abs(B[j+1]-B[j]))

### FIXED CODE ###

A=int(input())
B=list(map(int,input().split()))
a=0
S=0
for i in range(len(B)):
    S+=abs(B[i]-a)
    a=B[i]
S+=abs(B[-1])
for j in range(len(B)):
    if j==0:
        if 0<=B[0]<=B[1] or 0>=B[0]>=B[1]:
            print(S)
        elif B[0]<=0<=B[1] or B[0]>=0>=B[1]:
            print(S-2*abs(B[0]))
        else:
            print(S-2*abs(B[1]-B[0]))
    elif j==len(B)-1:
        if 0<=B[-1]<=B[-2] or 0>=B[-1]>=B[-2]:
            print(S)
        elif B[-1]<=0<=B[-2] or B[-1]>=0>=B[-2]:
            print(S-2*abs(B[-1]))
        else:
            print(S-2*abs(B[-1]-B[-2]))
    else:
        if B[j-1]<=B[j]<=B[j+1] or B[j-1]>=B[j]>=B[j+1]:
            print(S)
        elif B[j]<=B[j-1]<=B[j+1] or B[j]>=B[j-1]>=B[j+1]:
            print(S-2*abs(B[j-1]-B[j]))
        else:
            print(S-2*abs(B[j+1]-B[j]))
# coding: utf-8
# Your code here!

import fractions
import sys

N, M = map(int, input().rstrip().split(' '))
S = [x for x in input()]
T = [x for x in input()]

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

L = lcm(N, M)

dp = [-1] * (L + 10)
for i, s in enumerate(S):
    dp[i*L//N] = s
   
for i, t in enumerate(T):
    if dp[i*L//M] != -1:
        if dp[i*L//M] != t:
            print(-1)
            sys.exit()
print(L)


### FIXED CODE ###

# coding: utf-8
# Your code here!

import fractions
import sys
from collections import defaultdict

N, M = map(int, input().rstrip().split(' '))
S = [x for x in input()]
T = [x for x in input()]

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

L = lcm(N, M)

dp = defaultdict(lambda: -1)

for i, s in enumerate(S):
    dp[i*L//N] = s

for i, t in enumerate(T):
    if dp[i*L//M] != -1:
        if dp[i*L//M] != t:
            print(-1)
            sys.exit()
print(L)
n = int(input())
a = []
for i in n:
    x,y = map(int,input().split())
    a.append([x,y])
count = 0
flag = True
for x in a:
    if x[0] == x[1]:
        count += 1
        if count == 3:
            print('Yes')
            flag = False
            break
    else:
        count = 0

if flag:
    print('No')

### FIXED CODE ###

n = int(input())
a = []
for i in range(n):
    x,y = map(int,input().split())
    a.append([x,y])
count = 0
flag = True
for x in a:
    if x[0] == x[1]:
        count += 1
        if count == 3:
            print('Yes')
            flag = False
            break
    else:
        count = 0

if flag:
    print('No')
li = [list(map(int, input().split())) for _ in range(3)]
sum1 = li[0][0] + li[1][1] + li[2][2]
sum2 = li[1][0] + li[2][1] + li[0][2]
sum3 = li[2][0] + li[3][1] + li[1][2]
if sum1 ==sum2 and sum2 == sum3:
    print("Yes")
else:
    print("No")

### FIXED CODE ###


li = [list(map(int, input().split())) for _ in range(3)]
sum1 = li[0][0] + li[1][1] + li[2][2]
sum2 = li[1][0] + li[2][1] + li[0][2]
sum3 = li[2][0] + li[0][1] + li[1][2]
if sum1 ==sum2 and sum2 == sum3:
    print("Yes")
else:
    print("No")
N,K = map(int, input().split())
h = list(map(int, input().split()))

dp = [0] * N
for i in range(min(N,K)):
    dp[i] = abs(h[i]-h[0])

for i in range(K,N):
    dp[i] = dp[i-1] + abs(h[i]-h[i-1])
    dp[i] = min(dp[i-k] + abs(H[i]-H[i-k]) for k in range(1,K+1))

answer = dp[-1]
print(answer)

### FIXED CODE ###

N,K = map(int, input().split())
h = list(map(int, input().split()))

dp = [0] * N
for i in range(min(N,K)):
    dp[i] = abs(h[i]-h[0])

for i in range(K,N):
    dp[i] = dp[i-1] + abs(h[i]-h[i-1])
    for j in range(2,K+1):
        dp[i] = min(dp[i-j] + abs(h[i]-h[i-j]),dp[i])

answer = dp[-1]
print(answer)
"""
あなたは、X 円を持ってケーキとドーナツを買いに出かけました。
あなたはまずケーキ屋で 1 個 A 円のケーキを 1 個買いました。 次に、ドーナツ屋で 1 個 B 円のドーナツをできるだけたくさん買いました。
これらの買い物のあと手元に残っている金額は何円ですか。
"""

def buying_sweets(money,p_cake,p_dounuts):
    t_money  = money - p_cake
    c_dounuts = t_money // p_dounuts
    p_after_money = t_money - (c_dounuts * p_dounuts)
    return p_after_money

N = int(input())
a = []
for i in range(N):
    a.append(int(input()))

money = a[1]
p_cake = a[2]
p_dounuts = a[3]
print(buying_sweets(money,p_cake,p_dounuts))


### FIXED CODE ###

"""
あなたは、X 円を持ってケーキとドーナツを買いに出かけました。
あなたはまずケーキ屋で 1 個 A 円のケーキを 1 個買いました。 次に、ドーナツ屋で 1 個 B 円のドーナツをできるだけたくさん買いました。
これらの買い物のあと手元に残っている金額は何円ですか。
"""

def buying_sweets(money,p_cake,p_dounuts):
    t_money  = money - p_cake
    c_dounuts = t_money // p_dounuts
    p_after_money = t_money - (c_dounuts * p_dounuts)
    return p_after_money

money = int(input())
p_cake = int(input())
p_dounuts = int(input())
print(buying_sweets(money,p_cake,p_dounuts))
#!/usr/bin/env python3

import numpy as np

# line1 = "2 3"
# line2 = ['1 32', '2  63', '1 12']

N, M = map(int,  input().split())
prefinfo = [input() for i in range(N)]
PY = [list(map(int, line.split())) for line in prefinfo]

PY = np.array(PY)
cn = np.array([np.arange(np.shape(PY)[0])])
cc = np.array([np.zeros(np.shape(PY)[0], dtype=int)])

city_list = np.hstack([cn.T, PY, cc.T])
cl_ysort = city_list[np.argsort(city_list[:, 2])]
city_count = np.zeros(N+1, dtype=int)
for i, cinfo in enumerate(cl_ysort):
    pref = cinfo[1]
    city_count[pref] += 1
    cl_ysort[i, 3] = city_count[pref]

cl_idsort = cl_ysort[np.argsort(cl_ysort[:, 0])]

[print('{:06d}{:06d}'.format(cl[1], cl[3])) for cl in cl_idsort]


### FIXED CODE ###

#!/usr/bin/env python3

import numpy as np

# line1 = "2 3"
# line2 = ['1 32', '2  63', '1 12']

N, M = map(int,  input().split())
prefinfo = [input() for i in range(M)]
PY = [list(map(int, line.split())) for line in prefinfo]

PY = np.array(PY)
cn = np.array([np.arange(np.shape(PY)[0])])
cc = np.array([np.zeros(np.shape(PY)[0], dtype=int)])

city_list = np.hstack([cn.T, PY, cc.T])
cl_ysort = city_list[np.argsort(city_list[:, 2])]
city_count = np.zeros(N+1, dtype=int)
for i, cinfo in enumerate(cl_ysort):
    pref = cinfo[1]
    city_count[pref] += 1
    cl_ysort[i, 3] = city_count[pref]

cl_idsort = cl_ysort[np.argsort(cl_ysort[:, 0])]

[print('{:06d}{:06d}'.format(cl[1], cl[3])) for cl in cl_idsort]
A, B, N = map(int,input().split())

max - int(a*min(B-1,N)/B)
print(max)
~             

### FIXED CODE ###

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

max = int(A*min(B-1,N)/B)
print(max)
a,b,c = map(int,raw_input().split())
if b-a==c-b:
  print "YES"
else:
  ptint"NO"

### FIXED CODE ###

a,b,c=map(int,raw_input().split())
if b-a==c-b:
  print "YES"
else:
  print"NO"
= int(input())
h = list(map(int, input().split()))

ans = 0
cnt = 0

for i in range(1, max(h) + 1)[::-1]:
    cnt = 0
    for j in range(n):
        if h[j] == i:
            h[j] -= 1
            cnt += 1
            if j + 1 < n:
                if h[j + 1] == i:
                    cnt -= 1
    ans += cnt

print(ans)

### FIXED CODE ###

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

ans = 0
cnt = 0

for i in range(1, max(h) + 1)[::-1]:
    cnt = 0
    for j in range(n):
        if h[j] == i:
            h[j] -= 1
            cnt += 1
            if j + 1 < n:
                if h[j + 1] == i:
                    cnt -= 1
    ans += cnt

print(ans)
s=input()
ans='AC'
if s[0]!='A':
  ans='WA'
elif s[2:-1].count('C')!=1:
  ans='WA'
s=sorted(s)
if s[2:].islower()==False:
  ans='WA'
print(ans)

### FIXED CODE ###

s=input()
ans='AC'
if s[0]!='A':
  ans='WA'
s=s[1:]
if s[1:-1].count('C')!=1:
  ans='WA'
s=s.replace('C','c')
for i in s:
  if i.islower()==False:
    ans='WA'
    break
print(ans)
input()
data = [int(i) for i in input().split()]
print(min(data), max(data), sum(data))
~                                      

### FIXED CODE ###

input()
data = [int(i) for i in input().split()]
print(min(data), max(data), sum(data))
x, n = map(int, input().split())
if n == 0:
  print(x)
else:
  list_ = list(map(int, input().split()))

  all_list = list(range(1,101))
  for i in list_:
    all_list.remove(i)

  left = 0
  right = len(all_list)-1

  while left<right:
    mid = (left + right) // 2
    if x < all_list[mid]:
      right = mid
    else:
      left = mid+1
  
  small = all_list[left-1]
  big = all_list[right]

  if abs(small-x)<abs(big-x):
    print(small)
  elif abs(small-x)>abs(big-x):
    print(big)
  else:
    print(small)

### FIXED CODE ###

x, n = map(int, input().split())
if n == 0:
  print(x)
else:
  list_ = list(map(int, input().split()))

  diff = 0
  while True:
    if x-diff not in list_:
      print(x-diff)
      break
    if x+diff not in list_:
      print(x+diff)
      break
    diff+=1
a = list(input())
b = []
for i in range(a):
  if i % 2 == 0:
    b.append(a[i])
print("".join(b))
  

### FIXED CODE ###

temp = input().split(" ")
mojis = list(temp[0])
ans = ""
for a in range(len(mojis)):
    if a % 2 == 0:
        ans = ans + mojis[a]
print(ans)