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

n = int(input())
numbers = input()

lst = []
lst2 = []
lst3 = []
for i in range(n):
  pin = ''
  if numbers[i] not in lst:
    pin += numbers[i]
    lst.append(pin)
    for j in range(i+1, n):
      pin += numbers[j]
      if pin not in lst2:
        lst2.append(pin)
        for k in range(j+1, n):
          pin += numbers[k]
          if pin not in lst3:
            lst3.append(pin)
          pin = pin[0] + pin[1]
      pin = pin[0]
print(len(lst3))


### FIXED CODE ###

n = int(input())
numbers = input()

lst = []
ans = []
for i in range(n):
  pin = ''
  if numbers[i] not in lst:
    pin += numbers[i]
    lst.append(pin)
    lst2 = []
    for j in range(i+1, n):
      pin += numbers[j]
      if pin[1] not in lst2:
        lst2.append(pin[1])
        lst3 = []
        for k in range(j+1, n):
          pin += numbers[k]
          if pin[2] not in lst3:
            lst3.append(pin[2])
            ans.append(pin)
          if ('0' in lst3) and ('1' in lst3) and ('2' in lst3) and ('3' in lst3) and ('4' in lst3) and ('5' in lst3) and ('6' in lst3) and ('7' in lst3) and ('8' in lst3) and ('9' in lst3):
            break
          pin = pin[0] + pin[1]
      if ('0' in lst2) and ('1' in lst2) and ('2' in lst2) and ('3' in lst2) and ('4' in lst2) and ('5' in lst2) and ('6' in lst2) and ('7' in lst2) and ('8' in lst2) and ('9' in lst2):
        break
      pin = pin[0]
    if ('0' in lst) and ('1' in lst) and ('2' in lst) and ('3' in lst) and ('4' in lst) and ('5' in lst) and ('6' in lst) and ('7' in lst) and ('8' in lst) and ('9' in lst):
      break
print(len(ans))
### BUGGY CODE ###

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

sign = list(range(1,N+1))

for i in range(N):
  sign[i] += A[i]

count = 0
for i in range(1,N):
  temp = i+1-A[i]
  for j in range(i):
    if sign[j]==temp:count+=1

print(count)

### FIXED CODE ###

from collections import defaultdict

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

'''
方針:
- 各A_i,(i<h)ごとにf(h,j)=A_h+A_j-|h-j|の値がf(i,j)に比べてどれだけ変化するかを計算し、
リストに格納(①)
- 各要素A_k,(j<k)ごとにf(i,k)=A_i+A_k-|i-k|の値がf(i,j)に比べてどれだけ変化するかを
計算し、カウントをとる(②)
- 再度ループを回して①と②を照合し、値が一致する組数をansに加算
'''

ans=0
diff_list=[] #①照合用の差分リスト
count=defaultdict(int) #②各要素がどれだけはみ出ているかのカウント
#前処理として、最初のループで①と②を作成
for i in range(1,N):
  if i == A[0]+A[i]:
    ans += 1
  d1 = A[i]-A[0]
  d2 = i
  diff_list.append(d1+d2)
  
  count[A[0]+A[i]-i] += 1

for i in range(N-1):
  count[A[0]+A[i+1]-(i+1)] -= 1 #その要素自身を忘れずに引く
  d = diff_list[i]
  ans += count[-d]
  
print(ans)
### BUGGY CODE ###

H, W, D = map(int,input().split())
A = [list(map(int,input().split())) for _ in range(H)]
Q = int(input())
LR = [list(map(int,input().split())) for _ in range(Q)]

number_list = [[] for _ in range(H*W+1)]
for h in range(H):
    for w in range(W):
        number_list[A[h][w]] = [h, w]

for l, r in LR:
    cnt = 0
    while l != r:
        x, y = number_list[l]
        l += D
        nx, ny = number_list[l]
        cnt += (abs(x-nx) + abs(ny - y))
    print(cnt)


### FIXED CODE ###

H, W, D = map(int,input().split())
A = [list(map(int,input().split())) for _ in range(H)]
Q = int(input())
LR = [list(map(int,input().split())) for _ in range(Q)]

number_list = [[0] * 2 for _ in range(H*W+1)]
for h in range(H):
    for w in range(W):
        number_list[A[h][w]] = [h, w]

d = [0] * (H*W+1)
for idx in range(H*W+1):
    pre_idx = idx - D
    if pre_idx <= 0:
        continue
    diff = abs(number_list[idx][0] - number_list[pre_idx][0])
    diff += abs(number_list[idx][1] - number_list[pre_idx][1])
    d[idx] = d[pre_idx] + diff

for l, r in LR:
    cnt = 0
    print(d[r] - d[l])
### BUGGY CODE ###

import bisect
import copy
import heapq
import sys
import itertools
import queue

input = sys.stdin.readline
sys.setrecursionlimit(100000)
# mod = 10 ** 9 + 7
mod = 998244353


def read_values():
    return map(int, input().split())


def read_index():
    return map(lambda x: int(x) - 1, input().split())


def read_list():
    return list(read_values())


def read_lists(N):
    return [read_list() for n in range(N)]


class V:
    def __init__(self, f, v=None):
        self.f = f
        self.v = v

    def __str__(self):
        return str(self.v)

    def ud(self, n):
        if n is None:
            return

        if self.v is None:
            self.v = n
            return
        self.v = self.f(self.v, n)


def main():
    N, S = read_values()
    A = read_list()

    dp = [[[0 for _ in range(3)] for _ in range(S + 1)] for _ in range(N + 1)]
    dp[0][0][0] = 1

    for i, a in enumerate(A):
        for s in range(S + 1):
            dp[i + 1][s][0] += dp[i][s][0]
            dp[i + 1][s][1] += (
                dp[i][s][1]
                + dp[i][s][0]
                + (0 if s - a < 0 else dp[i][s - a][0] + dp[i][s - a][1])
            )
            dp[i + 1][s][2] += (
                dp[i][s][2]
                + dp[i][s][1]
                + dp[i][s][0]
                + (0 if s - a < 0 else dp[i][s - a][1] + dp[i][s - a][0])
            )

            dp[i + 1][s][0] %= mod
            dp[i + 1][s][1] %= mod
            dp[i + 1][s][2] %= mod

    print(dp[N][S][2])


if __name__ == "__main__":
    main()


### FIXED CODE ###

import sys

input = sys.stdin.readline
sys.setrecursionlimit(100000)
# mod = 10 ** 9 + 7
mod = 998244353


def read_values():
    return map(int, input().split())


def read_index():
    return map(lambda x: int(x) - 1, input().split())


def read_list():
    return list(read_values())


def read_lists(N):
    return [read_list() for n in range(N)]


class V:
    def __init__(self, f, v=None):
        self.f = f
        self.v = v

    def __str__(self):
        return str(self.v)

    def ud(self, n):
        if n is None:
            return

        if self.v is None:
            self.v = n
            return
        self.v = self.f(self.v, n)


def main():
    N, S = read_values()
    A = read_list()

    dp = [(0, 0, 0) for _ in range(S + 1)]
    dp[0] = (1, 1, 1)

    for a in A:
        for s in range(S, -1, -1):
            d1 = dp[s][0]
            d2 = (dp[s][1] + (0 if s - a < 0 else dp[s - a][1]) + d1) % mod
            d3 = (dp[s][2] + (0 if s - a < 0 else dp[s - a][1]) + d2) % mod
            dp[s] = (d1, d2, d3)

    print((dp[S][2] - dp[S][1]) % mod)


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

if __name__ == "__main__":
    N = int(input())
    S = input()

    for i in range(N//2, 0, -1):
        if N-i*2 == 0:
            tmp = '0'*i + S[i:]
            if tmp.find(S[:i]) != -1:
                print(i)
                exit()
        else:
            for index in range(N-i*2):
                # 仮の文字列の生成
                tmp = S[:index] + '0'*i + S[index+i:]
                if tmp.find(S[index:index+i]) != -1:
                    print(i)
                    exit()

    print('0')


### FIXED CODE ###

if __name__ == "__main__":
    N = int(input())
    S = input()

    dp = [[0] * 5005 for i in range(5005)]

    for i in range(N, 0, -1):
        for j in range(N, 0, -1):
            if S[i-1] != S[j-1]:
                dp[i][j] = 0
            else:
                dp[i][j] = dp[i+1][j+1] + 1

    result = 0
    for i in range(N):
        for j in range(N):
            if i >= j:
                continue
            now = min(dp[i][j], j-i)
            result = max([now, result])

    print(result)
### BUGGY CODE ###

s = str(input())
t = str(input())
ans = "Yes"
for i in range(len(s)):
    if s.count(s[i])!=t.count(t[i]):
        ans = "No"
        break
    else:
        continue
print(ans)

### FIXED CODE ###

import collections
s = input()
t = input()
s = collections.Counter(s)
t = collections.Counter(t)
if sorted(s.values()) == sorted(t.values()):
  print("Yes")
else:
  print("No")
### BUGGY CODE ###

N = int(input())
A = list(map(int,input().split()))
for i in range(N):
    A[i] = A[i]-i-1
A.sort()
import bisect
z = bisect.bisect_left(A,0)
ans = sum(A[z:])-sum(A[:z])
if z > N-z:
    b = -1
    while z>N-z:
        ans += N - 2*z
        b -= 1
        z = bisect.bisect_right(A,b)
elif N > 2*bisect.bisect_left(A,1):
    z = bisect.bisect_left(A,1)
    b = 1
    while N-z>z:
        ans += 2*z - N
        b += 1
        z = bisect.bisect_left(A,2)
print(ans)

### FIXED CODE ###

N = int(input())
A = list(map(int,input().split()))
for i in range(N):
    A[i] = A[i]-i-1
A.sort()
import bisect
z = bisect.bisect_left(A,0)
ans = sum(A[z:])-sum(A[:z])
if z > N-z:
    p = 0
    while z>N-z:
        b = A[z-1]
        ans += (N - 2*z) * (p-b)
        p = b
        z = bisect.bisect_left(A,b)
elif N > 2*bisect.bisect_right(A,0):
    z = bisect.bisect_right(A,0)
    p = 0
    while N-z>z:
        b = A[z]
        ans += (2*z - N) * (b-p)
        p = b
        z = bisect.bisect_right(A,b)
print(ans)
### BUGGY CODE ###

n = int(input())
even = n%2
ans = []
s = list(map(int,(input().split())))
for i in range(n):
    if i%2 != even:
        ans.insert(0,s[i])
    else:
        ans.append(s[i])
print(" ".join(map(str,ans)))


### FIXED CODE ###

n = int(input())
even = 0
if n % 2 == 0:
    even = 1

el = []
ol = []
#n偶数のとき逆順奇数列＋普通の偶数列
s = list(map(int,(input().split())))
for i in range(n):
    if i%2 ==0:#guusuu
        el.append(s[i])
    else:
        ol.append(s[i])
if even == 1:#偶数のとき
    ol.reverse()
    ol.extend(el)
    print(" ".join(map(str,ol)))
else:
    el.reverse()
    el.extend(ol)
    print(" ".join(map(str,el)))
### BUGGY CODE ###

N,Q=map(int,input().split())
S=input()
for q in range(Q):
    l,r=map(int,input().split())
    print(S[l-1:r].count("AC"))


### FIXED CODE ###

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

# 最初から数えておく
#C=[1 if S[i:i+2]=='AC' else 0 for i in range(N-1)]
C=[0]*(N+1)
for i in range(N):
    C[i+1]=C[i]+(1 if S[i:i+2]=='AC' else 0)
#print(C)
#exit()

#print()
#print("#"*20)
for q in range(Q):
    l,r=map(int,input().split())
    #print(S[l-1:r].count("AC"))
    #print(sum(C[l-1:r-1]))
    print(C[r-1]-C[l-1])
### BUGGY CODE ###

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

def expectation(pp):
    return 1 + (0.5 * (pp - 1))

p = list(map(int, input().split()))
ep = tuple(map(expectation, p))

# print(ep)

# print(ep[0:K])

tmp_sum = sum(ep[0:K])
save_sum = tmp_sum

for i in range(1, N - K + 1):
    tmp = ep[i : i + K]
    tmp_sum -= ep[i - 1]
    tmp_sum += tmp[K - 1]
    save_sum = max(tmp_sum, save_sum)
    
print(save_sum)


### FIXED CODE ###

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

def expectation(pp):
    return 1 + (0.5 * (pp - 1))

p = list(map(int, input().split()))
ep = tuple(map(expectation, p))

cum = [0]
cum_append = cum.append
for i in range(N):
    cum_append(cum[i] + ep[i])

result = 0

for i in range(0, N - K + 1):
    tmp = cum[i + K] - cum[i]
    result = max(result, tmp)
    
print(result)
### BUGGY CODE ###

# BFS
from collections import deque
import numpy as np


def main():
    dx = [1, 0, -1, 0]
    dy = [0, 1, 0, -1]
    # 頂点数と辺数
    H, W = map(int, input().split())
    A = [list(input()) for _ in range(H)]
    # 全頂点を未訪問に初期化
    dist = [[-1] * W for _ in range(H)]

    ans = float('inf')
    que = deque()
    for h in range(H):
        for w in range(W):
            if A[h][w] == '#':
                que.append([h, w])
                dist[h][w] = 0

    # bfs開始 (キューが空になるまで探索を行う)
    while len(que) > 0:
        v = que.popleft()  # キューから先頭頂点を取り出す
        for i in range(4):
            nx = v[0] + dx[i]
            ny = v[1] + dy[i]
            if (0 <= nx and nx < H and 0 <= ny and ny < W and dist[nx][ny] == -1):
                que.append([nx, ny])
                dist[nx][ny] = dist[v[0]][v[1]] + 1
    print(np.max(dist))


if __name__ == "__main__":
    main()


### FIXED CODE ###

# BFS
from collections import deque


def main():
    dx = [1, 0, -1, 0]
    dy = [0, 1, 0, -1]
    # 頂点数と辺数
    H, W = map(int, input().split())
    A = [list(input()) for _ in range(H)]
    # 全頂点を未訪問に初期化
    dist = [[-1] * W for _ in range(H)]

    ans = float('inf')
    que = deque()
    for h in range(H):
        for w in range(W):
            if A[h][w] == '#':
                que.append([h, w])
                dist[h][w] = 0

    # bfs開始 (キューが空になるまで探索を行う)
    while len(que) > 0:
        v = que.popleft()  # キューから先頭頂点を取り出す
        for i in range(4):
            nx = v[0] + dx[i]
            ny = v[1] + dy[i]
            if (0 <= nx and nx < H and 0 <= ny and ny < W and dist[nx][ny] == -1):
                que.append([nx, ny])
                dist[nx][ny] = dist[v[0]][v[1]] + 1
    ans = 0
    for h in range(H):
        for w in range(W):
            ans = max(ans, dist[h][w])
    print(ans)


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

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

### FIXED CODE ###

N=int(input())
A=list(map(int,input().split()))
B=list(range(1, N + 1))
import collections
new_A=collections.Counter(A)
for i in B:
    print(new_A[i])
### BUGGY CODE ###

import sys
import numpy as np

input = sys.stdin.readline

N, W = map(int, input().split())
Weight, V = [], []
for i in range(N):
    w, v = map(int, input().split())
    Weight.append(w)
    V.append(v)

dp = np.zeros((N+1, W+1))

for i in range(N):
    for w in range(W+1):
        if w >= Weight[i]:
            dp[i+1, w] = dp[i, w - Weight[i]] + V[i]
        else:
            dp[i+1, w] = dp[i, w]
maximum = 0
for i in range(N+1):
    for j in range(W+1):
        if maximum < dp[i,j]:
            maximum = dp[i,j]
print(int(maximum))


### FIXED CODE ###

N, W = map(int, input().split())
#i個目の品物までで重さw以下のときの価値の最大値 
dp = [[0]*(W+1) for _ in range(N+1)]
"""
dp[i, wi:W+1] = max(i番目の重さwiの品物を入れた場合, 入れなかった場合)
         = np.max(dp[i-1, :W-wi+1] + v, dp[i-1, wi:W+1])
"""

for i in range(1, N+1):
    w, v = map(int, input().split())

    for j in range(W+1):
        if j - w >= 0:
            dp[i][j] = max(dp[i-1][j], dp[i-1][j-w] + v)
        else:
            dp[i][j] = dp[i-1][j]

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

s = list(input())
i=0
ans = 0
while i < (len(s)-1):
    if s[i] != s[i+1]:
        ans += 2
        s.pop(i)
        s.pop(i)
        i=-1
    i+=1
print(ans)

### FIXED CODE ###

s = list(input())
print(min(s.count("0"),s.count("1"))*2)
### BUGGY CODE ###

from collections import Counter

H, W, M = [int(n) for n in input().split()]
h = []
w = []
for m in range(M):
    tmp = [int(n) for n in input().split()]
    h.append(tmp[0])
    w.append(tmp[1])

h_counter = Counter(h)
w_counter = Counter(w)

most_common_h_list = []
most_common_w_list = []

most_common_h_count = 0
for k, v in h_counter.most_common():
    if v < most_common_h_count:
        break
    most_common_h_list.append(k)
    most_common_h_count = v

most_common_w_count = 0
for k, v in w_counter.most_common():
    if v < most_common_w_count:
        break
    most_common_w_list.append(k)
    most_common_w_count = v

ans = 0
finished = False
for hh in most_common_h_list:
    if finished:
        break
    for ww in most_common_w_list:
        for m in range(M):
            if h[m] == hh and w[m] == ww:
                tt = most_common_h_count + most_common_w_count - 1
                if tt > ans:
                    ans = tt
                break
        else:
            tt = most_common_h_count + most_common_w_count
            if tt > ans:
                ans = tt
            break
            finished = True
            break

print(ans)


### FIXED CODE ###

H, W, M = [int(n) for n in input().split()]
H_freq = [0] * H
W_freq = [0] * W

table = []
for m in range(M):
    h, w = [int(n)-1 for n in input().split()]
    H_freq[h] += 1
    W_freq[w] += 1
    table.append((h, w))

max_h = max(H_freq)
max_w = max(W_freq)
most_freqent_h = [i for i, h in enumerate(H_freq) if h == max_h]
most_freqent_w = [i for i, w in enumerate(W_freq) if w == max_w]

count = 0
for (h, w) in table:
    if H_freq[h] == max_h and W_freq[w] == max_w:
        count += 1

if count < len(most_freqent_h) * len(most_freqent_w):
    print(max_h + max_w)
else:
    print(max_h + max_w - 1)
### BUGGY CODE ###

k = int(input())
def gcd(a, b):
    if b == 0:
        return a
    else:
        return gcd(b, a % b)

ans = 0
for a in range(1, k+1):
    for b in range(1, k+1):
        for c in range(1, k+1):
            ans += gcd(gcd(a,b), c)

print(ans)


### FIXED CODE ###

k = int(input())
memo = [[-1 for i in range(k+1)] for j in range(k+1)]
def gcd(a, b):
    if b == 0:
        return a
    else:
        if memo[a][b] == -1:
            memo[a][b] = gcd(b, a % b)
        return memo[a][b]
ans = 0
for a in range(1, k+1):
    for b in range(1, k+1):
        for c in range(1, k+1):
            ans += gcd(gcd(a,b), c)

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

import sys
def input(): return sys.stdin.readline().rstrip()
def main():
    n=int(input())
    l,r=0,n
    print(0)
    s=input()
    ls=s
    if s=='Vacant':sys.exit()
    while True:
        x=(l+r)//2
        print(x)
        s=input()
        if s=='Vacant':break
        elif ((x-l)%2==0 and s==ls) or ((x-l)%2==1 and s!=ls):
            l=x
            ls=s
        else:
            r=x


if __name__=='__main__':
    main()

### FIXED CODE ###

N=int(input())
l,r=0,N
print(0)
s=input()
ls=s
if s!='Vacant':
    for i in range(19):
        x=l+(r-l)//2
        print(x)
        s=input()
        if s=='Vacant':
            break
        elif (x-l)%2==0 and s==ls or (x-l)%2==1 and s!=ls:
            l=x
            ls=s
        else:
            r=x
### BUGGY CODE ###

a, b = map(int, input().split())
g = []
def gcd(a,b):
    if b == 0:
        return a
    return gcd(b, a%b)
g.append(gcd(a,b))
g.append(1)
j = 1
for i in range(2,g[0]):
    if not a%i and not b%i:
        c = True
        for k in range(1, len(g)):
            if gcd(g[k],i)!=1:
                c = False
                break
        if c:
            g.append(i)
c = True
for i in range(1, len(g)):
    if gcd(g[0],g[i])!=1:
        c = False
        break
if c and g[0] != 1:
    print(len(g))
else:
    print(len(g)-1)

### FIXED CODE ###

a, b = map(int, input().split())
def factor(n):
    a = []
    while not n%2:
       n//=2
       a.append(2)
    i = 3
    while i*i<=n:
        while not n%i:
            n//=i
            a.append(i)
        i+=2
    if n>1:
        a.append(n)
    return a
print(len(set(factor(a))&set(factor(b)))+1)
### BUGGY CODE ###

def factor(N):
    ret = []
    i = 2
    while N > 1:
        if N % i == 0:
            ret.append(i)
            N //= i
        else:
            i += 1
    return ret


from collections import Counter


def solve(N, K, As):
    if K > max(As):
        return "IMPOSSIBLE"

    factors = [Counter(factor(a)) for a in As]
    iter = factors[0]
    for f in factors[1:]:
        for k, v in iter.items():
            if k not in f:
                iter[k] = 0
            else:
                iter[k] = min(v, f[k])

    if all([v == 0 for v in iter.values()]):
        return "POSSIBLE"
    else:
        d = 1
        for k, v in iter.items():
            if v != 0:
                d *= k ** v
        if K % d == 0:
            return "POSSIBLE"
    return "IMPOSSIBLE"

if __name__ == "__main__":
    N, K = tuple(map(int, input().split(" ")))
    As = list(map(int, input().split(" ")))
    print(solve(N, K, As))


### FIXED CODE ###

def factor(N):
    ret = []
    i = 2
    while N > 1:
        if N % i == 0:
            ret.append(i)
            N //= i
        else:
            i += 1
    return ret


assert (factor(4) == [2, 2])
assert (factor(2) == [2])
assert (factor(3) == [3])
assert (factor(10) == [2, 5])

from collections import Counter


def solve(N, K, As):
    if K > max(As):
        return "IMPOSSIBLE"
    iter = Counter(factor(min(As)))
    for a in As:
        for k, v in iter.items():
            if a % k != 0:
                iter[k] = 0
            else:
                count = 0
                kk = k
                while a % kk == 0:
                    kk *= k
                    count += 1
                iter[k] = min(v, count)

    if all([v == 0 for v in iter.values()]):
        return "POSSIBLE"
    else:
        d = 1
        for k, v in iter.items():
            if v != 0:
                d *= k ** v
        if K % d == 0:
            return "POSSIBLE"
    return "IMPOSSIBLE"


if __name__ == "__main__":
    N, K = tuple(map(int, input().split(" ")))
    As = list(map(int, input().split(" ")))
    print(solve(N, K, As))
### BUGGY CODE ###

a,b,k=map(int,input().split())
array=[]
c=[]
for i in range(a,b+1):
    array.append(i)
if k<=b-a+1:
    for i in range(k):
        c.append(array[i])
    for i in range(b-a-k+1,b-a+1):
        c.append(array[i])
    c=set(c)
    c=list(c)
    c.sort()
    for i in range(len(c)):
        print(c[i])
else:
    for i in range(b-a+1):
        print(array[i])


### FIXED CODE ###

a,b,k=map(int,input().split())
c=[]
if k<=b-a+1:
    for i in range(k):
        c.append(a+i)
    for i in range(b-k+1,b+1):
        c.append(i)
    c=set(c)
    c=list(c)
    c.sort()

    for i in range(len(c)):
        print(c[i])
else:
    for i in range(a,b+1):
        print(i)
### BUGGY CODE ###

import sys 
a,b,c,k = map(int,input().split())
max=0
if(a==k):
    print(a)
elif(c==0):
    print(a%k)
    
else:
    while(a>0 and k>0):
        max+=1
        a-=1
        k-=1
    if(k<=0):
        print(max)
    else:
        while(b>0 and k>0):
            b-=1
            k-=1
        if(k<=0):
            print(max)
        else:
            while(c>0 and k>0):
                max-=1
                c-=1
                k-=1
            if(k<=0):
                print(max)
        



### FIXED CODE ###

import sys 
a,b,c,k = map(int,input().split())
max=0
if(a==k):
    print(a)
elif(a>k):
    print(k)
else:
    if(a<k):
        max+=a
        k=k-a
    if(b>k):
        print(max)
    else:
        k=k-b
        if(k<=0):
            print(max)
        else:
            if(c>=k):
                max-=k
                print(max)
            elif(c<k):
                max-=c
                print(max)