Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split())
sc = [list(map(int, input().split())) for _ in range(M)]

ans = [-1] * N

for i in range(M):
    s = sc[i][0] - 1
    c = sc[i][1]
    if ans[s] is -1:
        ans[s] = c
    elif not ans[s] == c:
        print(-1)
        exit(-1)
if ans[-1] == 0:
    print(-1)
    exit(-1)

a = 0
for i in range(N):
    if ans[i] is -1:
        ans[i] = 0
    a += ans[i]*10**(N-i-1)

print(a)


Fixed submission:
N, M = map(int, input().split())
sc = [list(map(int, input().split())) for _ in range(M)]

ans = [-1] * N

for i in range(M):
    s = sc[i][0] - 1
    c = sc[i][1]
    if ans[s] is -1:
        ans[s] = c
    elif not ans[s] == c:
        print(-1)
        exit()

if N!=1 and ans[0] == 0:
    print(-1)
    exit()

a = 0
for i in range(N):
    if ans[i] is -1:
        if i == 0 and N!= 1:
            ans[i] = 1
        else:
            ans[i] = 0
    a += ans[i]*10**(N-i-1)

print(a)

Buggy python submission (verdict: Runtime Error):
N, M = map(int, input().split())
sc = [list(map(int, input().split())) for _ in range(M)]

ans = [-1] * N

for i in range(M):
    s = sc[i][0] - 1
    c = sc[i][1]
    if ans[s] is -1:
        ans[s] = c
    elif ans[s] is not c:
        print(-1)
        exit(-1)
if ans[0] == 0:
    print(-1)
    exit(-2)

a = 0
for i in range(N):
    if ans[i] is -1:
        ans[i] = 0
    a += ans[i]*10**(N-i-1)

print(a)


Fixed submission:
N, M = map(int, input().split())
sc = [list(map(int, input().split())) for _ in range(M)]

ans = [-1] * N

for i in range(M):
    s = sc[i][0] - 1
    c = sc[i][1]
    if ans[s] is -1:
        ans[s] = c
    elif not ans[s] == c:
        print(-1)
        exit()

if N!=1 and ans[0] == 0:
    print(-1)
    exit()

a = 0
for i in range(N):
    if ans[i] is -1:
        if i == 0 and N!= 1:
            ans[i] = 1
        else:
            ans[i] = 0
    a += ans[i]*10**(N-i-1)

print(a)
Buggy python submission (verdict: Runtime Error):
import math

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

x, y = map(int, input().split())

if (2*x-y) % 3 == 0:
    b = (2*x-y)/3
    a = x-2*b
    if a<0:
        print(0)
        exit()
else:
    print(0)
    exit()

print(int(comb(a+b, a)%(1e9+7)))


Fixed submission:
p = 10**9+7
def nCr(n,r):
    if r*2>n:
        return nCr(n,n-r)
    else:
        a = b = 1
        for i in range(r):
            a = a * (n - i) % p
            b = b * (r - i) % p
        return (a * pow(b,p-2,p)) % p

x, y = map(int, input().split())

if (2*x-y) % 3 == 0 and (2*y-x) % 3 == 0 and (2*x-y)>=0 and (2*y-x)>=0:
    b = (2*x-y)//3
    a = x-2*b
else:
    print(0)
    exit()

print(int(nCr(a+b, a)))

Buggy python submission (verdict: Runtime Error):
from scipy.special import comb

x, y = map(int, input().split())

if (2*x-y) % 3 == 0:
    b = (2*x-y)/3
    a = x-2*b
    if a<0:
        print(0)
        exit()
else:
    print(0)
    exit()

print(int(comb(a+b, a, exact=True)%(1e9+7)))


Fixed submission:
p = 10**9+7
def nCr(n,r):
    if r*2>n:
        return nCr(n,n-r)
    else:
        a = b = 1
        for i in range(r):
            a = a * (n - i) % p
            b = b * (r - i) % p
        return (a * pow(b,p-2,p)) % p

x, y = map(int, input().split())

if (2*x-y) % 3 == 0 and (2*y-x) % 3 == 0 and (2*x-y)>=0 and (2*y-x)>=0:
    b = (2*x-y)//3
    a = x-2*b
else:
    print(0)
    exit()

print(int(nCr(a+b, a)))
Buggy python submission (verdict: Time Limit Exceeded):
import sys
n = int(input())
s = [input() for i in range(n)]

ans = 0
dic =[]
for i in s:
    a = [c for c in i]
    a.sort()
    if len(dic) == 0:
        dic.append(a)
    else:
        for d in dic:
            if a==d:
                ans+=1
            
        dic.append(a)
print(ans)


Fixed submission:
import sys
n = int(input())
s = [input() for i in range(n)]

ans = 0
d = {}
for i in s:
    a = [c for c in i]
    a.sort()
    a = "".join(a)
    if a in d:
        ans+= d[a]
        d[a] +=1
    else:
        d[a] = 1
print(ans)
Buggy python submission (verdict: Runtime Error):
n, x = map(int, input().split())
l = list(map(int, input().split()))

cnt = 0
d = 0
while True:
    d += l[cnt]
    cnt += 1
    if d > x or cnt > len(l):
        break
print(cnt)


Fixed submission:
n, x = map(int, input().split())
l = list(map(int, input().split()))

ans = 1
d = 0
for i in range(n):
    d += l[i]
    if d <= x:
        ans += 1
print(ans)

Buggy python submission (verdict: Runtime Error):
n, x = map(int, input().split())
l = list(map(int, input().split()))

def iter(d, idx):
    return d+l[idx]

cnt = 0
d = 0
while True:
    d = iter(d, cnt)
    cnt += 1
    if d > x:
        break
print(cnt)


Fixed submission:
n, x = map(int, input().split())
l = list(map(int, input().split()))

ans = 1
d = 0
for i in range(n):
    d += l[i]
    if d <= x:
        ans += 1
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
import itertools

mod = 1000000007
sum = 0
N = int(input())
A = list(map(int, input().split()))
for v in itertools.combinations(A, 2):
    sum += v[0] * v[1]
print(sum%mod)


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

mod = 1000000007
S = {}
S[0] = A[0]
for i in range(1, len(A)):
    S[i] = S[i-1] + A[i]

ans = 0
for i in range(len(A)):
    sum = S[len(S)-1] - S[i]
    ans += A[i] * sum
print(ans%mod)
Buggy python submission (verdict: Time Limit Exceeded):
N, M, K = map(int, input().split())

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

max_cnt = 0
for a in range(len(A)+1):
    if sum(A[:a]) > K:
        break
    for b in range(len(B)+1):
        time = sum(A[:a]) + sum(B[:b])
        if time <= K:
            cnt = a + b
            if cnt > max_cnt:
                max_cnt = cnt
        else:
            break
print(max_cnt)


Fixed submission:
N, M, K = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

A = [0]
B = [0]
for i in range(len(a)):
    A.append(A[i] + a[i])
for i in range(len(b)):
    B.append(B[i] + b[i])

ans = 0
j = len(B) - 1
for i in range(len(A)):
    if A[i] > K:
        break
    while A[i] + B[j] > K:
        j -= 1
    ans = max(ans, i + j)
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
N, M, K = map(int, input().split())

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

max_cnt = 0
for a in range(len(A)+1):
    for b in range(len(B)+1):
        time = sum(A[:a]) + sum(B[:b])
        if time <= K:
            cnt = a + b
            if cnt > max_cnt:
                max_cnt = cnt
print(max_cnt)


Fixed submission:
N, M, K = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

A = [0]
B = [0]
for i in range(len(a)):
    A.append(A[i] + a[i])
for i in range(len(b)):
    B.append(B[i] + b[i])

ans = 0
j = len(B) - 1
for i in range(len(A)):
    if A[i] > K:
        break
    while A[i] + B[j] > K:
        j -= 1
    ans = max(ans, i + j)
print(ans)

Buggy python submission (verdict: Runtime Error):
N, M, K = map(int, input().split())

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

i = 0
a = 0
b = 0
time = 0
while True:
    i += 1
    if len(A) == 0:
        time += B[b]
        b += 1
    elif len(B) == 0:
        time += A[a]
        a += 1
    else:
        if A[a] <= B[b]:
            time += A[a]
            a += 1
        elif A[a] > B[b]:
            time += B[b]
            b += 1
    if K < time:
        print(i - 1)
        exit()
    elif len(A) == 0 and len(B) == 0:
        print(i)
        exit()


Fixed submission:
N, M, K = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))

A = [0]
B = [0]
for i in range(len(a)):
    A.append(A[i] + a[i])
for i in range(len(b)):
    B.append(B[i] + b[i])

ans = 0
j = len(B) - 1
for i in range(len(A)):
    if A[i] > K:
        break
    while A[i] + B[j] > K:
        j -= 1
    ans = max(ans, i + j)
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
P = list(map(int, input().split()))

ans = float("inf")
for i in range(1 << len(P)):
    sum = 0
    cnt = 0
    for j in range(len(P)):
        if (i >> j) & 1 == 1:
            sum += P[j]
            cnt += 1
            if cnt == K:
                ans = min(ans, sum)
print(ans)


Fixed submission:
N, K = map(int, input().split())
P = list(map(int, input().split()))

P = sorted(P)

print(sum(P[:K]))
Buggy python submission (verdict: Runtime Error):
X, N = map(int, input().split())
L = list(map(int, input().split()))

if len(L) == 0:
    print(X)
    exit()

list = [0 for _ in range(len(L))]
for i in range(len(L)):
    list[i] = abs(X - L[i])
list = sorted(list)

if min(list) != 0:
    print(X)
    eixt()
else:
    num = 1
    cnt = 0
    for i in range(1, len(list)):
        if list[i] != num:
            break
        cnt += 1
        if cnt == 2:
            cnt = 0
            num += 1
if cnt == 0:
    print(X - num)
else:
    if X + num in L:
        print(X - num)
    else:
        print(X + num)


Fixed submission:
X, N = map(int, input().split())
L = list(map(int, input().split()))

if len(L) == 0:
    print(X)
    exit()

list = [0 for _ in range(len(L))]
for i in range(len(L)):
    list[i] = abs(X - L[i])
list = sorted(list)

if min(list) != 0:
    print(X)
    exit()
else:
    num = 1
    cnt = 0
    for i in range(1, len(list)):
        if list[i] != num:
            break
        cnt += 1
        if cnt == 2:
            cnt = 0
            num += 1
if cnt == 0:
    print(X - num)
else:
    if X + num in L:
        print(X - num)
    else:
        print(X + num)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int, input().split()))

ans = 1
for i in range(N):
    ans *= A[i]
if ans > 10 ** 18:
    print(-1)
else:
    print(ans)


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

if 0 in A:
    print(0)
    exit()

ans = 1
for i in range(N):
    ans *= A[i]
    if ans > 10 ** 18:
        print(-1)
        exit()
print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())
XY_list = [[] for _ in range(N)]
for i in range(N):
    num = int(input())
    for j in range(num):
        person, state = map(int, input().split())
        XY_list[i].append([person - 1, state])
ans = 0
for i in range(1 << N):
    bool = True
    for j in range(N):
        if (i >> j) & 1 == 1:
            for person, state in XY_list[j]:
                if (i >> person) & 1 != state:
                    bool = False
                    break
"""
        else:
            for person, state in XY_list[j]:
                if (i >> person) & 1 == state:
                    bool = False
                    break
"""
    if bool:
        ans = max(ans, bin(i)[2:].count("1"))
print(ans)


Fixed submission:
N = int(input())
XY_list = [[] for _ in range(N)]
for i in range(N):
    num = int(input())
    for j in range(num):
        person, state = map(int, input().split())
        XY_list[i].append([person - 1, state])
ans = 0
for i in range(1 << N):
    bool = True
    for j in range(N):
        if (i >> j) & 1 == 1:
            for person, state in XY_list[j]:
                if (i >> person) & 1 != state:
                    bool = False
                    break

    if bool:
        ans = max(ans, bin(i)[2:].count("1"))
print(ans)
Buggy python submission (verdict: Runtime Error):
N = int(input())

if N > 81 or N == 0:
    print("No")
    exit()

for i in range(1, 10):
    for j in range(1, 10):
        if i * j == N:
            print("Yes")
            eixt()
print("No")


Fixed submission:
N = int(input())

if N > 81 or N == 0:
    print("No")
    exit()

for i in range(1, 10):
    for j in range(1, 10):
        if i * j == N:
            print("Yes")
            exit()
print("No")
Buggy python submission (verdict: Runtime Error):
A, B, C, X, Y = map(int, input().split())

ans = float("inf")

if X > Y:
    ab = 2 * X
    while ab > 0:
        a = X - (ab / 2)
        if ab / 2 < Y:
            b = int(Y - 2 * ab)
        else:
            b == 0
        money = a * A + b * B + ab * C
        ans = min(ans, money)
        ab -= 2
else:
    ab = 2 * Y
    while ab > 0:
        b = Y - (ab / 2)
        if ab / 2 < X:
            a = int(X - 2 * ab)
        else:
            a = 0
        money = a * A + b * B + ab * C
        ans = min(ans, money)
        ab -= 2
print(int(ans))


Fixed submission:
A, B, C, X, Y = map(int, input().split())

ans = float("inf")

if X > Y:
    ab = 2 * X
    while ab >= 0:
        a = X - (ab / 2)
        if ab / 2 < Y:
            b = int(Y - ab / 2)
        else:
            b = 0
        money = a * A + b * B + ab * C
        ans = min(ans, money)
        ab -= 2
else:
    ab = 2 * Y
    while ab >= 0:
        b = Y - (ab / 2)
        if ab / 2 < X:
            a = int(X - ab / 2)
        else:
            a = 0
        money = a * A + b * B + ab * C
        ans = min(ans, money)
        ab -= 2
print(int(ans))
Buggy python submission (verdict: Time Limit Exceeded):
N, K = map(int, input().split())
a = list(map(int, input().split()))

a_set = list(set(a))
if len(a_set) < K:
    print(0)
    exit()

num_dict = {}
for num in a_set:
    num_dict[num] = a.count(num)
num_dict = sorted(num_dict.items(), key = lambda x: x[1])

diff = len(a_set) - K
ans = 0
for i in range(diff):
    ans += num_dict[i][1]
print(ans)


Fixed submission:
from collections import Counter

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

sum = 0
c = Counter(a).most_common()
if K > len(c):
    print(0)
    exit()
for i in range(K):
    sum += c[i][1]
print(len(a) - sum)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int, input().split()))

a_max = max(A)
a_min = min(A)
dummy = -float("inf")

for x in range(a_min, a_max+1):
    cnt = 0
    A_replace = [l for l in A if l -1 <= x and l + 1 >= x]
    if dummy < len(A_replace):
        dummy = len(A_replace)
        ans = dummy
print(ans)


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

a_max = max(A)
a_min = min(A)

cnt_dict = {}
for i in range(a_min-1, a_max+2):
    cnt_dict[i] = 0
for i in range(len(A)):
    cnt_dict[A[i]-1] += 1
    cnt_dict[A[i]] += 1
    cnt_dict[A[i]+1] += 1

print(max(cnt_dict.items(), key = lambda x: x[1])[1])

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int, input().split()))

a_max = max(A)
a_min = min(A)
dummy = -float("inf")

for x in range(a_min, a_max+1):
    cnt = 0
    for i in range(len(A)):
        if A[i] -1 <= x and A[i] + 1 >= x:
            cnt += 1
            if dummy < cnt:
                dummy = cnt
print(dummy)


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

a_max = max(A)
a_min = min(A)

cnt_dict = {}
for i in range(a_min-1, a_max+2):
    cnt_dict[i] = 0
for i in range(len(A)):
    cnt_dict[A[i]-1] += 1
    cnt_dict[A[i]] += 1
    cnt_dict[A[i]+1] += 1

print(max(cnt_dict.items(), key = lambda x: x[1])[1])

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int, input().split()))

a_max = max(A)
a_min = min(A)
dummy = -float("inf")

for x in range(a_min-1, a_max+1+1):
    cnt = 0
    for i in range(len(A)):
        if A[i] -1 <= x and A[i] + 1 >= x:
            cnt += 1
            if dummy < cnt:
                dummy = cnt
print(dummy)


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

a_max = max(A)
a_min = min(A)

cnt_dict = {}
for i in range(a_min-1, a_max+2):
    cnt_dict[i] = 0
for i in range(len(A)):
    cnt_dict[A[i]-1] += 1
    cnt_dict[A[i]] += 1
    cnt_dict[A[i]+1] += 1

print(max(cnt_dict.items(), key = lambda x: x[1])[1])
Buggy python submission (verdict: Time Limit Exceeded):
N, C, K = map(int, input().split())
T = [0 for _ in range(N)]
for i in range(N):
    T[i] = int(input())
T = sorted(T)

ans = 0
while T != []:
    cnt = 0
    for i in range(len(T)):
        cnt += 1
        if T[i] - T[0] > K or cnt > C:
            T = T[i:]
            ans += 1
            break
        if i == len(T)-1:
            ans += 1
            T = []
print(ans)


Fixed submission:
N, C, K = map(int, input().split())
T = [0 for _ in range(N)]
for i in range(N):
    T[i] = int(input())
T = sorted(T)

flag = 0
cnt = 0
ans = 0
for i in range(len(T)):
    time = T[i] - T[flag]
    cnt += 1
    if time > K or cnt > C:
        flag = i
        cnt = 1
        ans += 1
print(ans + 1)
Buggy python submission (verdict: Time Limit Exceeded):
K, S = map(int, input().split())

cnt = 0
for x in range(K+1):
    for y in range(K+1):
        for z in range(K+1):
            if x + y + z == S:
                cnt += 1
print(cnt)


Fixed submission:
K, S = map(int, input().split())

cnt = 0
for x in range(K+1):
    for y in range(K+1):
        z = S - x - y
        if z >= 0 and z <= K:
            cnt += 1
print(cnt)

Buggy python submission (verdict: Time Limit Exceeded):
K, S = map(int, input().split())

cnt = 0
for x in range(K+1):
    for y in range(K+1):
        for z in range(K+1):
            if x + y + z == S:
                cnt += 1
print(cnt)


Fixed submission:
K, S = map(int, input().split())

cnt = 0
for x in range(K+1):
    for y in range(K+1):
        z = S - x - y
        if z >= 0 and z <= K:
            cnt += 1
print(cnt)
Buggy python submission (verdict: Time Limit Exceeded):
import math
from collections import defaultdict as dd

def count_divisor(x):
  if x == 1:
    return 1
  
  divided = x
  d = dd(int)
  for i in range(2, math.floor(math.sqrt(x))+1):
    while divided%i == 0:
      d[i] += 1
      divided /= i
  if divided != 1:
    d[int(divided)] += 1
  
  count = 1
  for v in d.values():
     count *= v+1
  return count

N = int(input())
ans = 0
for c in range(1, N):
  ans += count_divisor(N-c)
print(ans)

Fixed submission:
N = int(input())
ans = 0
for a in range(1, N):
  ans += N//a
  if N%a == 0:
    ans -= 1
print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
tmp = 0
for i in reversed(range(len(str(N)))):
  n, N = N//(10**i), N%(10**i)
  tmp += n
N = tmp 
if N%9 == 0:
  print("Yes")
else:
  print("No")

Fixed submission:
N = input()
M = N
tmp = 0
for i in range(len(N)):
  n, M = int(M[0]), M[1:]
  tmp += n
if tmp%9 == 0:
  print("Yes")
else:
  print("No")

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
while 9 < N:
  tmp = 0
  for i in reversed(range(len(str(N)))):
    n, N = N//(10**i), N%(10**i)
    tmp += n
  N = tmp 
if N%9 == 0:
  print("Yes")
else:
  print("No")

Fixed submission:
N = input()
M = N
tmp = 0
for i in range(len(N)):
  n, M = int(M[0]), M[1:]
  tmp += n
if tmp%9 == 0:
  print("Yes")
else:
  print("No")
Buggy python submission (verdict: Runtime Error):
H, W, M = map(int, input().split())
bomb = [[0] * W for _ in range(H)]
Height = [0] * H
Width = [0] * W
for m in range(M):
  h, w = map(lambda x:int(x)-1, input().split())
  bomb[h][w] += 1
  Height[h] += 1
  Width[w] += 1
max_H, max_W = max(Height), max(Width)
cH, cW = [], []
for i in range(H):
  if Height[i] == max_H:
    cH.append(i)
for i in range(W):
  if Width[i] == max_W:
    cW.append(i)

dont_sub = 0
for idx_h in cH:
  for idx_w in cW:
    if bomb[idx_h][idx_w] == 0:
      dont_sub = 1
      break
  if dont_sub == 1:
    break
if dont_sub == 0:
  print(max_H + max_W - 1)
else:
  print(max_H + max_W)

Fixed submission:
H, W, M = map(int, input().split())
target = []
Height = [0] * H
Width = [0] * W
for m in range(M):
  h, w = map(lambda x: int(x)-1, input().split())
  target.append((h, w))
  Height[h] += 1
  Width[w] += 1
max_H, max_W = max(Height), max(Width)

cH, cW = 0, 0
for i in range(H):
  if Height[i] == max_H:
    cH +=1
for i in range(W):
  if Width[i] == max_W:
    cW +=1
max_cross = cH * cW

double_count = 0
for h, w in target:
  if Height[h] == max_H and Width[w] == max_W:
    double_count += 1

if double_count == max_cross:
  print(max_H + max_W - 1)
else:
  print(max_H + max_W)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = list(map(int, input().split()))

ans = 1
for a in A:
  ans *= a
if 10**18 < ans:
  print(-1)
else:
  print(ans)

Fixed submission:
import sys

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

if 0 in A:
  print(0)
  sys.exit()

ans = 1
for a in A:
  ans *= a
  if 10**18 < ans:
    print(-1)
    sys.exit()
else:
  print(ans)
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
S = input()
ans = 0

for pin in range(0,1000):
  counter = 0
  for index in range(0, N):
    if str(pin).zfill(3)[counter] == S[index]:
      counter += 1
    if counter == 3:
      ans += 1
      break
    
print(ans)

Fixed submission:
N = int(input())
S = input()
ans = 0

for pin in range(0,1000):
  counter = 0
  for index in range(0, N):
    if str(pin).zfill(3)[counter] == S[index]:
      counter += 1
    if counter == 3:
      ans += 1
      break
    
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import math

N = int(input())
S = input()
ans = 0

for pin in range(0,1000):
  counter = 0
  for s in S:
    if str(pin).zfill(3)[counter] == s:
      counter += 1
    if counter == 3:
      ans += 1
      break
    
print(ans)

Fixed submission:
N = int(input())
S = input()
ans = 0

for pin in range(0,1000):
  counter = 0
  for index in range(0, N):
    if str(pin).zfill(3)[counter] == S[index]:
      counter += 1
    if counter == 3:
      ans += 1
      break
    
print(ans)