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

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            dp[i+1][j][k] += dp[i][j][k]
            dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)

Buggy python submission (verdict: Runtime Error):
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(2500+１０)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            dp[i+1][j][k] += dp[i][j][k]
            dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)

Buggy python submission (verdict: Runtime Error):
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(３０１０)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            dp[i+1][j][k] += dp[i][j][k]
            dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)

Buggy python submission (verdict: Runtime Error):
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(2500+10)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            dp[i+1][j][k] += dp[i][j][k]
            dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from itertools import combinations

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

V = []
for x in X:
    V.append(x - A)

ans = 0
for r in range(1, len(V)+1):
    C = list(combinations(V, r))
    for c in C:
        if sum(c) == 0:
            ans += 1
print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from itertools import combinations

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

V = []
for x in X:
    V.append(x - A)

ans = 0
for r in range(1, len(V)+1):
    C = list(combinations(V, r))
    for c in C:
        if sum(c) == 0:
            ans += 1
print(ans)


Fixed submission:
# 配るDP
N, A = map(int, input().split())
X = list(map(int, input().split()))

dp = [[[0 for _ in range(3010)] for __ in range(N+1)] for ___ in range(N+1)]

dp[0][0][0] = 1

for i in range(N):
    for j in range(N):
        for k in range(2500+1):
            if dp[i][j][k]:
                dp[i+1][j][k] += dp[i][j][k]
                dp[i+1][j+1][k+X[i]] += dp[i][j][k]

ans = 0
for n in range(1, N+1):
    ans += dp[N][n][n*A]

print(ans)