Buggy python submission (verdict: Time Limit Exceeded):
import sys
sys.setrecursionlimit(1 << 25)
read = sys.stdin.readline
ra = range
enu = enumerate


def exit(*argv, **kwarg):
    print(*argv, **kwarg)
    sys.exit()


def mina(*argv, sub=1): return list(map(lambda x: x - sub, argv))
# 受け渡されたすべての要素からsubだけ引く.リストを*をつけて展開しておくこと


def a_int(): return int(read())


def ints(): return list(map(int, read().split()))


def read_col(H):
    '''H is number of rows
    A列、B列が与えられるようなとき
    ex1)A,B=read_col(H)    ex2) A,=read_col(H) #一列の場合'''
    ret = []
    for _ in range(H):
        ret.append(list(map(int, read().split())))
    return tuple(map(list, zip(*ret)))


from numba import njit
import numpy as np


N, K = ints()
W, V = read_col(N)
W = np.array(W, dtype=np.int64)
V = np.array(V, dtype=np.int64)


# @njit('(i8,i8,i8[:],i8[:])', cache=True)
def main(N, K, W, V):
    dp = np.zeros((N + 1, K + 1), dtype=np.int64)
    for i in range(N + 1):
        dp[i, 0] = 0

    for i in range(N):
        w, v = W[i], V[i]
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1, sum_w] = dp[i, sum_w]
            else:
                dp[i + 1, sum_w] = max(
                    dp[i, sum_w],
                    dp[i, sum_w - w] + v)
    print(dp[-1, -1])


main(N, K, W, V)


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Runtime Error):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


N, K = read_ints()
W, V = read_col(N, 2)

import numpy as np
# 流れ
# dpテーブルのサイズを決める
#     (N,max(V)*N)
# dpテーブルの初期化
# dpテーブルの更新
#     いままでと同じ
#     sum_v以上を達成すhるように選んだときのsum_wの最小値を保持する
# 答えの抽出
# dpでW以下かつ最大価値が最大(sum_v)なものが答え


dp = np.full((N+1, np.max(V) * N+1), float('inf'))
# dp[:, 0] = 0
dp[0][0] = 0

from itertools import product

for i, sum_v in product(range(N), range(np.max(V) * N+1)):
    if sum_v - V[i] < 0:
        dp[i + 1, sum_v] = dp[i, sum_v]
    else:
        # print(i, sum_v)
        dp[i + 1, sum_v] = min(
            dp[i, sum_v],
            dp[i, sum_v-V[i]]+W[i]
        )

# print(dp)
print(np.where((dp <= K).sum(axis=0) != 0)[0].max())
# print(max(np.where((dp < K).sum(axis=0) != 0)))
# print(max(np.where((dp < K).sum(axis=0) != 0)))


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()
    # W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()
    # W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()
    # W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()
    W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for sum_w in range(K + 1):
        for i in range(N):
            if sum_w - W[i] < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - W[i]] + V[i]
                )
    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()
    W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for sum_w in range(K + 1):
        for i in range(N):
            if sum_w - W[i] > -1:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - W[i]] + V[i]
                )
            else:
                dp[i + 1][sum_w] = dp[i][sum_w]

    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():

    N, K = read_ints()
    W, V = read_col(N, 2)

    dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for sum_w in range(K + 1):
        for i, (w, v) in enumerate(zip(W, V)):
            if sum_w - W[i] > -1:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v
                )
            else:
                dp[i + 1][sum_w] = dp[i][sum_w]

    print(dp[-1][-1])


main()


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


N, K = read_ints()
W, V = read_col(N, 2)


dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

dp[0] = [0] * (K + 1)
for i in range(N + 1):
    dp[i][0] = 0

for sum_w in range(K + 1):
    for i, (w, v) in enumerate(zip(W, V)):
        if sum_w - W[i] > -1:
            dp[i + 1][sum_w] = max(
                dp[i][sum_w],
                dp[i][sum_w - w] + v
            )
        else:
            dp[i + 1][sum_w] = dp[i][sum_w]

print(dp[-1][-1])


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


N, K = read_ints()
W, V = read_col(N, 2)


dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

dp[0] = [0] * (K + 1)
for i in range(N + 1):
    dp[i][0] = 0

for sum_w in range(K + 1):
    for i, (w, v) in enumerate(zip(W, V)):
        if sum_w - W[i] > -1:
            dp[i + 1][sum_w] = max(
                dp[i][sum_w],
                dp[i][sum_w - w] + v
            )
        else:
            dp[i + 1][sum_w] = dp[i][sum_w]

print(dp[-1][-1])


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE

Buggy python submission (verdict: Time Limit Exceeded):
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


N, K = read_ints()
W, V = read_col(N, 2)


dp = [[-float('inf') for _ in range(K + 1)] for _ in range(N + 1)]

dp[0] = [0] * (K + 1)
for i in range(N + 1):
    dp[i][0] = 0

for sum_w in range(K + 1):
    for i in range(N):
        if sum_w - W[i] > -1:
            dp[i + 1][sum_w] = max(
                dp[i][sum_w],
                dp[i][sum_w - W[i]] + V[i]
            )
        else:
            dp[i + 1][sum_w] = dp[i][sum_w]

print(dp[-1][-1])


Fixed submission:
import sys
read = sys.stdin.readline


def read_ints():
    return list(map(int, input().split()))


def read_a_int():
    return int(read())


def read_matrix(H):
    '''
    H is number of rows
    '''
    return [list(map(int, read().split())) for _ in range(H)]


def read_map(H):
    '''
    H is number of rows
    文字列で与えられた盤面を読み取る用
    '''
    return [read() for _ in range(H)]


def read_col(H, n_cols):
    '''
    H is number of rows
    n_cols is number of cols

    A列、B列が与えられるようなとき
    '''
    ret = [[] for _ in range(n_cols)]
    for _ in range(H):
        tmp = list(map(int, read().split()))
        for col in range(n_cols):
            ret[col].append(tmp[col])

    return ret


def main():
    N, K = read_ints()

    dp = [[-10 for _ in range(K + 1)] for _ in range(N + 1)]

    dp[0] = [0] * (K + 1)
    for i in range(N + 1):
        dp[i][0] = 0

    for i in range(N):
        w, v = read_ints()
        for sum_w in range(K + 1):
            if sum_w - w < 0:
                dp[i + 1][sum_w] = dp[i][sum_w]
            else:
                dp[i + 1][sum_w] = max(
                    dp[i][sum_w],
                    dp[i][sum_w - w] + v)
    print(dp[-1][-1])


main()

# pythonでもpypyでもTLE