Buggy python submission (verdict: Runtime Error):
import itertools as it

def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    # 累積和
    scores = it.accumulate([0]+[C[i] for i in cycle])
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[1:K+1])
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[1:])
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))



Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    # または、1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if K <= len(cycle) or score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))



Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルの長さ
    cycle_len = len(cycle)
    # 1サイクルごとのスコア
    score_per_cycle = scores[cycle_len]
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle < 0:
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1サイクルのスコア
    scores_last_cycle = []
    # 最後の1cycleの値を調べる
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))



Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Time Limit Exceeded):


def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [0]
    for l in range(1, K+1):
        i = P[i]
        score = scores[l-1] + C[i]
        scores.append(score)
    scores[0] = -10**9
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):


def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**9] * (K+10000)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**9
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):


def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**9] * (K+10000)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

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

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**9] * (10**5)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

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

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
K = 10**9
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**9] * (K+1)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

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

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**12] * (K+10)
    # scores[0] = 0
    # for l in range(1, K+1):
    #     i = P[i]
    #     scores[l] = scores[l-1] + C[i]
    # scores[0] = -10**12
    # max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

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

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**12] * (K+10)
    scores[0] = 0
    # for l in range(1, K+1):
    #     i = P[i]
    #     scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

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

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li() + [0]*10
C = [0] + li() + [0]*10
max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**12] * (K+10)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**6)

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()

max_scores = [-10**12] * (N+10)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**12] * (K+10)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**6)
import itertools as it
import collections as cl
import math
from functools import reduce

def li():
    return [int(x) for x in input().split()]


N, K = li()
P = [0] + li()
C = [0] + li()

max_scores = [-10**12] * (N+1)
for init_i in range(1, N+1):
    i = init_i
    scores = [-10**12] * (K+1)
    scores[0] = 0
    for l in range(1, K+1):
        i = P[i]
        scores[l] = scores[l-1] + C[i]
    scores[0] = -10**12
    max_scores[i] = max(scores)
print(max(max_scores))

Fixed submission:
def li():
    return [int(x) for x in input().split()]

N, K = li()
P = [0] + li()
C = [0] + li()

def get_cycle(start_i):
    cycle = []
    i = start_i
    while True:
        i = P[i]
        if i == start_i:
            break
        cycle.append(i)
    cycle.append(start_i)
    return cycle

def get_cycle_scores(cycle):
    score = 0
    scores = [score]
    for i in cycle:
        score += C[i]
        scores.append(score)
    return scores

max_scores = []
for start_i in range(1,N+1):
    cycle = get_cycle(start_i)
    scores = get_cycle_scores(cycle)
    cycle_len = len(cycle)
    score_per_cycle = scores[cycle_len]
    # 1cycle以下の場合は全て調べればよし
    if K <= len(cycle):
        max_score = max(scores[move] for move in range(1, K+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがマイナスならサイクルを回らないのがハイスコア
    if score_per_cycle <= 0:
        max_score = max(scores[move] for move in range(1, cycle_len+1))
        max_scores.append(max_score)
        continue
    # 1サイクルごとのスコアがプラスなら限界までサイクルを回るのがハイスコア
    # ラスト1cycleのスコアを調べる
    scores_last_cycle = []
    for move in range(K-cycle_len+1, K+1):
        # 何周したか
        loop_cnt = move // cycle_len
        # あまり
        rest_move = move % cycle_len
        # スコア = 1周ごとのスコア * 何周したか + あまり
        score = loop_cnt * score_per_cycle + scores[rest_move]
        scores_last_cycle.append(score)

    max_scores.append(max(scores_last_cycle))

print(max(max_scores))