結果

問題 No.1 道のショートカット
ユーザー warashi
提出日時 2015-02-08 22:16:49
言語 Python3
(3.13.1 + numpy 2.2.1 + scipy 1.14.1)
結果
WA  
実行時間 -
コード長 1,854 bytes
コンパイル時間 88 ms
コンパイル使用メモリ 13,056 KB
実行使用メモリ 11,392 KB
最終ジャッジ日時 2024-07-08 03:45:33
合計ジャッジ時間 2,735 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 19 WA * 21
権限があれば一括ダウンロードができます

ソースコード

diff # 

#!/usr/bin/env python3
def memoize(fn):
    table = {}

    def func(*args):
        if args not in table:
            table[args] = fn(*args)
        return table[args]
    return func


class Town(object):

    def __init__(self, num):
        self.edge = []
        self.num = num
        self.is_start = False
        self.is_goal = False

    def append(self, edge):
        self.edge.append(edge)


class Edge(object):

    def __init__(self, frm, to, cost, distance):
        self.frm = frm
        self.to = to
        self.cost = cost
        self.distance = distance
        self.used = False


def forward(walk, now, yen):
    path = [e for e in now.edge if not e.used and yen >= e.cost]
    if len(path) == 0:
        return (walk, now, yen, True)
    edge = min(path, key=lambda x: (x.distance / (x.to.num - now.num)))
    edge.used = True
    walk.append(edge)
    now = edge.to
    yen -= edge.cost
    return (walk, now, yen, False)


def back(walk, now, yen):
    if now.is_start:
        return (walk, now, yen, True)
    for e in now.edge:
        e.used = False
    e = walk.pop()
    now = e.frm
    yen -= e.cost
    return (walk, now, yen, False)

N = int(input())
C = int(input())
V = int(input())
S = [int(s) for s in input().split()]
T = [int(t) for t in input().split()]
Y = [int(y) for y in input().split()]
M = [int(m) for m in input().split()]

town = [Town(num) for num in range(N)]
RODE = zip(S, T, Y, M)
for s, t, y, m in RODE:
    town[s - 1].append(Edge(town[s - 1], town[t - 1], y, m))
town[0].is_start = True
town[-1].is_goal = True

walk = []
now = town[0]
yen = C
while not now.is_goal:
    walk, now, yen, err = forward(walk, now, yen)
    if err:
        walk, now, yen, err = back(walk, now, yen)
        if err:
            print(-1)
            break
if now.is_goal:
    print(sum([e.distance for e in walk]))
0