結果
| 問題 |
No.3013 ハチマキ買い星人
|
| ユーザー |
|
| 提出日時 | 2025-01-25 17:47:48 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,757 bytes |
| コンパイル時間 | 362 ms |
| コンパイル使用メモリ | 82,884 KB |
| 実行使用メモリ | 275,724 KB |
| 最終ジャッジ日時 | 2025-01-26 00:00:36 |
| 合計ジャッジ時間 | 84,740 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge7 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 20 TLE * 25 |
ソースコード
# library from https://prd-xxx.hateblo.jp/entry/2019/06/24/235844
import heapq
class Reverse:
def __init__(self, val):
self.val = val
def __lt__(self, other):
return self.val > other.val
def __repr__(self):
return repr(self.val)
class Heapq:
def __init__(self, arr, desc = False):
if desc:
for i in range(len(arr)):
arr[i] = Reverse(arr[i])
self.desc = desc
self.hq = arr
heapq.heapify(self.hq)
def pop(self):
if self.desc: return heapq.heappop(self.hq).val
else: return heapq.heappop(self.hq)
def push(self, a):
if self.desc: heapq.heappush(self.hq, Reverse(a))
else: heapq.heappush(self.hq, a)
def top(self):
if self.desc: self.hq[0].val
else: return self.hq[0]
n,m,p,y = map(int, input().split())
abc = [list(map(int, input().split())) for i in range(m)]
de = [list(map(int, input().split())) for i in range(p)]
graph = [[] for i in range(n)]
for a,b,c in abc:
a -= 1
b -= 1
graph[a].append((b,c))
graph[b].append((a,c))
# hachi = [1 << 60 for i in range(n)]
# for d,e in de:
# d -= 1
# hachi[d] = e
state = [1 << 60 for i in range(n)]
state[0] = 0
heap = Heapq([], desc=True)
heap.push((0, 0))
while heap.hq:
cost, city = heap.pop()
if state[city] < cost:
continue
for ncity, nc in graph[city]:
ncost = cost + nc
if state[ncity] <= ncost:
continue
state[ncity] = ncost
heap.push((ncost, ncity))
ans = 0
for d,e in de:
d -= 1
cost = state[d]
if cost > y:
continue
res = y - cost
tans = res // e
ans = max(ans, tans)
print(ans)