結果
| 問題 |
No.1301 Strange Graph Shortest Path
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-10-27 00:55:32 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,221 bytes |
| コンパイル時間 | 369 ms |
| コンパイル使用メモリ | 82,404 KB |
| 実行使用メモリ | 277,540 KB |
| 最終ジャッジ日時 | 2024-10-27 00:57:11 |
| 合計ジャッジ時間 | 95,645 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 16 WA * 4 TLE * 13 |
ソースコード
from heapq import heappop, heappush
N, M = map(int, input().split())
graph = [[] for _ in range(N)]
pos = {}
for _ in range(M):
a, b, c, d = map(int, input().split())
a -= 1; b -= 1
pos[a, b, c] = len(graph[a])
pos[b, a, c] = len(graph[b])
graph[a].append([b, c])
graph[b].append([a, c])
pos[a, b, d] = len(graph[a])
pos[b, a, d] = len(graph[b])
graph[a].append([b, d])
graph[b].append([a, d])
D = [[-1, None] for _ in range(N+1)]
hq = [(0, 0, None)]
while hq:
d, node, par = heappop(hq)
if D[node][0] != -1:
continue
D[node] = [d, par]
for nex, c in graph[node]:
if D[nex][0] == -1:
heappush(hq, (D[node][0]+c, nex, node))
INF = 10**10
ans = D[N-1][0]
now = N-1
while now:
d, par = D[now]
c = d - D[par][0]
i1 = pos[par, now, c]
i2 = pos[now, par, c]
graph[par][i1][1] = graph[now][i2][1] = INF
now = par
D = [[-1, None] for _ in range(N)]
hq = [(0, N-1, None)]
while hq:
d, node, par = heappop(hq)
if D[node][0] != -1:
continue
D[node] = [d, par]
for nex, c in graph[node]:
if D[nex][0] == -1:
heappush(hq, (D[node][0]+c, nex, node))
print(D[0][0]+ans)