結果
問題 | No.1301 Strange Graph Shortest Path |
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)