結果
問題 |
No.160 最短経路のうち辞書順最小
|
ユーザー |
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提出日時 | 2025-03-31 17:25:47 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,216 bytes |
コンパイル時間 | 221 ms |
コンパイル使用メモリ | 82,388 KB |
実行使用メモリ | 77,660 KB |
最終ジャッジ日時 | 2025-03-31 17:26:57 |
合計ジャッジ時間 | 3,472 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 8 WA * 18 |
ソースコード
import heapq def main(): N, M, S, G = map(int, input().split()) edges = [[] for _ in range(N)] for _ in range(M): a, b, c = map(int, input().split()) edges[a].append((b, c)) edges[b].append((a, c)) INF = float('inf') dist = [INF] * N prev = [-1] * N dist[S] = 0 heap = [] heapq.heappush(heap, (0, S)) while heap: current_dist, u = heapq.heappop(heap) if current_dist > dist[u]: continue for v, c in edges[u]: new_dist = current_dist + c if new_dist < dist[v]: dist[v] = new_dist prev[v] = u heapq.heappush(heap, (new_dist, v)) elif new_dist == dist[v]: if prev[v] == -1 or u < prev[v]: prev[v] = u heapq.heappush(heap, (new_dist, v)) path = [] current = G while current != S: path.append(current) current = prev[current] if current == -1: break # This case won't occur as per problem constraints path.append(S) path = path[::-1] print(' '.join(map(str, path))) if __name__ == "__main__": main()