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 | 2025-04-15 22:47:12 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,330 bytes |
コンパイル時間 | 313 ms |
コンパイル使用メモリ | 81,912 KB |
実行使用メモリ | 75,196 KB |
最終ジャッジ日時 | 2025-04-15 22:48:30 |
合計ジャッジ時間 | 2,532 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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(): import sys input = sys.stdin.read data = input().split() idx = 0 n = int(data[idx]); idx +=1 m = int(data[idx]); idx +=1 S = int(data[idx]); idx +=1 G = int(data[idx]); idx +=1 adj = [[] for _ in range(n)] for _ in range(m): a = int(data[idx]); idx +=1 b = int(data[idx]); idx +=1 c = int(data[idx]); idx +=1 adj[a].append((b, c)) adj[b].append((a, c)) INF = float('inf') dist = [INF] * n prev = [-1] * n dist[S] = 0 heap = [] heapq.heappush(heap, (0, S)) while heap: d_u, u = heapq.heappop(heap) if d_u > dist[u]: continue for v, c in adj[u]: new_dist = d_u + 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)) # Reconstruct path path = [] current = G while current != -1: path.append(current) current = prev[current] path = path[::-1] print(' '.join(map(str, path))) if __name__ == "__main__": main()