結果
問題 |
No.614 壊れたキャンパス
|
ユーザー |
![]() |
提出日時 | 2025-03-20 20:42:11 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,133 bytes |
コンパイル時間 | 141 ms |
コンパイル使用メモリ | 82,792 KB |
実行使用メモリ | 361,260 KB |
最終ジャッジ日時 | 2025-03-20 20:42:40 |
合計ジャッジ時間 | 23,826 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 14 TLE * 6 |
ソースコード
import sys from heapq import heappush, heappop from collections import defaultdict def main(): input = sys.stdin.read().split() idx = 0 N = int(input[idx]); idx += 1 M = int(input[idx]); idx += 1 K = int(input[idx]); idx += 1 S = int(input[idx]); idx += 1 T = int(input[idx]); idx += 1 bridges = [] for _ in range(M): a = int(input[idx]); idx += 1 b = int(input[idx]); idx += 1 c = int(input[idx]); idx += 1 bridges.append((a, b, c)) # Initialize important floors for each building building_floors = [[] for _ in range(N + 2)] # 1-based indexing building_floors[1].append(S) building_floors[N].append(T) for a, b, c in bridges: building_floors[a].append(b) building_floors[a + 1].append(c) # Sort and deduplicate each building's floors for j in range(1, N + 1): floors = building_floors[j] floors = sorted(list(set(floors))) building_floors[j] = floors # Build adjacency list adj = defaultdict(list) for j in range(1, N + 1): floors = building_floors[j] for i in range(len(floors) - 1): f_prev = floors[i] f_next = floors[i + 1] delta = f_next - f_prev adj[(j, f_prev)].append(((j, f_next), delta)) adj[(j, f_next)].append(((j, f_prev), delta)) # Add bridge edges for a, b, c in bridges: adj[(a, b)].append(((a + 1, c), 0)) # Dijkstra's algorithm dist = defaultdict(lambda: float('inf')) start = (1, S) dist[start] = 0 heap = [] heappush(heap, (0, 1, S)) target = (N, T) while heap: current_cost, j, f = heappop(heap) if (j, f) == target: print(current_cost) return if current_cost > dist[(j, f)]: continue for (nj, nf), delta in adj.get((j, f), []): new_cost = current_cost + delta if new_cost < dist[(nj, nf)]: dist[(nj, nf)] = new_cost heappush(heap, (new_cost, nj, nf)) print(-1) if __name__ == '__main__': main()