結果
| 問題 |
No.614 壊れたキャンパス
|
| コンテスト | |
| ユーザー |
lam6er
|
| 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()
lam6er