結果
問題 |
No.2387 Yokan Factory
|
ユーザー |
|
提出日時 | 2024-01-07 13:30:39 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 3,707 ms / 5,000 ms |
コード長 | 1,406 bytes |
コンパイル時間 | 344 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 268,972 KB |
最終ジャッジ日時 | 2024-09-27 19:22:43 |
合計ジャッジ時間 | 33,079 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 35 |
ソースコード
## https://yukicoder.me/problems/no/2387 import heapq def solve(N, next_node, X, width): fix = {} seen = {0:0} queue= [] heapq.heappush(queue, (0, 0)) while len(queue) > 0: cost, v = heapq.heappop(queue) if v in fix: continue fix[v] = cost for next_v, a, b in next_node[v]: if next_v in fix: continue if b < width: continue new_cost = cost + a if next_v not in seen or seen[next_v] > new_cost: seen[next_v] = new_cost heapq.heappush(queue, (new_cost, next_v)) if (N - 1) not in fix: return False else: return fix[N - 1] <= X def main(): N, M, X = map(int, input().split()) next_node = [[] for _ in range(N)] max_b = 0 for _ in range(M): u, v, a,b= map(int, input().split()) next_node[u - 1].append((v - 1, a, b)) next_node[v - 1].append((u - 1, a, b)) max_b = max(max_b, b) low = 0 high = max_b while high - low > 1: mid = (high + low) // 2 if solve(N, next_node, X, mid): low = mid else: high = mid if solve(N, next_node, X, high): v = high else: v = low if v == 0: print(-1) else: print(v) if __name__ == "__main__": main()