結果
問題 | No.1316 Maximum Minimum Spanning Tree |
ユーザー | lydialitvyak |
提出日時 | 2024-06-08 10:39:57 |
言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,875 bytes |
コンパイル時間 | 102 ms |
コンパイル使用メモリ | 12,800 KB |
実行使用メモリ | 10,880 KB |
最終ジャッジ日時 | 2024-06-08 10:40:14 |
合計ジャッジ時間 | 5,889 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | AC | 29 ms
10,752 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | WA | - |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
testcase_44 | WA | - |
testcase_45 | WA | - |
testcase_46 | WA | - |
testcase_47 | WA | - |
testcase_48 | WA | - |
testcase_49 | WA | - |
testcase_50 | WA | - |
testcase_51 | WA | - |
testcase_52 | WA | - |
testcase_53 | WA | - |
testcase_54 | WA | - |
testcase_55 | WA | - |
testcase_56 | WA | - |
testcase_57 | WA | - |
testcase_58 | WA | - |
testcase_59 | WA | - |
testcase_60 | WA | - |
testcase_61 | WA | - |
testcase_62 | WA | - |
testcase_63 | WA | - |
testcase_64 | WA | - |
testcase_65 | WA | - |
testcase_66 | WA | - |
testcase_67 | WA | - |
testcase_68 | WA | - |
testcase_69 | WA | - |
testcase_70 | WA | - |
testcase_71 | WA | - |
testcase_72 | WA | - |
testcase_73 | WA | - |
testcase_74 | WA | - |
testcase_75 | WA | - |
testcase_76 | WA | - |
testcase_77 | WA | - |
testcase_78 | WA | - |
testcase_79 | WA | - |
testcase_80 | WA | - |
testcase_81 | WA | - |
ソースコード
def parse_input(): import sys input = sys.stdin.read lines = input().strip().split('\n') N, M, K = map(int, lines[0].split()) edges = [] for i in range(1, M + 1): a, b, c, d = map(int, lines[i].split()) edges.append((a, b, c, d)) return N, M, K, edges def find(parent, i): if parent[i] == i: return i else: parent[i] = find(parent, parent[i]) return parent[i] def union(parent, rank, x, y): root_x = find(parent, x) root_y = find(parent, y) if root_x != root_y: if rank[root_x] > rank[root_y]: parent[root_y] = root_x elif rank[root_x] < rank[root_y]: parent[root_x] = root_y else: parent[root_y] = root_x rank[root_x] += 1 def kruskal(N, edges): parent = [i for i in range(N + 1)] rank = [0] * (N + 1) mst_weight = 0 edge_count = 0 for a, b, weight in sorted(edges, key=lambda x: x[2]): if find(parent, a) != find(parent, b): union(parent, rank, a, b) mst_weight += weight edge_count += 1 if edge_count == N - 1: break if edge_count == N - 1: return mst_weight else: return float('inf') def calculate_maximum_score(N, M, K, edges): max_score = float('-inf') for edge in edges: a, b, c, d = edge x_opt = c / (K + d) adjusted_edges = [(a, b, c + x_opt) for (a, b, c, d) in edges] mst_weight = kruskal(N, adjusted_edges) score = K * mst_weight - sum(d * x_opt for _, _, _, d in edges) max_score = max(max_score, score) return int(max_score) if max_score != float('-inf') else -1 def main(): N, M, K, edges = parse_input() result = calculate_maximum_score(N, M, K, edges) print(result) if __name__ == "__main__": main()