結果
| 問題 |
No.1316 Maximum Minimum Spanning Tree
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-08 10:46:13 |
| 言語 | Python3 (3.13.1 + numpy 2.2.1 + scipy 1.14.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,225 bytes |
| コンパイル時間 | 284 ms |
| コンパイル使用メモリ | 12,672 KB |
| 実行使用メモリ | 11,008 KB |
| 最終ジャッジ日時 | 2024-12-27 14:58:15 |
| 合計ジャッジ時間 | 5,172 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 * 1 WA * 1 RE * 2 |
| other | AC * 1 WA * 1 RE * 76 |
ソースコード
def parse_input(input_str):
lines = input_str.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")
best_x = None
for x1 in range(10):
for x2 in range(10):
for x3 in range(10):
modified_edges = []
total_penalty = 0
for idx, (a, b, c, d) in enumerate(edges):
x = [x1, x2, x3][idx]
modified_edges.append((a, b, c + x))
total_penalty += d * x
mst_weight = kruskal(N, modified_edges)
score = K * mst_weight - total_penalty
if score > max_score:
max_score = score
best_x = (x1, x2, x3)
return int(max_score) if max_score != float("-inf") else -1
def main():
import sys
input = sys.stdin.read
input_str = input()
N, M, K, edges = parse_input(input_str)
result = calculate_maximum_score(N, M, K, edges)
print(result)
if __name__ == "__main__":
main()