結果
問題 | No.19 ステージの選択 |
ユーザー | zundamo-ti |
提出日時 | 2021-01-08 06:52:23 |
言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
結果 |
AC
|
実行時間 | 31 ms / 5,000 ms |
コード長 | 1,788 bytes |
コンパイル時間 | 267 ms |
コンパイル使用メモリ | 12,928 KB |
実行使用メモリ | 11,008 KB |
最終ジャッジ日時 | 2024-11-15 06:36:29 |
合計ジャッジ時間 | 1,793 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | AC | 31 ms
11,008 KB |
testcase_01 | AC | 30 ms
10,880 KB |
testcase_02 | AC | 29 ms
10,880 KB |
testcase_03 | AC | 28 ms
10,752 KB |
testcase_04 | AC | 28 ms
10,880 KB |
testcase_05 | AC | 28 ms
10,880 KB |
testcase_06 | AC | 28 ms
10,880 KB |
testcase_07 | AC | 29 ms
10,880 KB |
testcase_08 | AC | 29 ms
10,880 KB |
testcase_09 | AC | 30 ms
10,880 KB |
testcase_10 | AC | 29 ms
10,880 KB |
testcase_11 | AC | 29 ms
10,880 KB |
testcase_12 | AC | 28 ms
10,880 KB |
testcase_13 | AC | 29 ms
10,880 KB |
testcase_14 | AC | 30 ms
10,880 KB |
testcase_15 | AC | 29 ms
10,880 KB |
testcase_16 | AC | 29 ms
10,880 KB |
testcase_17 | AC | 30 ms
10,880 KB |
testcase_18 | AC | 28 ms
11,008 KB |
testcase_19 | AC | 30 ms
10,880 KB |
testcase_20 | AC | 29 ms
10,752 KB |
testcase_21 | AC | 27 ms
10,880 KB |
testcase_22 | AC | 28 ms
10,752 KB |
testcase_23 | AC | 28 ms
10,880 KB |
ソースコード
import sys sys.setrecursionlimit(10**9) readline = sys.stdin.readline def dfs(x, G, visited, log): visited[x] = True for y in G[x]: if visited[y]: continue dfs(y, G, visited, log) log.append(x) def main(): N = int(readline()) fr = [[] for _ in range(N)] to = [[] for _ in range(N)] difficulty = [0]*N for x in range(N): d, y = map(int, readline().split()) y -= 1 fr[x].append(y) to[y].append(x) difficulty[x] = d visited = [False]*N log = [] for x in range(N): if visited[x]: continue dfs(x, to, visited, log) log.reverse() visited = [False]*N groups = [] for x in log: if visited[x]: continue group = [] dfs(x, fr, visited, group) groups.append(group) I = len(groups) V_to_I = [-1]*N diff_of_I = [-1]*I for i, group in enumerate(groups): min_diff = 1000 sum_diff = 0 for x in group: V_to_I[x] = i min_diff = min(min_diff, difficulty[x]) sum_diff += difficulty[x] diff_of_I[i] = (min_diff + sum_diff) / 2 DAG = [[] for _ in range(I)] for x in range(N): i = V_to_I[x] for y in to[x]: j = V_to_I[y] if i != j: DAG[i].append(j) ans = 0 visited = [False]*I for i in range(I): if visited[i]: continue component = [] dfs(i, DAG, visited, component) component.reverse() for i, c in enumerate(component): if i == 0: ans += diff_of_I[c] else: ans += diff_of_I[c] / 2 print(ans) if __name__ == "__main__": main()