2785 . Count on a tree MXXI

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User's AC Ratio

NaN% (0/0)

Submission's AC Ratio

NaN% (0/0)

Tags

NTU Preliminary NTU Preliminary 2017

Description

The PDF version of this problem can be downloaded here.

Input Format

Output Format

Sample Input 1

3
2
1 2
3
1 2
2 3
4
1 2
1 3
1 4

Sample Output 1

0
142857144
866666673

Hints

Problem Source

Migrated from old NTUJ.

eddy

Subtasks

No. Testdata Range Score

Testdata and Limits

No. Time Limit (ms) Memory Limit (VSS, KiB) Output Limit (KiB) Subtasks
0 1000 262144 131072
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