Submission #1070777


Source Code Expand

ABs = readlines.drop(1).map{|l| l.split.map(&:to_i)}
MOD = 1_000_000_007

def go(x, p)
  f, g = (@m[x] - [p]).inject([1, 1]){|ary, y| ary.zip(go(y, x)).map{|a, b| a*b}}
  [g % MOD, (f + g) % MOD]
end

@m = ABs.each_with_object(Hash.new{|h, k| h[k] = []}) do |(a, b), h|
  a -= 1; b -= 1
  h[a] << b; h[b] << a
end
puts go(0, -1)[1]

Submission Info

Submission Time
Task D - 塗り絵
User noriakiokubo
Language Ruby (2.3.3)
Score 100
Code Size 332 Byte
Status AC
Exec Time 507 ms
Memory 35052 KB

Judge Result

Set Name All
Score / Max Score 100 / 100
Status
AC × 22
Set Name Test Cases
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt
Case Name Status Exec Time Memory
000.txt AC 13 ms 1916 KB
001.txt AC 11 ms 1788 KB
002.txt AC 355 ms 32536 KB
003.txt AC 461 ms 34924 KB
004.txt AC 287 ms 21628 KB
005.txt AC 458 ms 35052 KB
006.txt AC 432 ms 34684 KB
007.txt AC 457 ms 34924 KB
008.txt AC 326 ms 31056 KB
009.txt AC 455 ms 34796 KB
010.txt AC 330 ms 31740 KB
011.txt AC 484 ms 34668 KB
012.txt AC 258 ms 19164 KB
013.txt AC 507 ms 34924 KB
014.txt AC 264 ms 18956 KB
015.txt AC 463 ms 35052 KB
016.txt AC 277 ms 20632 KB
017.txt AC 460 ms 34796 KB
018.txt AC 83 ms 7804 KB
019.txt AC 467 ms 34924 KB
020.txt AC 53 ms 4860 KB
021.txt AC 466 ms 34924 KB