Submission #44139844

Source Code Expand

N = gets.to_i
C = Array.new(N){[]}
(N-1).times{
	a,b = gets.split.map{_1.to_i-1}
	C[a]<<b
	C[b]<<a
}
F = lambda{|a,p|
	st = sz = 0
	C[a].each{|c|
		next if c==p
		ct,cz = F[c,a]
		st += ct + cz*sz
		sz += cz
	}
	st += sz*(N-sz-1)
	sz += 1
	next st,sz
}

p N*(N-1)*(N-2)/6-F[0,0][0]

Submission Info

Submission Time
Task G - Avoid Straight Line
User ds14050
Language Ruby (2.7.1)
Score 550
Code Size 303 Byte
Status AC
Exec Time 634 ms
Memory 199636 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 550 / 550
Status
AC × 3
AC × 40
Set Name Test Cases
Sample sample00.txt, sample01.txt, sample02.txt
All sample00.txt, sample01.txt, sample02.txt, testcase00.txt, testcase01.txt, testcase02.txt, testcase03.txt, testcase04.txt, testcase05.txt, testcase06.txt, testcase07.txt, testcase08.txt, testcase09.txt, testcase10.txt, testcase11.txt, testcase12.txt, testcase13.txt, testcase14.txt, testcase15.txt, testcase16.txt, testcase17.txt, testcase18.txt, testcase19.txt, testcase20.txt, testcase21.txt, testcase22.txt, testcase23.txt, testcase24.txt, testcase25.txt, testcase26.txt, testcase27.txt, testcase28.txt, testcase29.txt, testcase30.txt, testcase31.txt, testcase32.txt, testcase33.txt, testcase34.txt, testcase35.txt, testcase36.txt
Case Name Status Exec Time Memory
sample00.txt AC 60 ms 14044 KiB
sample01.txt AC 57 ms 14168 KiB
sample02.txt AC 54 ms 13992 KiB
testcase00.txt AC 61 ms 14208 KiB
testcase01.txt AC 57 ms 14064 KiB
testcase02.txt AC 56 ms 14104 KiB
testcase03.txt AC 308 ms 129552 KiB
testcase04.txt AC 634 ms 154184 KiB
testcase05.txt AC 516 ms 117260 KiB
testcase06.txt AC 549 ms 199636 KiB
testcase07.txt AC 212 ms 25520 KiB
testcase08.txt AC 322 ms 31644 KiB
testcase09.txt AC 239 ms 26064 KiB
testcase10.txt AC 317 ms 31556 KiB
testcase11.txt AC 223 ms 24344 KiB
testcase12.txt AC 334 ms 30040 KiB
testcase13.txt AC 272 ms 25240 KiB
testcase14.txt AC 336 ms 30648 KiB
testcase15.txt AC 250 ms 31980 KiB
testcase16.txt AC 349 ms 41400 KiB
testcase17.txt AC 229 ms 30832 KiB
testcase18.txt AC 354 ms 40700 KiB
testcase19.txt AC 250 ms 25952 KiB
testcase20.txt AC 330 ms 33016 KiB
testcase21.txt AC 197 ms 24444 KiB
testcase22.txt AC 332 ms 32696 KiB
testcase23.txt AC 279 ms 80168 KiB
testcase24.txt AC 472 ms 126656 KiB
testcase25.txt AC 488 ms 111396 KiB
testcase26.txt AC 410 ms 87612 KiB
testcase27.txt AC 285 ms 27880 KiB
testcase28.txt AC 345 ms 34136 KiB
testcase29.txt AC 231 ms 26692 KiB
testcase30.txt AC 343 ms 34188 KiB
testcase31.txt AC 213 ms 26128 KiB
testcase32.txt AC 346 ms 34224 KiB
testcase33.txt AC 345 ms 34044 KiB
testcase34.txt AC 345 ms 34352 KiB
testcase35.txt AC 320 ms 32916 KiB
testcase36.txt AC 345 ms 34276 KiB