Submission #992823


Source Code Expand

from sys import exit, setrecursionlimit
from functools import reduce
from itertools import *
from collections import defaultdict
from bisect import bisect

def read():
  return int(input())

def reads():
  return [int(x) for x in input().split()]

setrecursionlimit(1000000)

(N, M) = reads()

d = defaultdict(list)
V = set()

for i in range(N):
  V.add(("p", i+1))
for j in range(M):
  V.add(("l", j+1))

for i in range(1, N+1):
  Ls = reads()[1:]
  for j in Ls:
    d[("l", j)].append(("p", i))
    d[("p", i)].append(("l", j))

def walk(v):
  V.discard(v)
  for w in d[v]:
    if w in V:
      walk(w)

# for (k, v) in d.items():
#   print(k, v)

v = ("p", 1)
walk(v)

# print(V)

print("NO" if len([v for v in V if v[0] == "p"]) > 0 else "YES")

Submission Info

Submission Time
Task C - Interpretation
User ukikagi
Language Python (3.4.3)
Score 400
Code Size 794 Byte
Status AC
Exec Time 946 ms
Memory 76524 KB

Judge Result

Set Name sample dataset1 dataset2
Score / Max Score 0 / 0 200 / 200 200 / 200
Status
AC × 2
AC × 12
AC × 25
Set Name Test Cases
sample sample-01.txt, sample-02.txt
dataset1 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt
dataset2 sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt
Case Name Status Exec Time Memory
01-01.txt AC 308 ms 3828 KB
01-02.txt AC 30 ms 4064 KB
01-03.txt AC 35 ms 4432 KB
01-04.txt AC 34 ms 4128 KB
01-05.txt AC 33 ms 4136 KB
01-06.txt AC 33 ms 4280 KB
01-07.txt AC 32 ms 4188 KB
01-08.txt AC 33 ms 4268 KB
01-09.txt AC 33 ms 4152 KB
01-10.txt AC 35 ms 4256 KB
02-01.txt AC 445 ms 56748 KB
02-02.txt AC 864 ms 60300 KB
02-03.txt AC 423 ms 54888 KB
02-04.txt AC 768 ms 63724 KB
02-05.txt AC 825 ms 66928 KB
02-06.txt AC 764 ms 63612 KB
02-07.txt AC 852 ms 60312 KB
02-08.txt AC 783 ms 57812 KB
02-09.txt AC 946 ms 76524 KB
02-10.txt AC 639 ms 59092 KB
02-11.txt AC 632 ms 58916 KB
02-12.txt AC 644 ms 57584 KB
02-13.txt AC 645 ms 57740 KB
sample-01.txt AC 27 ms 3700 KB
sample-02.txt AC 27 ms 3700 KB