Submission #10369560


Source Code Expand

n,m=map(int,input().split())
arr=[list(map(int,input().split())) for _ in range(m)]
count=[1]*(n+1)
flag=[False]*(n+1)
flag[1]=True
for a,b in arr:
  count[b]+=1
  count[a]-=1
  if flag[a]==True:
    flag[b]==True
  if count[a]==0:
    flag[a]==False
print(flag.count(True))

Submission Info

Submission Time
Task B - Box and Ball
User tanon710
Language Python (3.4.3)
Score 0
Code Size 286 Byte
Status WA
Exec Time 360 ms
Memory 28964 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 400
Status
AC × 1
WA × 2
AC × 4
WA × 23
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt
Case Name Status Exec Time Memory
0_00.txt WA 17 ms 3064 KB
0_01.txt AC 17 ms 3064 KB
0_02.txt WA 17 ms 3064 KB
1_00.txt AC 17 ms 3064 KB
1_01.txt AC 17 ms 3060 KB
1_02.txt WA 17 ms 3064 KB
1_03.txt WA 17 ms 3064 KB
1_04.txt AC 355 ms 25704 KB
1_05.txt WA 349 ms 28964 KB
1_06.txt WA 338 ms 24968 KB
1_07.txt WA 360 ms 28072 KB
1_08.txt WA 220 ms 18552 KB
1_09.txt WA 234 ms 19572 KB
1_10.txt WA 76 ms 8396 KB
1_11.txt WA 144 ms 12316 KB
1_12.txt WA 28 ms 4972 KB
1_13.txt WA 301 ms 23900 KB
1_14.txt WA 167 ms 13988 KB
1_15.txt WA 294 ms 22364 KB
1_16.txt WA 23 ms 4212 KB
1_17.txt WA 352 ms 27832 KB
1_18.txt WA 325 ms 25136 KB
1_19.txt WA 356 ms 27188 KB
1_20.txt WA 334 ms 25792 KB
1_21.txt WA 273 ms 22112 KB
1_22.txt WA 351 ms 27812 KB
1_23.txt WA 102 ms 10056 KB