CSES - Aalto Competitive Programming 2024 - wk2 - Mon

CSES - Aalto Competitive Programming 2024 - wk2 - Mon - Results

Submission details
Task:	Building Teams
Sender:	aarol
Submission time:	2024-09-09 17:32:44 +0300
Language:	CPython3
Status:	READY
Result:	WRONG ANSWER

Test results
test	verdict	time
#1	WRONG ANSWER	0.02 s	details
#2	WRONG ANSWER	0.02 s	details
#3	WRONG ANSWER	0.02 s	details
#4	WRONG ANSWER	0.02 s	details
#5	ACCEPTED	0.02 s	details
#6	RUNTIME ERROR	0.76 s	details
#7	RUNTIME ERROR	0.77 s	details
#8	RUNTIME ERROR	0.76 s	details
#9	RUNTIME ERROR	0.77 s	details
#10	ACCEPTED	0.76 s	details
#11	ACCEPTED	0.02 s	details
#12	ACCEPTED	0.02 s	details

Code

line = input()

parts = line.split(" ")
pupils, friendships = int(parts[0]), int(parts[1])

adj: dict[int, list[int]] = {}
for i in range(1, pupils + 1):
    adj[i] = []

for _ in range(friendships):
    parts = input().split(" ")
    a, b = int(parts[0]), int(parts[1])

    adj[a].append(b)
    adj[b].append(a)


res: list[str] = []
for i in range(pupils+1):
    res.append("0")

#team = 2, !team = 1
def rec(p: int, team: str):
    
    if res[p] == "1" and team == "2":
        print("IMPOSSIBLE")
        exit(0)

    if res[p] == "2" and team == "1":
        print("IMPOSSIBLE")
        exit(0)

    if res[p] != "0":
        return
    
    res[p] = team
    
    for friend in adj[p]:
        rec(friend, "1" if team == "2" else "2")

for p in range(1, pupils + 1):
    rec(p, "1")

print(" ".join(res[1:]))

Test details

Test 1

Verdict: WRONG ANSWER

input
`10 20 3 4 8 10 3 7 1 8 ...` view save

correct output
`1 1 1 2 2 1 2 2 2 1` view save

user output
`IMPOSSIBLE` view save

Test 2

Verdict: WRONG ANSWER

input
`10 20 1 3 8 10 2 4 6 8 ...` view save

correct output
`1 1 2 2 1 1 1 2 1 1` view save

user output
`IMPOSSIBLE` view save

Test 3

Verdict: WRONG ANSWER

input
`10 20 7 10 3 10 9 10 2 10 ...` view save

correct output
`1 2 2 1 1 1 2 1 2 1` view save

user output
`IMPOSSIBLE` view save

Test 4

Verdict: WRONG ANSWER

input
`10 20 2 4 2 10 7 10 4 6 ...` view save

correct output
`1 2 1 1 2 2 2 1 2 1` view save

user output
`IMPOSSIBLE` view save

Test 5

Verdict: ACCEPTED

input
`10 20 3 5 8 10 9 10 1 8 ...` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 6

Verdict: RUNTIME ERROR

input
`100000 200000 47355 96505 90709 92058 735 80715 91802 94265 ...` view save

correct output
`1 2 2 1 2 1 1 1 2 2 1 2 1 1 1 ...` view save

user output
(empty)

Error:

Traceback (most recent call last):
  File "/box/input/code.py", line 42, in <module>
    rec(p, "1")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  [Previous line repeated 995 more times]
  File "/box/input/code.py", line 25, in rec
    if res[p] == "1" and team == "2":
RecursionError: maximum recursion depth exceeded in comparison

Test 7

Verdict: RUNTIME ERROR

input
`100000 200000 59991 95794 95150 96051 78453 94730 90411 95523 ...` view save

correct output
`1 1 1 2 2 1 1 2 1 2 1 2 2 2 1 ...` view save

user output
(empty)

Error:

Traceback (most recent call last):
  File "/box/input/code.py", line 42, in <module>
    rec(p, "1")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  [Previous line repeated 995 more times]
  File "/box/input/code.py", line 25, in rec
    if res[p] == "1" and team == "2":
RecursionError: maximum recursion depth exceeded in comparison

Test 8

Verdict: RUNTIME ERROR

input
`100000 200000 89827 96402 65137 86792 80965 94708 19479 48078 ...` view save

correct output
`1 2 1 1 2 1 2 2 2 1 2 1 1 2 1 ...` view save

user output
(empty)

Error:

Traceback (most recent call last):
  File "/box/input/code.py", line 42, in <module>
    rec(p, "1")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  [Previous line repeated 995 more times]
  File "/box/input/code.py", line 25, in rec
    if res[p] == "1" and team == "2":
RecursionError: maximum recursion depth exceeded in comparison

Test 9

Verdict: RUNTIME ERROR

input
`100000 200000 72952 83723 66197 70052 2949 52160 55753 95651 ...` view save

correct output
`1 1 2 2 2 1 1 2 2 2 2 2 1 2 1 ...` view save

user output
(empty)

Error:

Traceback (most recent call last):
  File "/box/input/code.py", line 42, in <module>
    rec(p, "1")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  File "/box/input/code.py", line 39, in rec
    rec(friend, "1" if team == "2" else "2")
  [Previous line repeated 995 more times]
  File "/box/input/code.py", line 25, in rec
    if res[p] == "1" and team == "2":
RecursionError: maximum recursion depth exceeded in comparison

Test 10

Verdict: ACCEPTED

input
`100000 200000 38942 96755 70049 82663 7746 72732 87819 99029 ...` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 11

Verdict: ACCEPTED

input
`5 4 1 2 3 4 4 5 5 3` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 12

Verdict: ACCEPTED

input
`4 5 1 2 1 4 2 3 2 4 ...` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Aalto Competitive Programming 2024 - wk2 - Mon

Building Teams

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Tasks

Submissions (aarol)