CSES - Aalto Competitive Programming 2025 - wk6 - Wed

Submission details
Task:	Online feud
Sender:	aalto25f_005
Submission time:	2025-10-08 18:58:28 +0300
Language:	Python3 (PyPy3)
Status:	READY
Result:	ACCEPTED

Test results
test	verdict	time
#1	ACCEPTED	0.05 s	details
#2	ACCEPTED	0.05 s	details
#3	ACCEPTED	0.05 s	details
#4	ACCEPTED	0.05 s	details
#5	ACCEPTED	0.05 s	details
#6	ACCEPTED	0.05 s	details
#7	ACCEPTED	0.05 s	details
#8	ACCEPTED	0.05 s	details
#9	ACCEPTED	0.05 s	details
#10	ACCEPTED	0.05 s	details
#11	ACCEPTED	0.05 s	details
#12	ACCEPTED	0.05 s	details
#13	ACCEPTED	0.05 s	details
#14	ACCEPTED	0.05 s	details
#15	ACCEPTED	0.05 s	details
#16	ACCEPTED	0.05 s	details
#17	ACCEPTED	0.05 s	details
#18	ACCEPTED	0.05 s	details
#19	ACCEPTED	0.05 s	details
#20	ACCEPTED	0.05 s	details
#21	ACCEPTED	0.05 s	details
#22	ACCEPTED	0.05 s	details
#23	ACCEPTED	0.05 s	details
#24	ACCEPTED	0.05 s	details
#25	ACCEPTED	0.05 s	details
#26	ACCEPTED	0.05 s	details
#27	ACCEPTED	0.05 s	details
#28	ACCEPTED	0.05 s	details
#29	ACCEPTED	0.05 s	details
#30	ACCEPTED	0.05 s	details
#31	ACCEPTED	0.05 s	details
#32	ACCEPTED	0.05 s	details
#33	ACCEPTED	0.05 s	details
#34	ACCEPTED	0.05 s	details
#35	ACCEPTED	0.05 s	details
#36	ACCEPTED	0.05 s	details
#37	ACCEPTED	0.05 s	details
#38	ACCEPTED	0.05 s	details
#39	ACCEPTED	0.05 s	details
#40	ACCEPTED	0.05 s	details
#41	ACCEPTED	0.05 s	details
#42	ACCEPTED	0.05 s	details
#43	ACCEPTED	0.05 s	details
#44	ACCEPTED	0.05 s	details
#45	ACCEPTED	0.05 s	details
#46	ACCEPTED	0.05 s	details
#47	ACCEPTED	0.05 s	details
#48	ACCEPTED	0.05 s	details
#49	ACCEPTED	0.05 s	details
#50	ACCEPTED	0.05 s	details
#51	ACCEPTED	0.05 s	details
#52	ACCEPTED	0.09 s	details
#53	ACCEPTED	0.09 s	details
#54	ACCEPTED	0.09 s	details
#55	ACCEPTED	0.09 s	details
#56	ACCEPTED	0.09 s	details
#57	ACCEPTED	0.07 s	details
#58	ACCEPTED	0.09 s	details
#59	ACCEPTED	0.06 s	details
#60	ACCEPTED	0.10 s	details
#61	ACCEPTED	0.06 s	details
#62	ACCEPTED	0.36 s	details
#63	ACCEPTED	0.32 s	details
#64	ACCEPTED	0.40 s	details
#65	ACCEPTED	0.42 s	details
#66	ACCEPTED	0.49 s	details
#67	ACCEPTED	0.34 s	details
#68	ACCEPTED	0.43 s	details
#69	ACCEPTED	0.28 s	details
#70	ACCEPTED	0.51 s	details
#71	ACCEPTED	0.25 s	details

Code

n, m = map(int, input().split())
adj = [[] for _ in range(n + 1)]

for _ in range(m):
    a, b, c = map(int, input().split())
    w = 0 if c == 1 else 1
    adj[a].append((b, w))
    adj[b].append((a, w))

lab = [-1] * (n + 1)

from collections import deque

def bfs(start):
    lab[start] = 0
    dq = deque([start])
    while dq:
        u = dq.popleft()
        for v, w in adj[u]:
            expect = lab[u] ^ w
            if lab[v] == -1:
                lab[v] = expect
                dq.append(v)
            elif lab[v] != expect:
                return False
    return True

ok = True
for u in range(1, n + 1):
    if lab[u] == -1:
        if not bfs(u):
            ok = False
            break

print("Yes" if ok else "No")

Test details

Test 1

Verdict: ACCEPTED

input
`2 4 2 1 1 1 2 -1 1 2 1 1 2 -1` view save

correct output
`No` view save

user output
`No` view save

Test 2

Verdict: ACCEPTED

input
`2 4 1 2 -1 2 1 -1 1 2 -1 1 2 -1` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 3

Verdict: ACCEPTED

input
`3 2 2 3 1 3 2 1` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 4

Verdict: ACCEPTED

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

correct output
`Yes` view save

user output
`Yes` view save

Test 5

Verdict: ACCEPTED

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

correct output
`No` view save

user output
`No` view save

Test 6

Verdict: ACCEPTED

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

correct output
`Yes` view save

user output
`Yes` view save

Test 7

Verdict: ACCEPTED

input
`4 8 3 4 1 1 3 -1 2 3 -1 1 2 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 8

Verdict: ACCEPTED

input
`4 8 3 2 -1 3 1 -1 1 2 1 1 2 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 9

Verdict: ACCEPTED

input
`4 7 3 4 1 3 2 -1 2 1 1 1 4 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 10

Verdict: ACCEPTED

input
`4 8 3 1 -1 1 2 1 4 3 1 1 2 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 11

Verdict: ACCEPTED

input
`4 7 1 3 -1 4 2 1 3 4 1 4 2 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 12

Verdict: ACCEPTED

input
`5 7 4 5 -1 5 3 -1 3 4 -1 2 3 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 13

Verdict: ACCEPTED

input
`5 6 4 5 1 1 2 -1 1 2 1 2 1 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 14

Verdict: ACCEPTED

input
`5 6 4 5 1 1 3 1 4 5 1 2 4 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 15

Verdict: ACCEPTED

input
`5 7 4 5 1 1 3 1 1 4 -1 1 4 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 16

Verdict: ACCEPTED

input
`5 10 3 1 -1 5 4 -1 4 3 1 1 5 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 17

Verdict: ACCEPTED

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

correct output
`Yes` view save

user output
`Yes` view save

Test 18

Verdict: ACCEPTED

input
`5 10 1 5 -1 1 3 -1 3 4 -1 3 4 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 19

Verdict: ACCEPTED

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

correct output
`Yes` view save

user output
`Yes` view save

Test 20

Verdict: ACCEPTED

input
`5 9 5 4 -1 1 5 -1 3 5 -1 1 3 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 21

Verdict: ACCEPTED

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

correct output
`Yes` view save

user output
`Yes` view save

Test 22

Verdict: ACCEPTED

input
`10 14 8 9 -1 9 6 -1 5 7 -1 4 5 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 23

Verdict: ACCEPTED

input
`10 12 8 10 1 2 4 -1 2 3 1 4 2 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 24

Verdict: ACCEPTED

input
`10 12 9 10 1 2 5 1 8 10 1 5 8 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 25

Verdict: ACCEPTED

input
`10 14 8 10 1 3 7 1 1 8 -1 1 8 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 26

Verdict: ACCEPTED

input
`10 20 6 2 -1 9 8 -1 7 6 1 2 10 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 27

Verdict: ACCEPTED

input
`10 9 9 10 1 9 10 1 9 7 -1 3 10 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 28

Verdict: ACCEPTED

input
`10 19 4 3 -1 2 10 -1 1 6 -1 5 6 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 29

Verdict: ACCEPTED

input
`10 7 10 4 -1 8 7 -1 4 8 -1 2 8 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 30

Verdict: ACCEPTED

input
`10 19 10 8 -1 1 10 -1 5 10 -1 2 6 1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 31

Verdict: ACCEPTED

input
`10 6 3 6 -1 1 6 -1 6 7 1 1 7 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 32

Verdict: ACCEPTED

input
`100 133 72 85 -1 86 55 -1 43 63 -1 39 44 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 33

Verdict: ACCEPTED

input
`100 113 73 94 1 13 31 -1 15 24 1 40 19 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 34

Verdict: ACCEPTED

input
`100 116 1 2 1 1 34 -1 71 1 -1 1 50 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 35

Verdict: ACCEPTED

input
`100 133 74 88 1 31 66 1 9 72 -1 4 73 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 36

Verdict: ACCEPTED

input
`100 196 55 18 -1 86 72 -1 70 60 1 15 98 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 37

Verdict: ACCEPTED

input
`100 84 92 100 1 89 96 1 92 67 -1 26 100 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 38

Verdict: ACCEPTED

input
`100 184 34 21 -1 7 5 1 11 99 -1 10 53 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 39

Verdict: ACCEPTED

input
`100 62 100 34 -1 85 76 -1 39 79 -1 21 78 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 40

Verdict: ACCEPTED

input
`100 182 98 84 -1 98 99 1 99 100 1 51 100 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 41

Verdict: ACCEPTED

input
`100 52 25 51 -1 8 51 -1 57 68 1 5 70 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 42

Verdict: ACCEPTED

input
`200 265 144 169 -1 172 109 -1 85 125 -1 77 88 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 43

Verdict: ACCEPTED

input
`200 226 145 187 1 26 61 -1 30 48 1 80 38 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 44

Verdict: ACCEPTED

input
`200 231 4 5 1 3 68 -1 142 2 -1 2 100 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 45

Verdict: ACCEPTED

input
`200 266 149 176 1 62 133 1 18 144 -1 8 147 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 46

Verdict: ACCEPTED

input
`200 391 110 35 -1 172 143 -1 140 120 1 29 196 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 47

Verdict: ACCEPTED

input
`200 167 184 199 1 177 192 1 184 134 -1 52 200 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 48

Verdict: ACCEPTED

input
`200 368 67 42 -1 13 9 1 22 198 -1 20 106 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 49

Verdict: ACCEPTED

input
`200 123 200 68 -1 169 152 -1 78 159 -1 42 156 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 50

Verdict: ACCEPTED

input
`200 363 196 168 -1 196 197 1 198 199 1 101 200 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 51

Verdict: ACCEPTED

input
`200 104 50 101 -1 15 102 -1 114 136 1 9 140 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 52

Verdict: ACCEPTED

input
`1000 1324 716 845 -1 858 545 -1 424 624 -1 385 438 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 53

Verdict: ACCEPTED

input
`1000 1126 721 933 1 129 303 -1 147 237 1 397 187 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 54

Verdict: ACCEPTED

input
`1000 1154 23 24 1 11 338 -1 707 6 -1 8 499 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 55

Verdict: ACCEPTED

input
`1000 1327 744 875 1 310 667 1 89 720 -1 37 736 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 56

Verdict: ACCEPTED

input
`1000 1951 548 173 -1 856 715 -1 698 598 1 142 977 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 57

Verdict: ACCEPTED

input
`1000 833 917 994 1 882 955 1 917 667 -1 259 999 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 58

Verdict: ACCEPTED

input
`1000 1840 332 210 -1 65 42 1 108 986 -1 100 530 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 59

Verdict: ACCEPTED

input
`1000 615 996 342 -1 848 762 -1 391 799 -1 210 783 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 60

Verdict: ACCEPTED

input
`1000 1811 981 842 -1 982 983 1 992 996 1 506 996 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 61

Verdict: ACCEPTED

input
`1000 516 249 505 -1 72 508 -1 570 677 1 43 699 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 62

Verdict: ACCEPTED

input
`100000 132323 71521 84428 -1 85796 54490 -1 42367 62358 -1 38439 43760 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 63

Verdict: ACCEPTED

input
`100000 112554 72034 93258 1 12813 30234 -1 14676 23610 1 39659 18627 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 64

Verdict: ACCEPTED

input
`100000 115400 2456 2516 1 1090 33816 -1 70668 531 -1 777 49853 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 65

Verdict: ACCEPTED

input
`100000 132621 74356 87456 1 30951 66681 1 8894 72001 -1 3645 73546 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 66

Verdict: ACCEPTED

input
`100000 195056 54725 17270 -1 85564 71483 -1 69774 59757 1 14147 97629 1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 67

Verdict: ACCEPTED

input
`100000 83300 91776 99331 1 88235 95433 1 91652 66692 -1 25844 99882 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 68

Verdict: ACCEPTED

input
`100000 183930 33199 20941 -1 6426 4170 1 10766 98505 -1 9948 52983 -1 ...` view save

correct output
`No` view save

user output
`No` view save

Test 69

Verdict: ACCEPTED

input
`100000 61447 99521 34194 -1 84772 76278 -1 39085 79902 -1 20937 78344 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 70

Verdict: ACCEPTED

input
`100000 181015 98043 84187 -1 98183 98204 1 99264 99561 1 50624 99598 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Test 71

Verdict: ACCEPTED

input
`100000 51557 24883 50564 -1 7133 50852 -1 57039 67698 1 4219 69908 -1 ...` view save

correct output
`Yes` view save

user output
`Yes` view save

Aalto Competitive Programming 2025 - wk6 - Wed

Online feud

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

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Test 71

Tasks

Submissions (aalto25f_005)