CSES - Datatähti 2026 alku

Submission details
Task:	Hypyt
Sender:	Emil
Submission time:	2025-11-06 22:21:27 +0200
Language:	Python3 (PyPy3)
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	WRONG ANSWER	0
#2	WRONG ANSWER	0
#3	WRONG ANSWER	0
#4	WRONG ANSWER	0
#5	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#2	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#3	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#4	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#5	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#6	WRONG ANSWER	0.23 s	2, 5	details
#7	WRONG ANSWER	0.18 s	2, 5	details
#8	WRONG ANSWER	0.14 s	2, 5	details
#9	WRONG ANSWER	0.29 s	3, 4, 5	details
#10	WRONG ANSWER	0.30 s	3, 4, 5	details
#11	WRONG ANSWER	0.29 s	3, 4, 5	details
#12	WRONG ANSWER	0.30 s	4, 5	details
#13	WRONG ANSWER	0.30 s	4, 5	details
#14	WRONG ANSWER	0.30 s	4, 5	details
#15	WRONG ANSWER	0.50 s	5	details
#16	WRONG ANSWER	0.46 s	5	details
#17	WRONG ANSWER	0.40 s	5	details
#18	WRONG ANSWER	0.38 s	5	details
#19	WRONG ANSWER	0.36 s	5	details
#20	WRONG ANSWER	0.37 s	5	details
#21	WRONG ANSWER	0.30 s	5	details
#22	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#23	WRONG ANSWER	0.05 s	1, 2, 3, 4, 5	details
#24	WRONG ANSWER	0.29 s	5	details
#25	WRONG ANSWER	0.27 s	5	details
#26	WRONG ANSWER	0.54 s	5	details
#27	ACCEPTED	0.28 s	5	details

Code

# Ratkaisu tehtävään "turvalliset ruudut ja hypyt"
# Mallinnus rivit + sarakkeet -graafina
# Lopussa korjattu hyppyjen laskenta: d//2 (+1 jos d>0)

import sys
from collections import deque

def bfs(start, adj, N):
    INF = 10**9
    dist = [INF] * N
    dq = deque([start])
    dist[start] = 0
    while dq:
        u = dq.popleft()
        for v in adj[u]:
            if dist[v] == INF:
                dist[v] = dist[u] + 1
                dq.append(v)
    return dist

def main():
    data = sys.stdin.read().split()
    it = iter(data)
    n = int(next(it)); m = int(next(it)); q = int(next(it))
    grid = []
    for _ in range(n):
        grid.append(list(next(it).strip()))

    N = n + m  # rivit 0..n-1, sarakkeet n..n+m-1
    adj = [[] for _ in range(N)]

    # Lisää reunat rivin r ja sarakkeen n+c välille jos ruutu on turvallinen
    for r in range(n):
        for c in range(m):
            if grid[r][c] == '.':
                u = r
                v = n + c
                adj[u].append(v)
                adj[v].append(u)

    # Esilasketaan BFS jokaisesta solmusta
    all_dist = [None] * N
    for s in range(N):
        all_dist[s] = bfs(s, adj, N)

    INF = 10**9
    out_lines = []
    for _ in range(q):
        y1 = int(next(it)); x1 = int(next(it))
        y2 = int(next(it)); x2 = int(next(it))
        r1 = y1 - 1
        c1 = x1 - 1
        r2 = y2 - 1
        c2 = x2 - 1

        start_nodes = (r1, n + c1)
        end_nodes = (r2, n + c2)

        ans = INF
        for s in start_nodes:
            for t in end_nodes:
                d = all_dist[s][t]
                if d < ans:
                    ans = d

        if ans >= INF:
            out_lines.append("-1")
        else:
            jumps = ans // 2
            if ans > 0:
                jumps += 1
            out_lines.append(str(jumps))

    sys.stdout.write("\n".join(out_lines))

if __name__ == "__main__":
    main()

Test details

Test 1 (public)

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`4 6 5 ..** ...* ****. ... ...` view save

correct output
`1 0 3 3 -1` view save

user output
`0 0 2 2 -1` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 2

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`10 10 10 .......... ......... ......... .....*.. ...` view save

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

user output
`0 1 0 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 3

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`10 10 10 .... ****.... .... ...*.. ...` view save

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

user output
`0 1 1 0 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 4

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`10 10 10 **..** ******** .******* .... ...` view save

correct output
`3 4 2 3 4 ...` view save

user output
`2 2 1 2 2 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 5

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`10 10 1 .**. ...* ******** ****.. ...` view save

correct output
`7` view save

user output
`4` view save

Feedback: Incorrect character on line 1 col 1: expected "7", got "4"

Test 6

Group: 2, 5

Verdict: WRONG ANSWER

input
`250 250 250 .........*****.....*.......` view save

correct output
`2 3 3 2 2 ...` view save

user output
`1 2 2 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 7

Group: 2, 5

Verdict: WRONG ANSWER

input
`250 250 250 ..................**...` view save

correct output
`2 2 2 2 3 ...` view save

user output
`1 1 1 1 2 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 8

Group: 2, 5

Verdict: WRONG ANSWER

input
`250 250 250 ....**.*..*......` view save

correct output
`2 3 3 3 3 ...` view save

user output
`1 2 2 2 2 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 9

Group: 3, 4, 5

Verdict: WRONG ANSWER

input
`40 40 200000 .....................*.....` view save

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

user output
`1 1 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 10

Group: 3, 4, 5

Verdict: WRONG ANSWER

input
`40 40 200000 ......***....*.....` view save

correct output
`2 1 3 2 2 ...` view save

user output
`1 0 2 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 11

Group: 3, 4, 5

Verdict: WRONG ANSWER

input
`40 40 200000 ....*...**..**...` view save

correct output
`3 3 3 3 3 ...` view save

user output
`2 2 2 2 2 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 12

Group: 4, 5

Verdict: WRONG ANSWER

input
`80 80 200000 .......*........*......` view save

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

user output
`1 1 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 13

Group: 4, 5

Verdict: WRONG ANSWER

input
`80 80 200000 .**......*.......*...` view save

correct output
`3 2 2 3 2 ...` view save

user output
`2 1 1 2 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 14

Group: 4, 5

Verdict: WRONG ANSWER

input
`80 80 200000 *****.**.....*...*...` view save

correct output
`2 3 1 2 2 ...` view save

user output
`1 2 0 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 15

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 ..........*...........**...` view save

correct output
`3 2 2 2 2 ...` view save

user output
`2 1 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 16

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 ...............*....**...` view save

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

user output
`1 1 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 17

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 ...***.*****..**...` view save

correct output
`3 3 2 2 2 ...` view save

user output
`2 2 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 18

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 *******.******.**....` view save

correct output
`3 3 3 3 3 ...` view save

user output
`2 2 2 2 2 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "3", got "2"

Test 19

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 .*****************************...` view save

correct output
`104 422 145 93 65 ...` view save

user output
`52 211 73 47 33 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "104", got "52"

Test 20

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 ..****************************...` view save

correct output
`57 155 38 65 98 ...` view save

user output
`29 78 19 33 49 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "57", got "29"

Test 21

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 .*****************************...` view save

correct output
`498 498 498 498 498 ...` view save

user output
`249 249 249 249 249 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "498", got "249"

Test 22

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`10 1 10 * * . * ...` view save

correct output
`0 1 1 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Feedback: Incorrect character on line 2 col 1: expected "1", got "0"

Test 23

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

input
`1 10 10 ........*. 1 7 1 10 1 4 1 7 1 5 1 1 ...` view save

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

user output
`0 0 0 0 0 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 24

Group: 5

Verdict: WRONG ANSWER

input
`250 1 200000 * . * . ...` view save

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

user output
`0 0 0 0 0 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 25

Group: 5

Verdict: WRONG ANSWER

input
`1 250 200000 ..............**...` view save

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

user output
`0 0 0 0 0 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "1", got "0"

Test 26

Group: 5

Verdict: WRONG ANSWER

input
`250 250 200000 .................................` view save

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

user output
`1 1 1 1 1 ...` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 27

Group: 5

Verdict: ACCEPTED

input
`250 250 200000 ******************************...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Datatähti 2026 alku

Hypyt

Code

Test details

Test 1 (public)

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Test 26

Test 27

Tasks

Submissions (Emil)