CSES - Datatähti 2026 alku

Submission details
Task:	Hypyt
Sender:	Nyno
Submission time:	2025-11-07 14:09:56 +0200
Language:	C
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	ACCEPTED	0.00 s	1, 2, 3, 4, 5	details
#2	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#3	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#4	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#5	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#6	TIME LIMIT EXCEEDED	--	2, 5	details
#7	TIME LIMIT EXCEEDED	--	2, 5	details
#8	TIME LIMIT EXCEEDED	--	2, 5	details
#9	RUNTIME ERROR	0.00 s	3, 4, 5	details
#10	RUNTIME ERROR	0.00 s	3, 4, 5	details
#11	RUNTIME ERROR	0.00 s	3, 4, 5	details
#12	RUNTIME ERROR	0.00 s	4, 5	details
#13	RUNTIME ERROR	0.00 s	4, 5	details
#14	RUNTIME ERROR	0.00 s	4, 5	details
#15	RUNTIME ERROR	0.00 s	5	details
#16	RUNTIME ERROR	0.00 s	5	details
#17	RUNTIME ERROR	0.00 s	5	details
#18	RUNTIME ERROR	0.00 s	5	details
#19	RUNTIME ERROR	0.00 s	5	details
#20	RUNTIME ERROR	0.00 s	5	details
#21	RUNTIME ERROR	0.00 s	5	details
#22	ACCEPTED	0.00 s	1, 2, 3, 4, 5	details
#23	ACCEPTED	0.00 s	1, 2, 3, 4, 5	details
#24	RUNTIME ERROR	0.00 s	5	details
#25	RUNTIME ERROR	0.00 s	5	details
#26	RUNTIME ERROR	0.00 s	5	details
#27	RUNTIME ERROR	0.00 s	5	details

Compiler report

input/code.c: In function 'main':
input/code.c:57:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     scanf("%d %d %d", &n, &m, &q);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.c:59:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         scanf("%s", grid[i]);
      |         ^~~~~~~~~~~~~~~~~~~~
input/code.c:83:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         scanf("%d %d %d %d", &y1, &x1, &y2, &x2);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Code

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAXN 10
#define MAXM 10
#define MAXQ 10

int n, m, q;
char grid[MAXN][MAXM];
int dist[MAXN][MAXM];


int rowSafe[MAXN][MAXM], rowCnt[MAXN];
int colSafe[MAXM][MAXN], colCnt[MAXM];

typedef struct {
    int y, x;
} Point;

Point queue[MAXN * MAXM];
int qh, qt;

void bfs(int sy, int sx, int ey, int ex) {
    memset(dist, -1, sizeof(dist));
    qh = qt = 0;
    dist[sy][sx] = 0;
    queue[qt++] = (Point){sy, sx};

    while(qh < qt) {
        Point p = queue[qh++];
        int y = p.y, x = p.x;

        if(y == ey && x == ex) break;


        for(int i = 0; i < rowCnt[y]; i++) {
            int nx = rowSafe[y][i];
            if(dist[y][nx] == -1) {
                dist[y][nx] = dist[y][x] + 1;
                queue[qt++] = (Point){y, nx};
            }
        }


        for(int i = 0; i < colCnt[x]; i++) {
            int ny = colSafe[x][i];
            if(dist[ny][x] == -1) {
                dist[ny][x] = dist[y][x] + 1;
                queue[qt++] = (Point){ny, x};
            }
        }
    }
}

int main() {
    scanf("%d %d %d", &n, &m, &q);
    for(int i = 0; i < n; i++) {
        scanf("%s", grid[i]);
    }


    for(int i = 0; i < n; i++) {
        rowCnt[i] = 0;
        for(int j = 0; j < m; j++) {
            if(grid[i][j] == '.') {
                rowSafe[i][rowCnt[i]++] = j;
            }
        }
    }
    for(int j = 0; j < m; j++) {
        colCnt[j] = 0;
        for(int i = 0; i < n; i++) {
            if(grid[i][j] == '.') {
                colSafe[j][colCnt[j]++] = i;
            }
        }
    }


    for(int k = 0; k < q; k++) {
        int y1,x1,y2,x2;
        scanf("%d %d %d %d", &y1, &x1, &y2, &x2);
        y1--; x1--; y2--; x2--;

        if(grid[y1][x1] != '.' || grid[y2][x2] != '.') {
            printf("-1\n");
            continue;
        }

        if(y1 == y2 && x1 == x2) {
            printf("0\n");
            continue;
        }
        bfs(y1, x1, y2, x2);
        printf("%d\n", dist[y2][x2]);
    }
    return 0;
}

Test details

Test 1 (public)

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

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

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

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

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
(empty)

Feedback: Output is shorter than expected

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
(empty)

Feedback: Output is shorter than expected

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
(empty)

Feedback: Output is shorter than expected

Test 5

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

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

correct output
`7` view save

user output
(empty)

Feedback: Output is shorter than expected

Test 6

Group: 2, 5

Verdict: TIME LIMIT EXCEEDED

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

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

user output
(empty)

Test 7

Group: 2, 5

Verdict: TIME LIMIT EXCEEDED

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

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

user output
(empty)

Test 8

Group: 2, 5

Verdict: TIME LIMIT EXCEEDED

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

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

user output
(empty)

Test 9

Group: 3, 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 10

Group: 3, 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 11

Group: 3, 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 12

Group: 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 13

Group: 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 14

Group: 4, 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 15

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 16

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 17

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 18

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 19

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 20

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 21

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 22

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

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

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

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

Test 23

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

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
`1 1 1 1 1 ...` view save

Test 24

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 25

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 26

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 27

Group: 5

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Datatähti 2026 alku

Hypyt

Compiler report

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 (Nyno)