CSES - Datatähti 2026 alku

Submission details
Task:	Hypyt
Sender:	Nyno
Submission time:	2025-10-31 08:11:49 +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	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#2	ACCEPTED	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	WRONG ANSWER	0.01 s	2, 5	details
#7	WRONG ANSWER	0.01 s	2, 5	details
#8	WRONG ANSWER	0.01 s	2, 5	details
#9	WRONG ANSWER	0.08 s	3, 4, 5	details
#10	WRONG ANSWER	0.08 s	3, 4, 5	details
#11	WRONG ANSWER	0.08 s	3, 4, 5	details
#12	WRONG ANSWER	0.08 s	4, 5	details
#13	WRONG ANSWER	0.08 s	4, 5	details
#14	WRONG ANSWER	0.09 s	4, 5	details
#15	WRONG ANSWER	0.09 s	5	details
#16	WRONG ANSWER	0.10 s	5	details
#17	WRONG ANSWER	0.09 s	5	details
#18	WRONG ANSWER	0.09 s	5	details
#19	WRONG ANSWER	0.08 s	5	details
#20	WRONG ANSWER	0.09 s	5	details
#21	WRONG ANSWER	0.08 s	5	details
#22	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#23	WRONG ANSWER	0.00 s	1, 2, 3, 4, 5	details
#24	WRONG ANSWER	0.09 s	5	details
#25	WRONG ANSWER	0.08 s	5	details
#26	ACCEPTED	0.09 s	5	details
#27	ACCEPTED	0.08 s	5	details

Compiler report

input/code.c: In function 'main':
input/code.c:48:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     scanf("%d %d %d", &n, &m, &q);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.c:49:33: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |     for (int i = 0; i < n; i++) scanf("%s", grid[i]);
      |                                 ^~~~~~~~~~~~~~~~~~~~
input/code.c:64:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         scanf("%d %d %d %d",&y1,&x1,&y2,&x2);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Code

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

#define MAXN 250
#define MAXM 250

char grid[MAXN][MAXM+1];
int row_id[MAXN][MAXM], col_id[MAXN][MAXM];
int n, m, q;

int row_comp[MAXN][MAXM], col_comp[MAXN][MAXM];
int rowcnt = 0, colcnt = 0;

void make_row_ids() {
    for (int i = 0; i < n; i++) {
        int id = -1;
        for (int j = 0; j < m; j++) {
            if (grid[i][j] == '.') {
                if (j == 0 || grid[i][j-1] == '*')
                    id = rowcnt++;
                row_id[i][j] = id;
            }
        }
    }
}

void make_col_ids() {
    for (int j = 0; j < m; j++) {
        int id = -1;
        for (int i = 0; i < n; i++) {
            if (grid[i][j] == '.') {
                if (i == 0 || grid[i-1][j] == '*')
                    id = colcnt++;
                col_id[i][j] = id;
            }
        }
    }
}

int parent[MAXN*MAXM*2];
int find(int x){ return parent[x]==x ? x : (parent[x]=find(parent[x])); }
void unite(int a,int b){
    a=find(a); b=find(b);
    if(a!=b) parent[a]=b;
}

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

    make_row_ids();
    make_col_ids();

    int total = rowcnt + colcnt;
    for (int i = 0; i < total; i++) parent[i] = i;

    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            if (grid[i][j] == '.')
                unite(row_id[i][j], rowcnt + col_id[i][j]);

    while (q--) {
        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;
        }

        int r1=row_id[y1][x1], c1=col_id[y1][x1]+rowcnt;
        int r2=row_id[y2][x2], c2=col_id[y2][x2]+rowcnt;

        int s1=find(r1), s2=find(c1), s3=find(r2), s4=find(c2);
        if (s1==s3 || s1==s4 || s2==s3 || s2==s4) {
            if (y1==y2 && x1==x2) printf("0\n");
            else if (r1==r2 || c1==c2) printf("1\n");
            else printf("2\n");
        } else printf("-1\n");
    }

    return 0;
}

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
`-1 0 -1 -1 -1` view save

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

Test 2

Group: 1, 2, 3, 4, 5

Verdict: ACCEPTED

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

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

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

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

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

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

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

Test 5

Group: 1, 2, 3, 4, 5

Verdict: WRONG ANSWER

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

correct output
`7` view save

user output
`-1` view save

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

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
`2 2 2 2 2 ...` view save

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

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 -1 ...` 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 -1 -1 -1 -1 ...` 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
`2 2 2 2 2 ...` view save

Feedback: Incorrect character on line 32 col 1: expected "3", got "2"

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

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

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
`2 2 2 2 2 ...` view save

Feedback: Incorrect character on line 20 col 1: expected "1", got "2"

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

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

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 -1 -1 -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 2 2 2 2 ...` 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
`-1 -1 -1 -1 -1 ...` view save

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

Test 18

Group: 5

Verdict: WRONG ANSWER

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

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

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

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

Test 19

Group: 5

Verdict: WRONG ANSWER

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

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

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

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

Test 20

Group: 5

Verdict: WRONG ANSWER

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

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

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

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

Test 21

Group: 5

Verdict: WRONG ANSWER

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

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

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

Feedback: Incorrect character on line 1 col 1: expected "498", got "2"

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 -1 -1 0 0 ...` view save

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

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

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

Test 24

Group: 5

Verdict: WRONG ANSWER

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

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

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

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

Test 25

Group: 5

Verdict: WRONG ANSWER

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

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

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

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

Test 26

Group: 5

Verdict: ACCEPTED

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

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

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

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

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)