CSES - Datatähti 2026 alku

Submission details
Task:	Monikulmio
Sender:	OnlyBitUseless
Submission time:	2025-10-27 19:24:04 +0200
Language:	C
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	WRONG ANSWER	0

Test results
test	verdict
#1	WRONG ANSWER	details
#2	WRONG ANSWER	details
#3	WRONG ANSWER	details
#4	WRONG ANSWER	details
#5	WRONG ANSWER	details
#6	WRONG ANSWER	details
#7	WRONG ANSWER	details
#8	WRONG ANSWER	details
#9	WRONG ANSWER	details
#10	WRONG ANSWER	details

Compiler report

input/code.c: In function 'main':
input/code.c:5:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 |     scanf("%d %d %d", &n, &m, &k);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.c:27:13: warning: 'yl' may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |         int dy = y - yl;
      |             ^~
input/code.c:63:21: warning: 'y0' may be used uninitialized in this function [-Wmaybe-uninitialized]
   63 |         if (x0 == x && y0 == y) break;
      |             ~~~~~~~~^~~~~~~~~~

Code

#include <stdio.h>

int main(){
    int n, m, k;
    scanf("%d %d %d", &n, &m, &k);

    int mx[n][m];

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            mx[i][j] = '.';
        }
    }
    
    int x0 = -1, y0, xl = -1, yl, x,y;

    while (scanf("%d %d", &x, &y) == 2){
        printf("[%d, %d] -> [%d, %d]\n", xl, yl, x, y);

        if (x0 < 0) {
            x0 = x;
            y0 = y;
        }
        
        mx[x-1][y-1] = '*';

        int dy = y - yl;
        int dx = x - xl;

        while (!(xl == x) || !(yl == y)) {
            if (xl < 0 || yl < 0) break;

            xl += xl > x ? -1 : xl < x ? 1 : 0;
            yl += yl > y ? -1 : yl < y ? 1 : 0;
            
            if (xl == x && yl == y) break;

            if (dx == 0) {
                mx[xl - 1][yl - 1] = '=';
                continue;
            }
            if (dy/dx > 0) {
                mx[xl - 1][yl - 1] = '\\';
            } else if (dy/dx < 0) {
                mx[xl - 1][yl - 1] = '/';
            } else {
                mx[xl - 1][yl - 1] = '|';
            } 
        }

        xl = x;
        yl = y;
    }

    int dy = y0 - y;
    int dx = x0 - x;

    while (!(x0 == x) || !(y0 == y)) {

        x += x > x0 ? -1 : x < x0 ? 1 : 0;
        y += y > y0 ? -1 : y < y0 ? 1 : 0;
        
        if (x0 == x && y0 == y) break;

        if (dx == 0) {
            mx[x - 1][y -1] = '=';
            continue;
        }
        if (dy/dx > 0) {
            mx[x - 1][y - 1] = '\\';
        } else if (dy/dx < 0) {
            mx[x - 1][y - 1] = '/';
        } else {
            mx[x - 1][y - 1] = '|';
        } 
    }
    
    int in;
    
    for (int i = 0; i < n; i++) {
        in = -1;
        for (int j = 0; j < m; j++) {
            if (!(in < 0) && mx[i][j] == '.') {
                printf("#");
                continue;
            }
            printf("%c", mx[i][j]);
            if (mx[i][j] == '/' || mx[i][j] == '|' || mx[i][j] == '\\') in = in < 0 ? 0 : -1;
        
        }
        printf("\n");
    }
}

Test details

Test 1 (public)

Verdict: WRONG ANSWER

input
`8 9 5 5 2 2 5 5 8 7 8 ...` view save

correct output
`......... ........ .../#\... ../###\.. .#####*. ...` view save

user output
`[-1, -4696] -> [5, 2] [5, 2] -> [2, 5] [2, 5] -> [5, 8] [5, 8] -> [7, 8] [7, 8] -> [7, 2] ...` view save

Feedback: Incorrect length on line 1: expected 9, got 4

Test 2 (public)

Verdict: WRONG ANSWER

input
`20 40 4 5 10 5 30 15 30 15 10` view save

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

user output
`[-1, -4696] -> [5, 10] [5, 10] -> [5, 30] [5, 30] -> [15, 30] [15, 30] -> [15, 10] .................................` view save

Feedback: Incorrect length on line 1: expected 40, got 4

Test 3 (public)

Verdict: WRONG ANSWER

input
`20 40 29 8 7 13 2 14 2 9 7 ...` view save

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

user output
`[-1, -4696] -> [8, 7] [8, 7] -> [13, 2] [13, 2] -> [14, 2] [14, 2] -> [9, 7] [9, 7] -> [17, 7] ...` view save

Feedback: Incorrect length on line 1: expected 40, got 4

Test 4 (public)

Verdict: WRONG ANSWER

input
`20 40 14 5 12 5 25 8 28 13 28 ...` view save

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

user output
`[-1, -4696] -> [5, 12] [5, 12] -> [5, 25] [5, 25] -> [8, 28] [8, 28] -> [13, 28] [13, 28] -> [16, 25] ...` view save

Feedback: Incorrect length on line 1: expected 40, got 4

Test 5 (public)

Verdict: WRONG ANSWER

input
`20 40 12 3 20 7 16 7 9 11 13 ...` view save

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

user output
`[-1, -4696] -> [3, 20] [3, 20] -> [7, 16] [7, 16] -> [7, 9] [7, 9] -> [11, 13] [11, 13] -> [15, 9] ...` view save

Feedback: Incorrect length on line 1: expected 40, got 4

Test 6 (public)

Verdict: WRONG ANSWER

input
`9 35 33 2 3 2 8 4 8 4 5 ...` view save

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

user output
`[-1, -4696] -> [2, 3] [2, 3] -> [2, 8] [2, 8] -> [4, 8] [4, 8] -> [4, 5] [4, 5] -> [6, 5] ...` view save

Feedback: Incorrect length on line 1: expected 35, got 4

Test 7 (public)

Verdict: WRONG ANSWER

input
`30 100 69 6 10 6 14 7 14 7 18 ...` view save

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

user output
`[-1, -4696] -> [6, 10] [6, 10] -> [6, 14] [6, 14] -> [7, 14] [7, 14] -> [7, 18] [7, 18] -> [8, 18] ...` view save

Feedback: Incorrect length on line 1: expected 100, got 4

Test 8 (public)

Verdict: WRONG ANSWER

input
`40 60 192 11 3 11 5 10 6 11 7 ...` view save

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

user output
`[-1, -4696] -> [11, 3] [11, 3] -> [11, 5] [11, 5] -> [10, 6] [10, 6] -> [11, 7] [11, 7] -> [11, 9] ...` view save

Feedback: Incorrect length on line 1: expected 60, got 4

Test 9 (public)

Verdict: WRONG ANSWER

input
`50 100 142 1 1 1 7 1 11 1 14 ...` view save

correct output
`==========...................` view save

user output
`[-1, -4696] -> [1, 1] [1, 1] -> [1, 7] [1, 7] -> [1, 11] [1, 11] -> [1, 14] [1, 14] -> [2, 14] ...` view save

Feedback: Incorrect length on line 1: expected 100, got 4

Test 10 (public)

Verdict: WRONG ANSWER

input
`100 100 1000 10 1 4 7 1 4 1 9 ...` view save

correct output
`...====........................` view save

user output
`[-1, -4696] -> [10, 1] [10, 1] -> [4, 7] [4, 7] -> [1, 4] [1, 4] -> [1, 9] [1, 9] -> [2, 8] ...` view save

Feedback: Incorrect length on line 1: expected 100, got 4

Datatähti 2026 alku

Monikulmio

Compiler report

Code

Test details

Test 1 (public)

Test 2 (public)

Test 3 (public)

Test 4 (public)

Test 5 (public)

Test 6 (public)

Test 7 (public)

Test 8 (public)

Test 9 (public)

Test 10 (public)

Tasks

Submissions (OnlyBitUseless)