CSES - Datatähti 2025 alku

CSES - Datatähti 2025 alku - Results

Submission details
Task:	Robotti
Sender:	pyry0
Submission time:	2024-10-29 21:44:48 +0200
Language:	C
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	WRONG ANSWER	0
#2	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.00 s	1, 2	details
#2	ACCEPTED	0.00 s	1, 2	details
#3	ACCEPTED	0.00 s	1, 2	details
#4	ACCEPTED	0.00 s	1, 2	details
#5	ACCEPTED	0.00 s	1, 2	details
#6	ACCEPTED	0.00 s	1, 2	details
#7	WRONG ANSWER	0.00 s	1, 2	details
#8	ACCEPTED	0.00 s	1, 2	details
#9	ACCEPTED	0.00 s	1, 2	details
#10	ACCEPTED	0.00 s	1, 2	details
#11	ACCEPTED	0.00 s	1, 2	details
#12	WRONG ANSWER	0.00 s	2	details
#13	ACCEPTED	0.00 s	2	details
#14	WRONG ANSWER	0.00 s	2	details
#15	ACCEPTED	0.00 s	2	details
#16	ACCEPTED	0.00 s	2	details
#17	ACCEPTED	0.00 s	2	details
#18	WRONG ANSWER	0.00 s	2	details
#19	WRONG ANSWER	0.01 s	2	details
#20	ACCEPTED	0.00 s	2	details
#21	ACCEPTED	0.00 s	2	details
#22	ACCEPTED	0.00 s	2	details
#23	ACCEPTED	0.00 s	2	details
#24	ACCEPTED	0.00 s	2	details

Compiler report

input/code.c: In function 'main':
input/code.c:7:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     scanf("%d\n%s", &n, buf);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
input/code.c:12:9: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |     int r;
      |         ^

Code

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

int main(void) {
    int n;
    char *buf = malloc(300000);
    scanf("%d\n%s", &n, buf);
    int *l_poss = malloc(sizeof(int) * (n - 1));
    int *r_poss = malloc(sizeof(int) * (n - 1));
    int l_pos_i = 0;
    int r_pos_i = 0;
    int r;
    for (int i = 0; i < n; ++i) {
        if (buf[i] == '*') {
            l_poss[l_pos_i++] = i;
        } else if (buf[i] == 'R') {
            r = i;
            break;
        }
    }
    for (int i = r; i < n; ++i) {
        if (buf[i] == '*') {
            r_poss[r_pos_i++] = i;
        }
    }
    free(buf);
    int steps = 0;
    int coins = 0;
    int stupid = 0;
    while (l_pos_i != 0 || stupid != r_pos_i) {
        if (l_pos_i == 0) {
            steps += r_poss[r_pos_i - 1];
            coins += r_pos_i;
            break;
        } else if (r_pos_i == 0) {
            steps += r - l_poss[0];
            coins += l_pos_i;
            break;
        } else {
            int l_dist = r - l_poss[l_pos_i - 1];
            int r_dist = r_poss[stupid] - r;
            if (l_dist < r_dist) {
                r = l_poss[l_pos_i - 1];
                --l_pos_i;
                steps += l_dist;
                ++coins;
            } else if (r_dist < l_dist) {
                r = r_poss[stupid];
                ++stupid;
                steps += r_dist;
                ++coins;
            } else {
                break;
            }
        }
    }
    free(l_poss);
    free(r_poss);
    printf("%d %d", steps, coins);
    return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
`1 R` view save

correct output
`0 0` view save

user output
`0 0` view save

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
`10 ...R......` view save

correct output
`0 0` view save

user output
`0 0` view save

Test 3

Group: 1, 2

Verdict: ACCEPTED

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

correct output
`12 5` view save

user output
`12 5` view save

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
`10 *R****` view save

correct output
`0 0` view save

user output
`0 0` view save

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
`1000 R................................` view save

correct output
`947 9` view save

user output
`947 9` view save

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
`1000 .................................` view save

correct output
`886 9` view save

user output
`886 9` view save

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

input
`1000 .........................` view save

correct output
`1287 400` view save

user output
`-193751 799` view save

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
`1000 **********.***************...` view save

correct output
`0 0` view save

user output
`0 0` view save

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
`1000 ******************************...` view save

correct output
`0 0` view save

user output
`0 0` view save

Test 10

Group: 1, 2

Verdict: ACCEPTED

input
`1000 R*****************************...` view save

correct output
`999 999` view save

user output
`999 999` view save

Test 11

Group: 1, 2

Verdict: ACCEPTED

input
`1000 ******************************...` view save

correct output
`999 999` view save

user output
`999 999` view save

Test 12

Group: 2

Verdict: WRONG ANSWER

input
`10000 .......*...................*...` view save

correct output
`10971 999` view save

user output
`10978 1000` view save

Test 13

Group: 2

Verdict: ACCEPTED

input
`10000 ...........................` view save

correct output
`9999 999` view save

user output
`9999 999` view save

Test 14

Group: 2

Verdict: WRONG ANSWER

input
`10000 ...............*.....` view save

correct output
`18766 5000` view save

user output
`-818480 5656` view save

Test 15

Group: 2

Verdict: ACCEPTED

input
`10000 R*****************************...` view save

correct output
`9999 9999` view save

user output
`9999 9999` view save

Test 16

Group: 2

Verdict: ACCEPTED

input
`10000 ******************************...` view save

correct output
`9999 9999` view save

user output
`9999 9999` view save

Test 17

Group: 2

Verdict: ACCEPTED

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

correct output
`0 0` view save

user output
`0 0` view save

Test 18

Group: 2

Verdict: WRONG ANSWER

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

correct output
`299934 10000` view save

user output
`299979 10002` view save

Test 19

Group: 2

Verdict: WRONG ANSWER

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

correct output
`299998 100000` view save

user output
`-700077398 149959` view save

Test 20

Group: 2

Verdict: ACCEPTED

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

correct output
`0 0` view save

user output
`0 0` view save

Test 21

Group: 2

Verdict: ACCEPTED

input
`200000 R................................` view save

correct output
`133765 3` view save

user output
`133765 3` view save

Test 22

Group: 2

Verdict: ACCEPTED

input
`200000 R................................` view save

correct output
`199982 5000` view save

user output
`199982 5000` view save

Test 23

Group: 2

Verdict: ACCEPTED

input
`200000 R*****************************...` view save

correct output
`199999 199999` view save

user output
`199999 199999` view save

Test 24

Group: 2

Verdict: ACCEPTED

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

correct output
`199999 199999` view save

user output
`199999 199999` view save

Datatähti 2025 alku

Robotti

Compiler report

Code

Test details

Test 1

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

Tasks

Submissions (pyry0)