CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:-=SharpS=-
Submission time:2024-10-28 17:52:36 +0200
Language:C
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 2details
#2ACCEPTED0.00 s1, 2details
#30.01 s1, 2details
#4ACCEPTED0.00 s1, 2details
#50.00 s1, 2details
#60.00 s1, 2details
#70.00 s1, 2details
#8ACCEPTED0.00 s1, 2details
#9ACCEPTED0.00 s1, 2details
#100.00 s1, 2details
#110.00 s1, 2details
#120.01 s2details
#130.01 s2details
#140.02 s2details
#150.03 s2details
#160.03 s2details
#17ACCEPTED0.00 s2details
#180.47 s2details
#19--2details
#20ACCEPTED0.00 s2details
#210.00 s2details
#220.21 s2details
#23--2details
#24--2details

Compiler report

input/code.c: In function 'main':
input/code.c:63:11: warning: passing argument 1 of 'fgets' from incompatible pointer type [-Wincompatible-pointer-types]
   63 |     fgets(room_buffer, roomc+1, stdin);
      |           ^~~~~~~~~~~
      |           |
      |           char **
In file included from /usr/include/stdio.h:894,
                 from input/code.c:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:262:25: note: expected 'char * restrict' but argument is of type 'char **'
  262 | fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
      |        ~~~~~~~~~~~~~~~~~^~~
input/code.c:64:31: warning: passing argument 1 of 'get_ri' from incompatible pointer type [-Wincompatible-pointer-types]
   64 |     long robot_index = get_ri(room_buffer, roomc);
      |                               ^~~~~~~~~~~
      |                               |
      |                               char **
input/code.c:6:25: note: expected 'const char *' but argument is of type 'char **'
    6 |...

Code

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

long get_ri(const char* rooms, long max) {
    long pos = 0;
    for (long i = 0; i < max; i++) {
        if (rooms[i] == 'R') {
            pos = i;
            break;
        }
    }
    return pos;
}

void get_left_right(const char* rooms, long* leftP, long* rightP, long ri, long max) {
    *leftP = -1;
    *rightP = -1;

    for (long i = ri; i >= 0; i--) {
        if (rooms[i] == '*') {
            *leftP = i;
            break;
        }
    }

    for (long i = ri; i <= max; i++) {
        if (rooms[i] == '*') {
            *rightP = i;
            break;
        }
    }
}

void get_distance_lr(long leftP, long rightP, long* out_distanceL, long* out_distanceR, long ri) {
    if (leftP < 0) {
        *out_distanceL = -1;
    }
    else {
        *out_distanceL = ri - leftP;
    }
    
    if (rightP < 0) {
        *out_distanceR = -1;
    }
    else {
        *out_distanceR = rightP - ri;
    }
}

void move_to(char* rooms, long* ri, long to) {
    rooms[*ri] = '.';
    *ri = to;
}

int main() {
    char jou[100];
    fgets(jou, 100, stdin);

    long roomc = atol(jou);
    char* room_buffer[200000];
    fgets(room_buffer, roomc+1, stdin);
    long robot_index = get_ri(room_buffer, roomc);
    long coins_collected = 0;
    long distance = 0;

    long leftP;
    long rightP;
    long distance_left;
    long distance_right;
loop:

    get_left_right(room_buffer, &leftP, &rightP, robot_index, roomc);
    if (leftP == -1 && rightP == -1) goto halt;

    get_distance_lr(leftP, rightP, &distance_left, &distance_right, robot_index);

    if (distance_left <= 0) {
        goto move_right;
    }
    else if (distance_right <= 0) {
        goto move_left;
    }
    else if (distance_left < distance_right) {
        goto move_left;
    }
    else if (distance_right < distance_left) {
        goto move_right;
    }
    else {
        goto halt;
    }

move_left:

    move_to(room_buffer, &robot_index, leftP);
    coins_collected++;
    distance = distance + distance_left;
    goto loop;

move_right:

    move_to(room_buffer, &robot_index, rightP);
    coins_collected++;
    distance = distance + distance_right;
    goto loop;

halt:

    printf("%li %li\n", distance, coins_collected);
    return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
1
R

correct output
0 0

user output
0 0

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
10
...R......

correct output
0 0

user output
0 0

Test 3

Group: 1, 2

Verdict:

input
10
**.R...***

correct output
12 5

user output
12 10

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
10
***R******

correct output
0 0

user output
0 0

Test 5

Group: 1, 2

Verdict:

input
1000
R................................

correct output
947 9

user output
947 18

Test 6

Group: 1, 2

Verdict:

input
1000
.................................

correct output
886 9

user output
886 18

Test 7

Group: 1, 2

Verdict:

input
1000
.....*..*....**..**..*......*....

correct output
1287 400

user output
1287 800

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
1000
************.*****************...

correct output
0 0

user output
0 0

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
1000
******************************...

correct output
0 0

user output
0 0

Test 10

Group: 1, 2

Verdict:

input
1000
R*****************************...

correct output
999 999

user output
999 1998

Test 11

Group: 1, 2

Verdict:

input
1000
******************************...

correct output
999 999

user output
999 1998

Test 12

Group: 2

Verdict:

input
10000
.......**........*...........*...

correct output
10971 999

user output
10971 1998

Test 13

Group: 2

Verdict:

input
10000
*..*....*......*.....*..*........

correct output
9999 999

user output
9999 1998

Test 14

Group: 2

Verdict:

input
10000
*.*.*...**.*...*....**.**.**.....

correct output
18766 5000

user output
18766 10000

Test 15

Group: 2

Verdict:

input
10000
R*****************************...

correct output
9999 9999

user output
9999 19998

Test 16

Group: 2

Verdict:

input
10000
******************************...

correct output
9999 9999

user output
9999 19998

Test 17

Group: 2

Verdict: ACCEPTED

input
200000
.................................

correct output
0 0

user output
0 0

Test 18

Group: 2

Verdict:

input
200000
.................................

correct output
299934 10000

user output
299934 20000

Test 19

Group: 2

Verdict:

input
200000
**.***....**..**.....***.*..*....

correct output
299998 100000

user output
(empty)

Test 20

Group: 2

Verdict: ACCEPTED

input
200000
******************************...

correct output
0 0

user output
0 0

Test 21

Group: 2

Verdict:

input
200000
R................................

correct output
133765 3

user output
133765 6

Test 22

Group: 2

Verdict:

input
200000
R................................

correct output
199982 5000

user output
199982 10000

Test 23

Group: 2

Verdict:

input
200000
R*****************************...

correct output
199999 199999

user output
(empty)

Test 24

Group: 2

Verdict:

input
200000
******************************...

correct output
199999 199999

user output
(empty)