CSES - Datatähti 2025 alku

CSES - Datatähti 2025 alku - Results

Submission details
Task:	Robotti
Sender:	osmukka
Submission time:	2024-11-04 13:08:46 +0200
Language:	C++ (C++17)
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	WRONG ANSWER	0.00 s	1, 2	details
#3	WRONG ANSWER	0.00 s	1, 2	details
#4	ACCEPTED	0.00 s	1, 2	details
#5	WRONG ANSWER	0.00 s	1, 2	details
#6	RUNTIME ERROR	0.00 s	1, 2	details
#7	RUNTIME ERROR	0.00 s	1, 2	details
#8	ACCEPTED	0.00 s	1, 2	details
#9	ACCEPTED	0.00 s	1, 2	details
#10	WRONG ANSWER	0.00 s	1, 2	details
#11	ACCEPTED	0.00 s	1, 2	details
#12	WRONG ANSWER	0.00 s	2	details
#13	RUNTIME ERROR	0.00 s	2	details
#14	RUNTIME ERROR	0.01 s	2	details
#15	WRONG ANSWER	0.01 s	2	details
#16	ACCEPTED	0.00 s	2	details
#17	RUNTIME ERROR	0.01 s	2	details
#18	RUNTIME ERROR	0.01 s	2	details
#19	RUNTIME ERROR	0.01 s	2	details
#20	RUNTIME ERROR	0.01 s	2	details
#21	RUNTIME ERROR	0.01 s	2	details
#22	RUNTIME ERROR	0.01 s	2	details
#23	RUNTIME ERROR	0.01 s	2	details
#24	RUNTIME ERROR	0.01 s	2	details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:35:9: warning: variable 'middle' set but not used [-Wunused-but-set-variable]
   35 |     int middle;
      |         ^~~~~~
input/code.cpp:40:65: warning: 'robot_index' may be used uninitialized in this function [-Wmaybe-uninitialized]
   40 |         d_right = robot_index < coin_rooms[coin_rooms.size()-1] ? coin_rooms[robot_index+1]-coin_rooms[robot_index] : 999999;
      |                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Code

#include <iostream>
#include <vector>
#include <string>

int main()
{
    int amount;
    char rooms[50000];
    int robot_index;
    int steps = 0;
    int coins = 0;

    std::cin >> amount;
    std::cin >> rooms;

    std::vector<int> coin_rooms;
    for(int i = 0; i < amount; i++)
    {
        switch(rooms[i])
        {
            case '*':
                coin_rooms.push_back(i);
                break;
            case 'R':
                coin_rooms.push_back(i);
                robot_index = coin_rooms.size()-1;
                break;
            default:
                break;
        }
    }
    
    int d_left;
    int d_right;
    int middle;
    for(int i = 0; i < amount; i++)
    {
        middle = coin_rooms[robot_index];
        d_left = robot_index > 0 ? coin_rooms[robot_index]-coin_rooms[robot_index-1] : 999999;
        d_right = robot_index < coin_rooms[coin_rooms.size()-1] ? coin_rooms[robot_index+1]-coin_rooms[robot_index] : 999999;
        
        if(d_left < d_right)
        {
            steps += d_left;
            coin_rooms.erase(coin_rooms.begin()+robot_index);
            robot_index--;
        }
        else if(d_right < d_left)
        {
            steps += d_right;
            coin_rooms.erase(coin_rooms.begin()+robot_index);
        }
        else if(d_left == d_right)
        {
            break;
        }
        coins++;
    }
    
    std::cout << steps << ' ' << coins << std::endl;
    
    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: WRONG ANSWER

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

correct output
`0 0` view save

user output
`-3 1` view save

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

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

correct output
`12 5` view save

user output
`12 6` 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: WRONG ANSWER

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

correct output
`947 9` view save

user output
`947 10` view save

Test 6

Group: 1, 2

Verdict: RUNTIME ERROR

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

correct output
`886 9` view save

user output
(empty)

Error:

code: malloc.c:2617: sysmalloc: Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.

Test 7

Group: 1, 2

Verdict: RUNTIME ERROR

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

correct output
`1287 400` view save

user output
`298 1000` view save

Error:

munmap_chunk(): invalid pointer

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: WRONG ANSWER

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

correct output
`999 999` view save

user output
`999 1000` 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
`10971 1000` view save

Test 13

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`9999 999` view save

user output
(empty)

Error:

malloc(): invalid size (unsorted)

Test 14

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`18766 5000` view save

user output
(empty)

Error:

malloc(): invalid next size (unsorted)

Test 15

Group: 2

Verdict: WRONG ANSWER

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

correct output
`9999 9999` view save

user output
`9999 10000` 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: RUNTIME ERROR

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

correct output
`0 0` view save

user output
(empty)

Test 18

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`299934 10000` view save

user output
(empty)

Test 19

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`299998 100000` view save

user output
(empty)

Test 20

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`0 0` view save

user output
(empty)

Test 21

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`133765 3` view save

user output
(empty)

Test 22

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`199982 5000` view save

user output
(empty)

Test 23

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`199999 199999` view save

user output
(empty)

Test 24

Group: 2

Verdict: RUNTIME ERROR

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

correct output
`199999 199999` view save

user output
(empty)

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 (osmukka)