CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:osmukka
Submission time:2024-11-04 16:07:00 +0200
Language:C++ (C++17)
Status:READY
Result:30
Feedback
groupverdictscore
#1ACCEPTED30
#20
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 2details
#2ACCEPTED0.00 s1, 2details
#3ACCEPTED0.00 s1, 2details
#4ACCEPTED0.00 s1, 2details
#5ACCEPTED0.00 s1, 2details
#6ACCEPTED0.00 s1, 2details
#7ACCEPTED0.00 s1, 2details
#8ACCEPTED0.00 s1, 2details
#9ACCEPTED0.00 s1, 2details
#10ACCEPTED0.00 s1, 2details
#11ACCEPTED0.00 s1, 2details
#12ACCEPTED0.00 s2details
#13ACCEPTED0.00 s2details
#14ACCEPTED0.01 s2details
#15ACCEPTED0.01 s2details
#16ACCEPTED0.00 s2details
#17ACCEPTED0.01 s2details
#18ACCEPTED0.01 s2details
#190.13 s2details
#20ACCEPTED0.01 s2details
#21ACCEPTED0.01 s2details
#22ACCEPTED0.01 s2details
#23--2details
#24--2details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:36:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         d_right = robot_index < coin_rooms.size()-1 ? coin_rooms[robot_index+1]-coin_rooms[robot_index] : 200001;
      |                   ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
input/code.cpp:35:58: warning: 'robot_index' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |         d_left = robot_index > 0 ? coin_rooms[robot_index]-coin_rooms[robot_index-1] : 200001;
      |                                                          ^

Code

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

int main()
{
    int amount;
    char rooms[200000];
    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':
                robot_index = coin_rooms.size();
                coin_rooms.push_back(i);
                break;
        }
    }
    
    int d_left;
    int d_right;
    for(int i = 0; i < amount; i++)
    {
        d_left = robot_index > 0 ? coin_rooms[robot_index]-coin_rooms[robot_index-1] : 200001;
        d_right = robot_index < coin_rooms.size()-1 ? coin_rooms[robot_index+1]-coin_rooms[robot_index] : 200001;
        
        if(d_left < d_right)
        {
            steps += d_left;
            coin_rooms.erase(coin_rooms.begin()+robot_index);
            robot_index--;
            coins++;
        }
        else if(d_right < d_left)
        {
            steps += d_right;
            coin_rooms.erase(coin_rooms.begin()+robot_index);
            coins++;
        }
        else if(d_left == d_right)
        {
            break;
        }
    }
    
    std::cout << steps << ' ' << coins << "\n";
    
    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: ACCEPTED

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

correct output
12 5

user output
12 5

Test 4

Group: 1, 2

Verdict: ACCEPTED

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

correct output
0 0

user output
0 0

Test 5

Group: 1, 2

Verdict: ACCEPTED

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

correct output
947 9

user output
947 9

Test 6

Group: 1, 2

Verdict: ACCEPTED

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

correct output
886 9

user output
886 9

Test 7

Group: 1, 2

Verdict: ACCEPTED

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

correct output
1287 400

user output
1287 400

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: ACCEPTED

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

correct output
999 999

user output
999 999

Test 11

Group: 1, 2

Verdict: ACCEPTED

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

correct output
999 999

user output
999 999

Test 12

Group: 2

Verdict: ACCEPTED

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

correct output
10971 999

user output
10971 999

Test 13

Group: 2

Verdict: ACCEPTED

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

correct output
9999 999

user output
9999 999

Test 14

Group: 2

Verdict: ACCEPTED

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

correct output
18766 5000

user output
18766 5000

Test 15

Group: 2

Verdict: ACCEPTED

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

correct output
9999 9999

user output
9999 9999

Test 16

Group: 2

Verdict: ACCEPTED

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

correct output
9999 9999

user output
9999 9999

Test 17

Group: 2

Verdict: ACCEPTED

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

correct output
0 0

user output
0 0

Test 18

Group: 2

Verdict: ACCEPTED

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

correct output
299934 10000

user output
299934 10000

Test 19

Group: 2

Verdict:

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

correct output
299998 100000

user output
299996 99999

Test 20

Group: 2

Verdict: ACCEPTED

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

correct output
0 0

user output
0 0

Test 21

Group: 2

Verdict: ACCEPTED

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

correct output
133765 3

user output
133765 3

Test 22

Group: 2

Verdict: ACCEPTED

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

correct output
199982 5000

user output
199982 5000

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)