CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:niila
Submission time:2024-10-31 16:38:41 +0200
Language:Java
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED30
#2ACCEPTED70
Test results
testverdicttimegroup
#1ACCEPTED0.13 s1, 2details
#2ACCEPTED0.18 s1, 2details
#3ACCEPTED0.18 s1, 2details
#4ACCEPTED0.18 s1, 2details
#5ACCEPTED0.18 s1, 2details
#6ACCEPTED0.18 s1, 2details
#7ACCEPTED0.19 s1, 2details
#8ACCEPTED0.18 s1, 2details
#9ACCEPTED0.18 s1, 2details
#10ACCEPTED0.18 s1, 2details
#11ACCEPTED0.19 s1, 2details
#12ACCEPTED0.20 s2details
#13ACCEPTED0.20 s2details
#14ACCEPTED0.20 s2details
#15ACCEPTED0.20 s2details
#16ACCEPTED0.20 s2details
#17ACCEPTED0.30 s2details
#18ACCEPTED0.31 s2details
#19ACCEPTED0.32 s2details
#20ACCEPTED0.29 s2details
#21ACCEPTED0.30 s2details
#22ACCEPTED0.30 s2details
#23ACCEPTED0.30 s2details
#24ACCEPTED0.31 s2details

Code

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int n = input.nextInt();
        String pathStr = input.next();

        if (n == 0 || n == 1) {
            System.out.println("0 0");
            return;
        }

        char[] path = pathStr.toCharArray();

        int pathMax = path.length - 1;
        int robot = pathStr.indexOf('R');
        int l = robot, r = robot;
        int steps = 0, coins = 0;

        while (!(path[l] == '*' && path[r] == '*')) {
            if (path[l] == '*') {  // looks ugly but what can I do
                steps += robot - l;
                robot = l;
                path[l] = '.';
                coins++;
                r = robot;
            }

            if (path[r] == '*') {
                steps += r - robot;
                robot = r;
                path[r] = '.';
                coins++;
                l = robot;
            }

            // got all coins
            if (l == 0 && r == pathMax) {
                break;
            }

            // extend search
            if (l > 0) { l--; }
            if (r < pathMax) { r++; }
        }

        System.out.println(steps + " " + coins);

        // I love using two pointers <3
    }
}

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: ACCEPTED

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

correct output
299998 100000

user output
299998 100000

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: ACCEPTED

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

correct output
199999 199999

user output
199999 199999

Test 24

Group: 2

Verdict: ACCEPTED

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

correct output
199999 199999

user output
199999 199999