CSES - NOI 2019 - Results
Submission details
Task:Thieves and Prisons
Sender:Luis Galan
Submission time:2019-03-06 13:06:58 +0200
Language:Java
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
#30
#40
#50
Test results
testverdicttimegroup
#10.23 s2, 4, 5details
#20.22 s2, 4, 5details
#30.22 s2, 4, 5details
#40.24 s2, 4, 5details
#50.23 s2, 4, 5details
#60.23 s4, 5details
#70.23 s4, 5details
#80.23 s4, 5details
#90.23 s1, 3, 4, 5details
#100.24 s1, 3, 4, 5details
#110.23 s1, 3, 4, 5details
#120.23 s1, 3, 4, 5details
#130.24 s1, 3, 4, 5details
#140.23 s1, 3, 4, 5details
#150.23 s1, 3, 4, 5details
#160.23 s1, 3, 4, 5details
#170.24 s1, 2, 3, 4, 5details
#180.23 s1, 3, 4, 5details
#190.23 s2, 5details
#200.23 s2, 5details
#210.24 s2, 5details
#220.23 s5details
#230.24 s5details
#240.23 s3, 4, 5details
#250.23 s3, 4, 5details
#260.23 s3, 4, 5details
#270.23 s3, 4, 5details
#280.23 s4, 5details
#290.23 s4, 5details
#300.23 s4, 5details
#310.23 s4, 5details
#320.24 s2, 4, 5details
#330.23 s2, 4, 5details
#340.23 s2, 4, 5details
#350.23 s2, 4, 5details
#360.23 s3, 5details
#370.23 s3, 5details
#380.24 s3, 5details
#390.24 s3, 5details
#400.23 s5details
#410.23 s5details
#420.23 s5details
#430.23 s5details
#440.23 s2, 5details
#450.23 s2, 5details
#460.23 s2, 5details
#470.23 s2, 5details

Code

import java.util.Scanner;
import java.util.ArrayList;
import java.util.Arrays;

public class brute {

    public static boolean isInPrison(int thief_prisonIndex) {
        return thief_prisonIndex != -1;
    }

    public static boolean isOpenValid(int[] thieves, int thief, int tentativePrison) {
        boolean prisonEmpty = true;
        for (int i = 0; i < thieves.length; i++) {
            if (thieves[i] == tentativePrison) {
                prisonEmpty = false;
                break;
            }
        }
        if (prisonEmpty) {
            return false;
        }
        return true;
    }

    public static class Event {
        boolean type; // false = C, true = O
        int thief;
        int prison;

        public Event(boolean type, int thief) {
            this.type = type;
            this.thief = thief;
            this.prison = -1;
        }
    }

    public static void main(String[] args) {
        // int n = 3; // number of thieves
        // int k = 2; // number of prisons
        // int m = 5; // number of events

        // Event[] events = new Event[] { new Event(false, 1), new Event(false, 2), new Event(true, 3), new Event(true, 2),
        //         new Event(false, 1), };

        Scanner scanner = new Scanner(System.in);

        String[] line1 = scanner.next().split(" ");
        int n = Integer.parseInt(line1[0]);
        int k = Integer.parseInt(line1[1]);
        int m = Integer.parseInt(line1[2]);

        Event[] events = new Event[m];
        for (int i = 0; i < m; i++) {
            String[] next = scanner.next().split(" ");
            boolean type = next[0] == "O";
            int thief = Integer.parseInt(next[1]);
            events[i] = new Event(type, thief);
        }

        // backtracking algorithm
        
        boolean possible = true;

        int[] thieves = new int[n];
        Arrays.fill(thieves, -1);

        ArrayList<int[]> history = new ArrayList<>();
        history.add(thieves);

        int index = 0;

        while (true) {
            if (index >= events.length) {
                break;
            }

            if (index < 0) {
                possible = false;
                break;
            }

            int[] curThieves = history.get(history.size() - 1);
            Event curEvent = events[index];

            curEvent.prison++;
            if (curEvent.prison >= k || // we have exhausted all possible configurations
                    isInPrison(curThieves[curEvent.thief - 1])) { // thief is in prison, can't take an action
                // backtrack
                curEvent.prison = -1;
                history.remove(history.size() - 1);
                index--;
                continue;
            }

            if (events[index].type == false) { // a thief has been caught
                // catch the thief
                int[] nextThieves = curThieves.clone();
                nextThieves[curEvent.thief - 1] = curEvent.prison;
                history.add(nextThieves);
                index++;
            } else { // a thief has opened a gate
                if (isOpenValid(curThieves, curEvent.thief - 1, curEvent.prison)) {
                    int[] nextThieves = curThieves.clone();
                    // free all prisoners
                    for (int i = 0; i < nextThieves.length; i++) {
                        if (nextThieves[i] == curEvent.prison) {
                            nextThieves[i] = -1;
                        }
                    }
                    history.add(nextThieves);
                    index++;
                    continue;
                } else {
                    // illegal action
                    continue;
                }
            }
        }

        if (possible) {
            String outStr = "";
            for (int i = 0; i < events.length; i++) {
                outStr += (events[i].prison + 1) + " ";
                System.out.println(events[i].prison + 1);
            }
        } else {
            System.out.println("IMPOSSIBLE");
        }

        scanner.close();
    }
}

Test details

Test 1

Group: 2, 4, 5

Verdict:

input
1 1 1
C 1

correct output

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 2

Group: 2, 4, 5

Verdict:

input
1 1 1
O 1

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 3

Group: 2, 4, 5

Verdict:

input
1 1 2
C 1
C 1

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 4

Group: 2, 4, 5

Verdict:

input
1 1 2
C 1
O 1

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 5

Group: 2, 4, 5

Verdict:

input
1 1 2
O 1
C 1

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 6

Group: 4, 5

Verdict:

input
2 1 2
C 1
C 2

correct output
1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 7

Group: 4, 5

Verdict:

input
2 1 2
C 1
O 1

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 8

Group: 4, 5

Verdict:

input
2 1 2
C 1
O 2

correct output
1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 9

Group: 1, 3, 4, 5

Verdict:

input
3 2 5
C 1
C 2
O 3
C 1
...

correct output
1 1 1 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 10

Group: 1, 3, 4, 5

Verdict:

input
3 2 5
C 1
C 2
O 3
O 3
...

correct output
2 1 2 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 11

Group: 1, 3, 4, 5

Verdict:

input
3 2 5
C 1
C 2
O 3
O 1
...

correct output
2 1 2 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 12

Group: 1, 3, 4, 5

Verdict:

input
3 2 5
C 1
C 2
O 1
O 3
...

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 13

Group: 1, 3, 4, 5

Verdict:

input
3 2 4
C 1
O 2
C 1
O 3

correct output
1 1 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 14

Group: 1, 3, 4, 5

Verdict:

input
3 2 4
C 1
O 2
C 2
O 1

correct output
1 1 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 15

Group: 1, 3, 4, 5

Verdict:

input
3 2 3
C 1
C 2
C 3

correct output
1 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 16

Group: 1, 3, 4, 5

Verdict:

input
3 2 3
O 1
C 2
C 3

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 17

Group: 1, 2, 3, 4, 5

Verdict:

input
2 2 7
C 1
O 2
O 2
O 2
...

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 18

Group: 1, 3, 4, 5

Verdict:

input
4 2 5
C 2
O 3
C 1
O 4
...

correct output
1 1 1 1 1 

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 19

Group: 2, 5

Verdict:

input
100000 100000 100000
C 1
C 2
C 3
C 4
...

correct output
50000 49999 49998 49997 49996 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 20

Group: 2, 5

Verdict:

input
100000 100000 100000
C 1
C 2
C 3
C 4
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 21

Group: 2, 5

Verdict:

input
100000 100000 100000
C 1
C 2
C 3
C 4
...

correct output
20000 20000 20000 20000 20000 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 22

Group: 5

Verdict:

input
100000 100 100000
C 1
C 2
C 3
C 4
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 23

Group: 5

Verdict:

input
100000 99 100000
C 1
C 2
C 3
C 4
...

correct output
IMPOSSIBLE

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 24

Group: 3, 4, 5

Verdict:

input
500 2 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 25

Group: 3, 4, 5

Verdict:

input
500 2 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 26

Group: 3, 4, 5

Verdict:

input
500 2 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 27

Group: 3, 4, 5

Verdict:

input
500 2 500
C 384
O 62
C 387
C 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 28

Group: 4, 5

Verdict:

input
500 250 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 29

Group: 4, 5

Verdict:

input
500 250 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 2 1 3 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 30

Group: 4, 5

Verdict:

input
500 250 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 3 2 3 3 2 2 2 5 4 2 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 31

Group: 4, 5

Verdict:

input
500 250 500
C 384
O 62
C 387
C 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 32

Group: 2, 4, 5

Verdict:

input
500 500 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 33

Group: 2, 4, 5

Verdict:

input
500 500 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 2 1 3 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 34

Group: 2, 4, 5

Verdict:

input
500 500 500
C 384
O 62
C 387
O 473
...

correct output
1 1 1 1 2 1 3 3 3 2 2 2 2 4 5 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 35

Group: 2, 4, 5

Verdict:

input
500 500 500
C 384
O 62
C 387
C 473
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 36

Group: 3, 5

Verdict:

input
100000 2 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 37

Group: 3, 5

Verdict:

input
100000 2 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 38

Group: 3, 5

Verdict:

input
100000 2 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 39

Group: 3, 5

Verdict:

input
100000 2 100000
C 89384
O 54062
C 85387
C 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 40

Group: 5

Verdict:

input
100000 50000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 41

Group: 5

Verdict:

input
100000 50000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 3 2 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 42

Group: 5

Verdict:

input
100000 50000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 3 2 3 3 3 3 3 3 4 5 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 43

Group: 5

Verdict:

input
100000 50000 100000
C 89384
O 54062
C 85387
C 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 44

Group: 2, 5

Verdict:

input
100000 100000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 45

Group: 2, 5

Verdict:

input
100000 100000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 3 2 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 46

Group: 2, 5

Verdict:

input
100000 100000 100000
C 89384
O 54062
C 85387
O 53318
...

correct output
1 1 1 1 2 1 3 3 3 3 3 3 4 5 3 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)

Test 47

Group: 2, 5

Verdict:

input
100000 100000 100000
C 89384
O 54062
C 85387
C 53318
...

correct output
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

user output
(empty)

Error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
	at brute.main(brute.java:49)