CSES - Datatähti 2024 alku

Submission details
Task:	Uolevin kalansaalis
Sender:	andreibe
Submission time:	2023-10-30 23:28:02 +0200
Language:	Java
Status:	READY
Result:	37

Feedback
group	verdict	score
#1	ACCEPTED	37
#2	TIME LIMIT EXCEEDED	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.12 s	1, 2	details
#2	ACCEPTED	0.12 s	1, 2	details
#3	ACCEPTED	0.12 s	1, 2	details
#4	ACCEPTED	0.12 s	1, 2	details
#5	ACCEPTED	0.12 s	1, 2	details
#6	ACCEPTED	0.12 s	1, 2	details
#7	ACCEPTED	0.12 s	1, 2	details
#8	ACCEPTED	0.14 s	1, 2	details
#9	ACCEPTED	0.12 s	1, 2	details
#10	ACCEPTED	0.12 s	1, 2	details
#11	ACCEPTED	0.12 s	1, 2	details
#12	ACCEPTED	0.12 s	1, 2	details
#13	ACCEPTED	0.13 s	1, 2	details
#14	ACCEPTED	0.12 s	1, 2	details
#15	ACCEPTED	0.13 s	1, 2	details
#16	TIME LIMIT EXCEEDED	--	2	details
#17	TIME LIMIT EXCEEDED	--	2	details
#18	TIME LIMIT EXCEEDED	--	2	details
#19	TIME LIMIT EXCEEDED	--	2	details
#20	TIME LIMIT EXCEEDED	--	2	details
#21	TIME LIMIT EXCEEDED	--	2	details
#22	TIME LIMIT EXCEEDED	--	2	details
#23	TIME LIMIT EXCEEDED	--	2	details
#24	TIME LIMIT EXCEEDED	--	2	details

Code

import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Paths;
import java.util.*;

public class Datatahti {
    int[][] ar = new int[550][550];
    int[][] debugar = new int[550][550];
    int[][] rows = new int[550][550];
    int n, m, k;
    int[][] diagonals = new int[550][550];
    int[][] diagonals2 = new int[550][550];
    void printAr(int[][] ar)
    {
        int size = 4;
        for (int y = 0; y <= n + 1; y++)
        {
            if (y % 2 == 0) System.out.print("  ");
            for (int x = 0; x <= m + 1; x++)
            {
                String s =ar[y][x] + "";
                s = s + new String(new char[size - s.length()]).replace("\0", " ");

                System.out.print(s);
            }
            System.out.println();
        }
    }
    void print()
    {
        System.out.println("Array");
        printAr(ar);
        System.out.println("Diagonals");
        printAr(diagonals);
        System.out.println("Rows");
        printAr(rows);
        System.out.println("Other dianolas");
        printAr(diagonals2);
    }
    int getVal(int[][] ar, int y, int x) {
        if (y < 0 || x < 0) return 0;
        return ar[y][x];
    }
    long alasKolmio(int y, int x, int k, boolean debug)
    {
        int sumRowSmallerX = y % 2 == 1 ? x - 1 - 1 : x-1;
        int sumRowSmallerY = y - 1;
        int rowSumSmaller = getVal(rows, sumRowSmallerY, sumRowSmallerX);

        int sumRowLargerX = y % 2 == 1 ? (x-1+k-1) : (x+k-1);
        int sumRowLargerY = y-1;
        int rowSumLarger = getVal(rows, sumRowLargerY, sumRowLargerX);

        int minDiagonalX = x + k - 1 + (y % 2 == 0 ? 1 : 0);
        int minDiagonalY = y -1;
        int diagonalSmaller = diagonals2[minDiagonalY][minDiagonalX];

        int maxDiagonalX = x + (y % 2 == 1 ? (k / 2 - 1 + k % 2) : (k / 2));
        int maxDiagonalY = y +k -1;
        int diagonalLarger = diagonals2[maxDiagonalY][maxDiagonalX];

        long result = (diagonalLarger - diagonalSmaller) - (rowSumLarger - rowSumSmaller);
        if (debug) {
            debugar[sumRowSmallerY][sumRowSmallerX] = 1;
            debugar[sumRowLargerY][sumRowLargerX] = 2;
            debugar[minDiagonalY][minDiagonalX] = 3;
            debugar[maxDiagonalY][maxDiagonalX] = 4;
            debugar[y][x] = 5;

            System.out.println("DIAG X max: " + (x+maxDiagonalX));
            System.out.println("Diag X min: " + minDiagonalX);
            System.out.println( "Y: " + y + " X: " + x + " K:" + k + "=" + result);
            System.out.println(rowSumSmaller + " " + rowSumLarger + " " + diagonalSmaller + " " + diagonalLarger);
        }

        return result;
    }
    long ylosKolmio(int y, int x, int k, boolean debug)
    {
        int rowSumSmaller = rows[y][x - 1];
        int rowSumLarger = rows[y][x + k - 1];
        boolean parillinen = (y % 2 == 0);
        int minDiagonalX = x + (parillinen ?  (k / 2) : (k / 2 - 1 + k % 2));
        int diagonalSmaller = y -k - 1 < 0 ? 0 : diagonals2[y - k -1][minDiagonalX];
        int diagonalLarger = diagonals2[y - 1][x + ( parillinen ? 0 : -1)];

        long result = (rowSumLarger - rowSumSmaller) - (diagonalLarger - diagonalSmaller);
        if (debug) {
            System.out.println("Min diagonalX: " + minDiagonalX);
            System.out.println("Y: " + y + " X: " + x + " K:" + k + "=" + result);
            System.out.println( rowSumSmaller + " " + rowSumLarger + " " + diagonalSmaller + " " + diagonalLarger);
        }

        return result;
    }

    long laskeKolmionArvoAlas(int y, int x, int k)
    {
        int lengthOfRow = k;
        int total = 0;
        for (int rivi = y; rivi <= y + k - 1; rivi++)
        {
            for (int xx = x; xx < x + lengthOfRow; xx++)
            {
                total += ar[rivi][xx];
            }
            if (rivi % 2 == 0)
                x++;
            lengthOfRow--;
        }
        return total;
    }
    long laskeKolmionArvoYlos(int y, int x, int k)
    {
        int lengthOfRow = k;
        int total = 0;
        for (int rivi = y; rivi >= y - k + 1; rivi--)
        {
            for (int xx = x; xx < x + lengthOfRow; xx++)
            {
                total += ar[rivi][xx];
            }
            if (rivi % 2 == 0)
                x++;
            lengthOfRow--;
        }
        return total;
    }
    void createRandomTest(int size) throws IOException {
        System.out.println("FNDSHJFhjn");
        Random random = new Random();
        int n = Math.abs(random.nextInt()) % size + size/2;
        int m = Math.abs(random.nextInt()) % size + size / 2;
        //int k = Math.abs(random.nextInt()) % size + size / 2;
        int k = n * m;
        StringBuilder builder = new StringBuilder();
        builder.append( n + " " + m + " " + k).append("\n");
        for (int i = 0; i < k; i++)
        {
            int a = Math.abs(random.nextInt()) % (n+1) + 1;
            int b = Math.abs(random.nextInt()) % (m+1) + 1;
            char c = Math.abs(random.nextInt()) % 2 == 0 ? 'K' : 'H';
            builder.append(a +" " + b + " " + c).append("\n");
        }
        FileWriter writer = new FileWriter("input.txt");
        writer.write(builder.toString());
        writer.close();
    }
    void main() throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(Datatahti.class.getResourceAsStream("/input.txt")));
        //Scanner scanner = new Scanner(Paths.get("input.txt"));
        //createRandomTest(300);
        //System.exit(0);
        String[] line = reader.readLine().split(" ");
        n = Integer.parseInt(line[0]);
        m = Integer.parseInt(line[1]);
        k = Integer.parseInt(line[2]);
        long kokonaismaara = 0;
        for (int i = 0; i < k; i++)
        {
            int a, b;
            char c;
            line = reader.readLine().split(" ");
            a = Integer.parseInt(line[0]);
            b = Integer.parseInt(line[1]);
            c = line[2].charAt(0);

            ar[a][b] = c == 'K' ? -10 : 1;
            kokonaismaara += ar[a][b];
        }
        int L = 520;
        // down left-right
        for (int sy = 1; sy <= L; sy += 2)
        {
            int summa = 0;
            int x = 0;
            for (int y = sy; y <= L; y++)
            {
                if (y % 2 == 1)
                    x++;
                summa += ar[y][x];
                diagonals[y][x] = summa;
            }
        }
        // right left-right
        for (int sx = 1; sx <= L; sx++)
        {
            int summa = 0;
            int x = sx;
            for (int y = 1; y <= L; y++)
            {
                if (y % 2 == 1)
                    x++;
                if (y >= ar.length || x >= ar[0].length) continue;
                summa += ar[y][x];
                diagonals[y][x] = summa;
            }
        }
        // right right-left
        for (int sx = 1; sx <= L; sx++)
        {
            int x = sx;
            int summa = 0;
            for (int y = 1; y <= L; y++)
            {
                if (y % 2 == 0)
                    x--;
                if (x < 0 || y < 0)
                    continue;
                summa += diagonals[y][x];
                diagonals2[y][x] = summa;
            }
        }

        // rows
        for (int y = 0; y <= L; y++)
        {
            int summa = 0;
            for (int x = 0; x <= L; x++)
            {
                summa += diagonals[y][x];
                rows[y][x] = summa;
            }
        }
        //System.out.println("Preparing done " + n + " " + m);
        //print();
        long minSum = 999999999;
        for (int y = 1; y <= n; y++)
        {
            //System.out.println("Y" + y);
            for (int x = 1; x <= m; x++)
            {
                // down
                int maxKDown = m + 1 - x;
                maxKDown = Math.min(maxKDown, n + 1 - y);
                // up
                int maxKUp = m + 1 - x;
                maxKUp = Math.min(maxKUp, y);

                int maxK = Math.max(maxKDown, maxKUp);
                for (int k = 1; k <= maxK; k++)
                {
                    long result;
                    long oikeaArvo;

                    if (k <= maxKDown)
                    {
                        result = k == 1 ? ar[y][x] : alasKolmio(y, x, k, false);
                        /*
                        oikeaArvo = laskeKolmionArvoAlas(y, x, k);

                        if (result != oikeaArvo)
                        {
                            alasKolmio(y,x,k, true);
                            printAr(debugar);
                            System.out.println("Arvot: " + y + " " + x + " " + k);
                            System.out.println("Tulokset eivat tasmaa alas: " + result + " vs oikea: " + oikeaArvo);
                            throw new Exception("FUCK");
                        }

                         */
                        minSum = Math.min(minSum, result);
                    }
                    if (k <= maxKUp)
                    {
                        result = k == 1 ? ar[y][x] : ylosKolmio(y, x, k, false);
                        /*
                        oikeaArvo = laskeKolmionArvoYlos(y, x, k);
                        if (result != oikeaArvo)
                        {
                            ylosKolmio(y,x,k, true);
                            System.out.println("Arvot: " + y + " " + x + " " + k);
                            System.out.println( "Tulokset eivat tasmaa ylos: " + result + " vs oikea: " + oikeaArvo);
                            throw new Exception("FUCK");
                        }

                         */
                        minSum = Math.min(minSum, result);
                    }

                    // result = ylosKolmio(y,x, k);
                    // minSum = min(minSum, result);
                }
            }
        }
        System.out.println((kokonaismaara - minSum));
    }

    public static void main(String[] args) throws Exception {
        new Datatahti().main();
    }
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
`5 6 13 1 1 K 5 1 K 2 2 H 4 2 H ...` view save

correct output
`-16` view save

user output
`-16` view save

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
`5 6 7 1 5 K 4 6 K 2 4 H 2 5 H ...` view save

correct output
`0` view save

user output
`0` view save

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
`5 6 7 5 5 K 2 6 K 2 4 H 2 5 H ...` view save

correct output
`0` view save

user output
`0` view save

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 51 3 3 H 6 3 H 9 5 H 5 10 H ...` view save

correct output
`50` view save

user output
`50` view save

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 52 3 5 H 3 1 H 9 6 H 2 8 H ...` view save

correct output
`40` view save

user output
`40` view save

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 60 6 10 H 2 8 H 5 8 H 8 10 H ...` view save

correct output
`-15` view save

user output
`-15` view save

Test 7

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 60 4 7 H 7 4 H 4 10 H 3 6 H ...` view save

correct output
`60` view save

user output
`60` view save

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 40 9 9 H 5 10 H 5 6 H 4 9 H ...` view save

correct output
`2` view save

user output
`2` view save

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
`1 1 0` view save

correct output
`0` view save

user output
`0` view save

Test 10

Group: 1, 2

Verdict: ACCEPTED

input
`1 1 1 1 1 K` view save

correct output
`0` view save

user output
`0` view save

Test 11

Group: 1, 2

Verdict: ACCEPTED

input
`1 1 1 1 1 H` view save

correct output
`0` view save

user output
`0` view save

Test 12

Group: 1, 2

Verdict: ACCEPTED

input
`10 5 32 10 3 H 4 4 H 3 3 H 5 4 H ...` view save

correct output
`20` view save

user output
`20` view save

Test 13

Group: 1, 2

Verdict: ACCEPTED

input
`5 10 32 5 9 H 2 4 H 2 9 H 2 5 H ...` view save

correct output
`28` view save

user output
`28` view save

Test 14

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 100 2 9 H 5 4 H 5 9 K 6 1 K ...` view save

correct output
`-439` view save

user output
`-439` view save

Test 15

Group: 1, 2

Verdict: ACCEPTED

input
`10 10 100 8 9 H 5 10 H 5 4 H 3 9 H ...` view save

correct output
`88` view save

user output
`88` view save

Test 16

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 125000 125 261 K 84 78 K 11 200 K 481 246 K ...` view save

correct output
`-624270` view save

user output
(empty)

Test 17

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 125100 16 61 H 37 62 H 459 125 H 318 476 H ...` view save

correct output
`124020` view save

user output
(empty)

Test 18

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 249999 22 214 H 356 145 H 341 29 H 393 262 H ...` view save

correct output
`249999` view save

user output
(empty)

Test 19

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 32000 30 81 H 315 34 H 78 112 H 367 166 H ...` view save

correct output
`10126` view save

user output
(empty)

Test 20

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 126745 164 390 H 126 331 H 164 126 H 55 92 H ...` view save

correct output
`-104692` view save

user output
(empty)

Test 21

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 71200 106 191 H 314 189 H 482 485 H 344 401 H ...` view save

correct output
`-335853` view save

user output
(empty)

Test 22

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 67772 421 277 H 428 470 H 169 142 H 256 345 H ...` view save

correct output
`-208567` view save

user output
(empty)

Test 23

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 27434 366 481 H 38 22 H 126 107 H 135 169 H ...` view save

correct output
`-57100` view save

user output
(empty)

Test 24

Group: 2

Verdict: TIME LIMIT EXCEEDED

input
`500 500 93982 183 13 H 463 230 H 264 351 H 399 290 H ...` view save

correct output
`-52800` view save

user output
(empty)

Datatähti 2024 alku

Uolevin kalansaalis

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 (andreibe)