Submission #1148152

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148152		ruben_ipenza	Coin Collecting (JOI19_ho_t4)	Java	Compilation error	0 ms	0 KiB

joi2019_ho_t4

import java.util.*;

public class joi2019_ho_t4 {
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int[][] coins = new int[2 * N][2];

        for (int i = 0; i < 2 * N; i++) {
            coins[i][0] = sc.nextInt();  // Coordenada x
            coins[i][1] = sc.nextInt();  // Coordenada y
        }

        // Lista para las posiciones objetivo
        List<int[]> targets = new ArrayList<>();

        // Generar las posiciones objetivo
        for (int i = 1; i <= N; i++) {
            targets.add(new int[]{i, 1}); // Posición (x, y) = (i, 1)
            targets.add(new int[]{i, 2}); // Posición (x, y) = (i, 2)
        }

        // Ordenar las monedas y las posiciones objetivo
        Arrays.sort(coins, Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));
        targets.sort(Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));

        // Calcular el número mínimo de movimientos
        long totalMoves = 0;

        // Sumar las distancias Manhattan
        for (int i = 0; i < 2 * N; i++) {
            totalMoves += Math.abs(coins[i][0] - targets.get(i)[0]) + Math.abs(coins[i][1] - targets.get(i)[1]);
        }

        // Imprimir el resultado
        System.out.println(totalMoves);
    }
}

Compilation message (stderr)

joi2019_ho_t4.java:26: error: array required, but Object found
        Arrays.sort(coins, Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));
                                                         ^
joi2019_ho_t4.java:26: error: array required, but Object found
        Arrays.sort(coins, Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));
                                                                                     ^
joi2019_ho_t4.java:27: error: array required, but Object found
        targets.sort(Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));
                                                   ^
joi2019_ho_t4.java:27: error: array required, but Object found
        targets.sort(Comparator.comparingInt(a -> a[0]).thenComparingInt(a -> a[1]));
                                                                               ^
4 errors

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