class MatrixCoordinate implements Comparable<MatrixCoordinate> {
    private final int row;
    private final int col;

    MatrixCoordinate(final int row, final int col) {
        this.row = row;
        this.col = col;
    }

    @Override
    public String toString() {
        return "Row: " + row + ", Column: " + col;
    }

    // Generated equals and hashcode.

    @Override
    public boolean equals(final Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        final MatrixCoordinate that = (MatrixCoordinate) o;

        return row == that.row && col == that.col;
    }

    @Override
    public int hashCode() {
        int result = row;
        result = 31 * result + col;
        return result;
    }

    @Override
    public int compareTo(MatrixCoordinate o) {
        int rowComparison = Integer.compare(row, o.row);
        return (rowComparison == 0) ? Integer.compare(col, o.col) : rowComparison;
    }
}