Tauschhandel

Combinatorial optimization problems arise across logistics, scheduling, and engineering, and C++ remains a language of choice when performance matters. This lecture takes a practical look at solving such problems in C++, using the Electric Vehicle Routing Problem as a running example. We begin with an exact solver, formulating the problem as a mixed-integer program and trying to solve it through GLPK's C API directly from C++. Exact methods, however, quickly hit their limits on real-world instances. The second half of the talk turns to metaheuristics: how they are designed, why C++ is particularly well suited for implementing them, and what design choices matter most in practice. We'll walk through a concrete implementation, touching on data structures for fast neighborhood evaluation, generic algorithm design with templates, and the performance considerations that separate a prototype from a production-ready solver. The goal is not to advocate for one approach over another, but to show how C++ supports the full spectrum of optimization techniques. # About Speaker Luka Matijević is a researcher at the Mathematical Institute of the Serbian Academy of Sciences and Arts, whose work bridges academic research and freelance engineering. He's drawn to identifying the right algorithm for a given problem — and to the kind of careful optimization captured by one of his favourite Futurama lines: *"When you do things right, people won't be sure you've done anything at all."* ## 📅 Event Details | | | | --- | --- | | 👤 **Speaker** | **[Luka Matijević](https://www.linkedin.com/in/luka-matijevic/)** | | 🕕 **Date & Time** | **27th of May (Wednesday), 6 pm** | | 📍 **Location** | **Beograđanka, Vidikovac, 22nd floor** | | 🏢 **Address** | **Masarikova 5** | | 💻 **Online** | **[C++ Serbia YouTube](https://www.youtube.com/@cppserbia)** | See you!

The aim of this group is to get together and practice our German. Doesn’t matter if are a beginner or a native speaker. The goal is to speak and improve our German. Everyone is welcome! If the weather is good, look for us in the Biergarten. Pro Tip: Get there before 6:00 for happy hour pricing.

Join us for the first gathering of The Pause Collective — a supportive meetup for neurodivergent women navigating perimenopause, menopause, burnout, overwhelm, and life transitions. This will be a relaxed, low-pressure coffee shop meetup focused on connection and conversation. No need to prepare anything. No pressure to share. Come as you are. We’ll spend time getting to know each other, talking about what brought us here, and exploring what kind of community we’d like to create together. This space is neurodivergent-affirming, self-diagnosis-friendly, and supportive of different communication styles and energy levels.

Join us as we get together to see Paul Rudd in the latest comedy-drama-musical from John Carney, POWER BALLAD! The film follows a washed-up wedding singer, a fading boy band singer and a stolen hit song. Here’s a description, trailer and plan for this event: DESCRIPTION: Rick, a washed-up wedding singer, and Danny, a fading boy band star, bond over music and a late-night jam session. When Danny turns Rick's song into a hit, Rick sets out to reclaim the recognition he believes he deserves. Power Ballad is written/directed by John Carney, the master of the modern musical and creative mind behind Once, Begin Again and Sing Street! It stars Paul Rudd, Nick Jonas, Peter McDonald, Marcella Plunkett, Havana Rose Liu and Jack Reynor. BUZZ & ACCLAIM: The film premiered to rave reviews at this year’s Dublin International Film Festival where critics call it “a sure-fired crowd-pleaser” that “just might be the feel-good hit of the year!” Others say, “Paul Rudd delivers a career-best performance in this charmer” that’s both “hilarious and deeply moving!” SUMMER OF ICE CREAM, VOL 2: SHAKE NO. 8! Ranked the #1 Ice Cream Shop in Columbus in 2024, this is the perfect place to kick off our Summer of Ice Cream and grab a sweet treat after the show! Their menu features an array of traditional, specialty and vegan shakes, hot cocoa, and more! You can check out their full menu here: [https://www.shakeno8.com/menu.php](https://www.shakeno8.com/menu.php) PLAN: We’ll plan for a 7pm-ish showing and will meet in the lobby area about 20 minutes before the show. Once showtime is announced, advance ticket purchase is advised! Once you have yours, please list your seat number in the Comments section of this event. We'll head to nearby Shake No. 8 immediately following the show! Should be a fun one, Dan

How do we recover from having had a toxic or narcissistic ex? How do we move on from the past, especially something as traumatic as a divorce or breakup? How do we avoid anxiety and depression? How do we have more self esteem? In this meeting, you will learn the mental health secrets to help you quickly get over the past and heal your mind. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

This is the 50th Anniversary of the Judgment of Paris. Significantly, in 1976, California wines unexpectedly outperformed French wines in a blind tasting with nine French judges, challenging the perception that only French wines were of the highest quality. This event helped elevate the status of California wines on the global stage and is considered a pivotal moment in wine history. House Wine, in Worthington, modestly, recreates that moment in history with a tasting both American and French wines in a fun, casual atmosphere. Come at 6:45, pay your fee at the register and join your friends for this "Judgey" tasting. https://www.wineenthusiast.com/culture/wine/the-judgment-of-paris-turns-40/ Arrive when you can and we'll have a table for gathering. Feel free to bring your own food as it is welcomed at this local gem or order from the newly opened Worthington Inn, or local favorites such as Dewey's, Everest, Jet, Worthington Tavern and The Whitney. Each person pays their tasting fee, typically $15, and gets their wine glass, then approximately five pours of the wines being served. **Parking is tough**. Try the second lot behind House Wine accessed by the land by the back parking lot or the municipal lot one block north of House Wine. **Waiver and Liability and Attendance Policy.** Participation by you and your guests means you agree to the Waiver of Liability and Attendance Policies on our Group Page. People who have two more or Attendance policy violations are subject to removal from the group.

This is an in-person meeting. Would you like to know the Real You, not just a shadow of yourself? Does your life energy feel somehow trapped within? Does your self-confidence get easily shaken? Do you get in the way of your own goals? We will discuss the real source of all this, what holds you back in life, and how to handle it so you can achieve more successful and happier living. Perhaps you get weighed down with negative emotions you can't seem to shrug off. Or find yourself doing strange and irrational things - not really being yourself. We will cover why that is and tools that work to help you unearth your self, your self-confidence and motivation. This meeting will help you learn about how to effectively overcome: -Out-of-control unwanted emotions -Low self-esteem -Anxiety -Negativity -Stress -Irrational fears -Traumatic or painfully emotional incidents -Breakups -Betrayals -Feeling like you're not really yourself -Self-doubt... We will discuss how to unleash the inner you and tap into your true potential. So come to this online meetup! This meeting is sponsored by the Hubbard Dianetics Foundation of Central Ohio

[Columbus library link to book](https://cml.bibliocommons.com/v2/record/S105C3351321) Location: The Goat River South 219 S High St, Columbus, OH 43215 Street parking is free on Sundays [Menu](https://static1.squarespace.com/static/686d3ed16745133042482c5f/t/68ff654dbb03b96875430bde/1761568077220/all_brunch-20250311.pdf) Book summary: On a hot day in Bethlehem, a twelve-year-old Palestinian-American girl is yelled at by a group of men outside the Church of the Nativity. She has exposed her legs in a biblical city, an act they deem forbidden, and their judgement will echo on through her adolescence. When our narrator finally admits to her mother that she is queer, her mother's response only intensifies a sense of shame: 'You exist too much,' she tells her daughter. Told in vignettes that flash between the U.S. and the Middle East--from New York to Jordan, Lebanon, and Palestine--Zaina Arafat's debut novel traces her protagonist's progress from blushing teen to sought-after DJ and aspiring writer.