from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route("/")
def nth_largest():
    nums = [10, 20, 30, 40]
    n = int(request.args.get("n", 1))
    return jsonify({"nth_largest": sorted(nums, reverse=True)[n-1]})

if __name__ == "__main__":
    app.run(port=8080)