Delivery Fee
Programming Basics · C#
TASK
Problem
Given an order price, add a delivery fee of 100 when the price is below 1000; otherwise leave the price unchanged. Print only the required answer; do not print prompts, labels, or debug text.
EXAMPLE
Example
1200
1200
LIMITS
Constraints
- Every token parsed with `int.Parse` is a valid 32-bit signed integer; test data avoid unintended overflow in the task's intended calculation. - Input is syntactically valid for the task except where invalid input is deliberately being tested (for example a `TryParse`/validation exercise). - Print only the required answer; do not add prompts, labels, debug text, or extra spaces/lines.
LEARN
Theory for this problem
+
Piecewise formulas are best expressed as clear, exhaustive branches. Check branch boundaries carefully so every input follows exactly one intended rule. For **Delivery Fee**, the concrete requirement is: Given an order price, add a delivery fee of 100 when the price is below 1000; otherwise leave the price unchanged. Keep input parsing, the core operation, and output formatting separate so each part can be checked independently. Before coding, trace the first example by hand and identify the smallest valid or boundary-shaped input; this exposes off-by-one, sign, empty/single-element, and formatting mistakes before they reach the implementation.
NEED HELP?
Hints
+
['Piecewise formulas are best expressed as clear, exhaustive branches. Check branch boundaries carefully so every input follows exactly one intended rule.', 'Before coding, state this exact input-to-output rule: Given an order price, add a delivery fee of 100 when the price is below 1000; otherwise leave the price unchanged.', 'Trace the public example by hand, then test the smallest input and the edge case most likely to change an index, branch, tie, or empty result.']
ANSWER
Solution
+
using System;
class Program
{
static void Main()
{
int price=int.Parse(Console.ReadLine());
int result=price>=1000?price:price+100;
Console.WriteLine(result);
}
}