TASK

Problem

#98

Given an integer `n`, print the smallest even integer that is greater than or equal to `n`.

EXAMPLE

Example

Input

1

Output

2

LIMITS

Constraints

|n| ≤ 10^9.

📖

LEARN Theory for this problem

+

These exercises combine arithmetic, comparisons, and small branches. Keep each condition explicit and easy to verify.

Connection to “Next Even Number”: here, intermediate values are best kept in named variables so the formula stays readable and data types remain clear.

💡

NEED HELP? Hints

+

['Break the task into a few simple checks instead of compressing everything into a clever expression.', 'After solving “Next Even Number”, verify the algorithm on your own small example and on an allowed boundary case. Print only the required result with no extra text.']

✓

ANSWER Solution

+

#include <iostream>
using namespace std;
int main() {
    long long n;
    cin >> n;
    cout << (n%2==0?n+2:n+1) << '\n';
    return 0;
}