TASK

Problem

#4

In “Double Sum”, given two integers `a` and `b`, print twice their sum.

EXAMPLE

Example

Input

3 5

Output

16

LIMITS

Constraints

|a|, |b| ≤ 10^9. The answer fits in signed 64-bit integer.

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LEARN Theory for this problem

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Use `long long` for integer arithmetic when products may exceed 32-bit `int`.

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

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NEED HELP? Hints

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['Read both values, compute the requested expression, then print only the result.', 'After solving “Double Sum”, verify the algorithm on your own small example and on an allowed boundary case. Print only the required result with no extra text.']

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ANSWER Solution

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#include <iostream>
using namespace std;
int main() {
    long long a, b;
    cin >> a >> b;
    long long result = 2 * (a + b);
    cout << result << '\n';
    return 0;
}