Problem
A rectangle has two sides of length width and two sides of length height. Its perimeter is the total length of all four sides.
Implement rectangle_perimeter(width, height).
Input
width: The width of the rectangle. height: The height of the rectangle.
Output
Return the perimeter as an integer.
Constraints
1 ≤ width, height ≤ 1,000,000
Examples
Input:
width = 3
height = 5
Expected output:
expected = 16Input:
long long width = 3;
long long height = 5;
Expected output:
long long expected = 16;Input:
long width = 3;
long height = 5;
Expected output:
long expected = 16;Explanation
Two sides of 3 and two sides of 5: 3 + 3 + 5 + 5 = 16.
Input:
width = 7
height = 7
Expected output:
expected = 28Input:
long long width = 7;
long long height = 7;
Expected output:
long long expected = 28;Input:
long width = 7;
long height = 7;
Expected output:
long expected = 28;Explanation
A square is a rectangle too: 4 × 7 = 28.
How to approach it
Try on your own first, then open one hint at a time.
Hint 1
A rectangle has two equal widths and two equal heights.
Hint 2
Add all four sides, or combine the two repeated side lengths first.
Hint 3
Watch for integer arithmetic only; no special cases are needed here.
Expected complexity
O(1) time, O(1) extra space
References
This challenge is adapted for CodeUtility. Follow the statement and constraints above.