题目描述
There are two rectangles. The lengths of the vertical sides of the first rectangle are A, and the lengths of the horizontal sides of the first rectangle are B. The lengths of the vertical sides of the second rectangle are C, and the lengths of the horizontal sides of the second rectangle are D.
Print the area of the rectangle with the larger area. If the two rectangles have equal areas, print that area.
Constraints
- All input values are integers.
- 1≤A≤10^4
- 1≤B≤10^4
- 1≤C≤10^4
- 1≤D≤10^4
Input
The input is given from Standard Input in the following format:
A B C D
Output
Print the area of the rectangle with the larger area. If the two rectangles have equal areas, print that area.
Examples
Input
3 5 2 7
Output
15
Input
100 600 200 300
Output
60000
输入格式
见题面
输出格式
见题面
样例输入
100 600 200 300
样例输出
60000