Problem B
Sun and Moon
You recently missed an eclipse and are waiting for the next one! To see any eclipse from your home, the sun and the moon must be in alignment at specific positions. You know how many years ago the sun was in the right position, and how many years it takes for it to get back to that position. You know the same for the moon. When will you see the next eclipse?
Input
The input consists of two lines.
The first line contains two integers,
The second line contains two integers,
Output
Output a single integer, the number of years until the next
eclipse. The data will be set in such a way that there is not
an eclipse happening right now and there will be an eclipse
within the next
Sample Input 1 | Sample Output 1 |
---|---|
3 10 1 2 |
7 |