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Problems

# Name
A
standard input/output
1 s, 256 MB
x73939
B
standard input/output
1 s, 256 MB
x11887
C
standard input/output
2 s, 256 MB
x4174
D
standard input/output
1 s, 256 MB
x3636
E
standard input/output
4 s, 256 MB
x4318

You have to set such $r_1$ and $r_2$ that all the flowers are watered, that is, for each flower, the distance between the flower and the first fountain doesn't exceed $r_1$, or the distance to the second fountain doesn't exceed $r_2$. It's OK if some flowers are watered by both fountains.