# UVa 10301

From Algorithmist

## 10301 - Rings and Glue[edit]

## Summary[edit]

This is a basic geometry problem about circles.

## Explanation[edit]

Two rings are glued together when the distance between two center is less than sum of radius ( dist <= r1+r2 ) and greater than the diff of radius ( dist >= fabs(r1-r2) ) A special case is two ring is totally overlap. (r1==r2 && center1==cneter2)

## Gotchas[edit]

You must print "0 rings." when number of max component is 0.

## Input[edit]

4 0.0 0.0 1.0 -1.5 -1.5 0.5 1.5 1.5 0.5 -2.0 2.0 3.5 3 3.0 2.0 2.0 0.0 -0.5 1.0 0.0 0.0 2.0 5 -2.0 0.0 1.0 1.0 -1.0 1.0 0.0 1.0 0.5 2.0 0.0 1.0 -1.0 1.0 1.0 -1

## Output[edit]

The largest component contains 4 rings. The largest component contains 2 rings. The largest component contains 3 rings.