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Description ![]() The wires can be combined at any angle, but may not intersect. Beware of floating point errors. Input Each data set consists of a number 0 < K <= 20 on a line by itself, followed by a line of K space-separated numbers ai. Each number is in the range 0 < ai < 107, and has at most 3 digits after the decimal point.
The input will be terminated by a zero on a line by itself. Output For each test case, there should be one word on a line by itself; "YES" if it is possible to make a simple connected figure out of the given arcs, and "NO" if it isn’t. Sample Input 1 4.000 2 1.000 1.000 3 1.455 2.958 4.424 7 1.230 2.577 3.411 2.968 5.301 4.398 6.777 0 Sample Output NO YES NO YES Source |
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