Multiple input terminated by EOF.
4 1 0 0 3 0 3 3 0 3 1 1 5 2 2 0 2 2 0 2 -2 0 0 -2 0 0 1 1 4 3 0 0 3 0 3 3 0 3 1 1 1 2 2 2
2.0000000000 1.0000000000 0.7500000000
Info: 本題輸出為浮點數，絕對或相對誤差 1e-4 以下視為正確
Migrated from old NTUJ.
JAG 2011 winter camp
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