Given the lengths a, b, and c of the sides of a triangle,calculate the area - 问题

问题4307--Given the lengths a, b, and c of the sides of a triangle,calculate the area

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时间限制 : 1.000 sec 内存限制 : 128 MB

a. a = 2cm, b = 3cm, c = 4cm
b. a = 3m, b = 4m, c = 5m
c. a = 4in, b = 5in, c = 6in

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