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pick定理的應用——簡單的計算幾何問題Triangle

The input test file will contain multiple test cases. Each input test case consists of six integers x1y1x2y2x3, and y3, where (x1y1), (x2y2), and (x3y3) are the coordinates of vertices of the triangle. All triangles in the input will be non-degenerate (will have positive area), and −15000 ≤ x

1y1,x2y2x3y3 ≤ 15000. The end-of-file is marked by a test case with x1 =  y1 = x2 = y2 = x3 = y3 = 0 and should not be processed.