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fineman999 / Algorithm

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Closed fineman999 closed 1 year ago

fineman999 commented 1 year ago

fineman999 commented 1 year ago

fineman999 commented 1 year ago

x1,y1 x2,y2 x3,y3 이면 (x1y2 + x2y3 + x3y1) - (y1x2+y2x3+y3x1) 음수면 시계방향 양수면 반시계방향 같으면 일직선