812. Largest Triangle Area

Approach1:  class Solution { public:          double findMax( vector<int> a , vector<int> b ,vector<int> c){         return 0.5 * abs( a[0] * b[1] + b[0] * c[1] + c[0] * a[1] - a[1] * b[0] - b[1] * c[

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