Create largest-triangle-area.cpp

Author: kamyu104

C++/largest-triangle-area.cpp

@@ -0,0 +1,23 @@
+// Time:  O(n^3)
+// Space: O(1)
+
+class Solution {
+public:
+    double largestTriangleArea(vector<vector<int>>& points) {
+        double result = 0.0;
+        for (int i = 0; i < points.size() - 2; ++i) {
+            for (int j = i + 1; j < points.size() - 1; ++j) {
+                for (int k = j + 1; k < points.size(); ++k) {
+                    result = max(result,
+                                 0.5 * abs(points[i][0] * points[j][1] +
+                                           points[j][0] * points[k][1] +
+                                           points[k][0] * points[i][1] -
+                                           points[j][0] * points[i][1] -
+                                           points[k][0] * points[j][1] -
+                                           points[i][0] * points[k][1]));
+                }
+            }
+        }
+        return result;
+    }
+};