message: Update number-of-pairs-of-interchangeable-rectangles.cpp
diff: @@ -6,7 +6,7 @@ public:
  long long interchangeableRectangles(vector<vector<int>>& rectangles) {
  unordered_map<int, unordered_map<int, int>> lookup;
  for (const auto& rect : rectangles) {
  - const int g = gcd(rect[0], rect[1]); // Time: O((logx)^2) ~= O(1)
  + const int g = gcd(rect[0], rect[1]); // Time: O(logx) ~= O(1)
  ++lookup[rect[0] / g][rect[1] / g];
  }
  int64_t result = 0;
  