message: Update find-in-mountain-array.cpp
diff: @@ -32,7 +32,7 @@ private:
  int binarySearch(MountainArray &A, int left, int right,
  const function<bool(int)>& check) {
  while (left <= right) {
  - const auto mid = left + (right - left) / 2;
  + const auto& mid = left + (right - left) / 2;
  if (check(mid)) {
  right = mid - 1;
  } else {
  