message: Update people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list.cpp
diff: -// Time: O(n * c * l + n^2 * c), n is favoriteCompanies.length
  -// , c is the max of favoriteCompanies[i].length
  +// Time: O(n * m * l + n^2 * m), n is favoriteCompanies.length
  +// , m is the max of favoriteCompanies[i].length
  // , l is the max of favoriteCompanies[i][j].length
  -// Space: O(n * c * l)
  +// Space: O(n * m * l)
  class Solution {
  public:
  