message: Update trapping-rain-water-ii.cpp
diff: @@ -25,7 +25,7 @@ public:
  heap_.emplace(Cell{i, n_ - 1, heightMap[i][n_ - 1]});
  is_visited_[i][n_ - 1] = true;
  }
  - for (int j = 0; j < n_; ++j) {
  + for (int j = 1; j < n_ - 1; ++j) {
  heap_.emplace(Cell{0, j, heightMap[0][j]});
  is_visited_[0][j] = true;
  heap_.emplace(Cell{m_ - 1, j, heightMap[m_ - 1][j]});
  