text: class Solution {
  public:
      int minDeletionSize(vector<string>& strs) {
          int cnt = 0;
          for(int i = 0; i < strs[0].size(); ++i){
              for(int j = 0; j < strs.size()-1; ++j){
                  if(strs[j][i] > strs[j+1][i]){
                      cnt++;
                      break;
                  }
              }
          }
          return cnt;
      }
  };
  