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  1. Prepare
  2. Algorithms
  3. Strings
  4. Gemstones
  5. Discussions

Gemstones

  • elmehdi_mido
     + 0 comments

    java

    public static int gemstones(List<String> arr) {
    // Write your code here
      int[] alpha = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
      int count = 0;
      int size = arr.size();
      for(String s : arr){
          char[] chars = s.chars()
                .distinct()
                .mapToObj(c -> String.valueOf((char) c))
                .collect(Collectors.joining()).toCharArray();
                
          for(int i=0;i<chars.length;i++){
               
             alpha[(int) (chars[i]-'a')]++; 
                       
              if(alpha[(int) (chars[i]-'a')]==size){
                  count ++;
              }
          }
      }
      return count;
    }