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  1. Prepare
  2. Mathematics
  3. Algebra
  4. Number Groups
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Number Groups

  • v_28000
     + 0 comments
    ** Does anyone know why below code give wrong answer on some test cases**

    public static long sumOfGroup(int k) {

     long ele=(k*(k-1))+1;
long sum=(k*(2*ele+(k-1)*2))/2;
return sum;



}