10784 - Diagonals

[sazzadcsedu]

whats wrong with my code??
plz someone help.
is my code/algo ok?

Code: Select all

          #include<stdio.h>
          #include<math.h> 

         int  main()


      { 
         unsigned  long long x;
         long long n;
         long long a,b,c; 
         int  ncase=1;
         while(scanf("%llu",&x)==1)
         {
 
           if(x==0)
           break;   

          a=1;
          b=-3;
          c=(-2)*x;
          n=(int)((-b+sqrt(b*b-4*a*c))/2*a);
          n=n+1;
          printf("Case %d: %lld\n",ncase,n);

     ncase++;
     
        }
      
   return 0;
   }


[newkid]

i think your solution will fail when x (the input) is 9.
what does your program outputs for that?

[newkid]

my acc program returns 6 for 9 while your one returns 7
hope it helps