WA#7
Here is my code:

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

main()
{
   long  ans,x=0,y,i,j,k=0,l,m,n;
    scanf("%ld %ld",&m,&n);
    if(m>n){ans=m;m=n;n=ans;}
    for(i=0;i<=100009;i++)
      {
        if((m>i*i)&&(x==0)&&(m<=(i+1)*(i+1)))x=i+1;
        if((n>i*i)&&(k==0)&&(n<=(i+1)*(i+1)))k=i+1;
        if((x!=0)&&(k!=0))break;
      }
    y=m-(x-1)*(x-1);l=n-(k-1)*(k-1);
    if(m!=1)if(y%2==0)x=x*2-2;else x=x*2-1;
    if(l%2==0)k=k*2-2;else k=k*2-1;
    ans=fabs(k-x);
    y=(y+1)/2;l=(l+1)/2;
    if((l>=y)&&(l<=y+k-x))ans+=0;else
      {
        m=abs(l-y);n=abs(y+k-x-l);
        l=m>n?n:m;
        ans+=2*l;
      }
    printf("%ld\n",ans);


  return 0;
  }

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