#include"stdio.h"
#include"math.h"

main()
{int n;
 long x,y,z,k,j=0,p=0;
    scanf("%d",&n);
    while(n)
    {   scanf("%d%d",&x,&y);
       z=y-x;k=0;
       for(p=1;;p++)
          {  k+=p;
              j++;
              if(z<=(2*k))  break;
           }
       if(z<(2*k-j)) printf("%ld\n",(2*j-2));
          else  
                  if(z<2*k) printf("%ld\n",2*j-1);
                 else printf("%ld\n",2*j);        
        n--;
      }
 }