> #include<stdio.h>
> int main()
> {
>   long n,x,y,i,count,flag;
>   scanf("%ld",&n);
>   for(i=0;i<n;i++)
>   {
>      count=2;
>      flag=2;
>      scanf("%ld %ld",&x,&y);
>      x++;y--;
>      if(y<x||y==x)
>      {
>        printf("1\n");
>        continue;
>      }
>      while(y>x)
>      {
>         if(x+flag>=y)
>         {
>            count++;
>            break;
>         }
>         if(x+flag<y)
>         {
>            x=x+flag;y=y-flag;
>            count=count+2;
>            flag++;
>         }
>      }
>      printf("%ld\n",count);
>   }
>   return 0;
> }