UVA 846 Steps

#include<cstdio>
#include<cmath>
int main()
{
    int T,x,y,z,a;
    scanf("%d",&T);
    while (T--)
    {
        scanf("%d%d",&x,&y);
        if (y==x) printf("0");
        else
        {
            z=(int)sqrt(double(y-x));
            if (z*z==y-x) 
                printf("%d",2*z-1);
            else 
            {
                a=z*z+z;
                if (y-x>a) 
                    printf("%d",2*z+1); 
                else 
                    printf("%d",2*z);
            }
        }
            printf("\n");
    }
    return 0;
 }