#include
     
      using namespace std;int main(){    int sum;    cin>>sum;    while(sum--)    {        int m,n,i;        cin>>m>>n;        int dis=n-m;        if(dis==0)            cout<<"0"<
      
       i*i&&dis<(i+1)*(i+1))                {                    if(dis<=i*(i+1))                    {                        cout<<2*i<