#include <iostream>
#include <vector>
using namespace std;
int main()
{
	vector<int> squares;
	for(int i=1;i<=32000;++i)
		squares.push_back(i*i);
	int t;
	cin>>t;
	for(int k=1;k<=t;++k)
	{
		int a,b;
		cin>>a>>b;
		int ans=0;
		for(int i=0;i<squares.size();++i)
			if(squares[i]>=a && squares[i]<=b)
				++ans;
		cout<<ans<<endl;
	}
	return 0;
}