include [HTML_REMOVED]
include [HTML_REMOVED]
using namespace std;
int main()
{
int n;
cin >> n;
for(int i = 1; i <= n; i )
{int x , y; cin >> x >> y;
if(x > y) swap(x,y);
int sum = 0;
{for(int k = x+1; k < y; k )
{ if(k % 2) sum += k;}
cout << sum <<endl; }
}
return 0;
}