def f(a):
if(a<0):
return -(a*(a-1)//2)
else:
return a*(a+1)//2
for i in range(int(input())):
a,b=map(int,input().split())
S1=0
S2=0
print("Scenario #",end="")
print(i+1,end=":\n")
if(a>0):
print(f(b)-f(a)+a)
elif(a<=0 and b>0):
print(f(b)+f(a))
else:
print(f(a)-f(b)+b)
print()