# 1 vazifa
#k=int(input("k="))
#n=int(input("n="))
#for i in range(n):
# print(k)

# 2 vazifa
#a=int(input("a="))
#b=int(input("b="))
# a<b
#for i in range(a,b+1):
# print(i)

# 3- vazifa

#a=int(input("a= "))
#b=int(input("b= "))
# a<b
#for i in range(b,a-1,-1):
# print(i)


# 4-vazifa 1,


#a=int(input('1 kg uchun narx = '))
#for i in range(1,11):
#print( i, "kg olma" ,i*a, " sum" )

# 5-vazifa

#a=int(input(" 1 kg konfet narxi="))
#for i in range( 1, 11):
# print(i/10, " kg konfet narxi", i/10*a, " sum")

# 6-vazifa
#a=int(input(" 1 kg narxi= "))
#for i in range(1,6):
# print(1+i/5,"kg mi ", i*a+1/5*a)

#7-vazifa
c=0

a=int(input("a="))
b=int(input("b= "))
c=0
for i in range(a,b+1):
c+=i

print(c)

#8-vazifa
c=1
a=int(input("a="))
b=int(input("b= "))
for i in range(a,b+1):
c*=i

print(c)

# 9-vazifa
c=0
a=int(input("a="))
b=int(input("b= "))
for i in range(a,b+1):
c+=i*i

print(c)