a = 20

b = 10

if a == 100: 
    print "Gia tri la: " + str(a)
    print (a)
else:
    print "Gia tri la: " + str(b)

print "=================="

if a == 10:
    print a
elif a == 20:
    print "Ban da chon dung"
    print a
else:
    print "Ban da chon sai"
