r = {}
 
commands = {
	'+' : lambda a, b: r[a]+r[b],
	'-' : lambda a, b: r[a]-r[b],
	'*' : lambda a, b: r[a]*r[b],
	'/' : lambda a, b: r[a]/r[b],
	'%' : lambda a, b: r[a]%r[b],
	'z' : lambda a, b: r.update({a:b})
}
 
try :
	while 1:
		line = raw_input().split()
		if len(line) != 3 :
			break
		command = line[0]
		a = int(line[1])
		b = int(line[2])
		result = commands[command](a, b)
		if result!=None :
			print result
 
except EOFError:
	pass

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eiAzIDYKeiAxIDg5CnogMiA2MAp6IDAgMTEKKyAwIDEKLSAxIDIKKiAyIDMKLyAzIDAKJSAzIDEKCg==

z 3 6
z 1 89
z 2 60
z 0 11
+ 0 1
- 1 2
* 2 3
/ 3 0
% 3 1