# calculator

unknown
python
2 years ago
2.2 kB
19
Indexable
Never
```def Level(char):
if(char=='*' or char=='/'):
return 3
elif(char=='+' or char=='-'):
return 2
else:
return 1
def post(charlist):
po=[]
stack=[]
for char in charlist:
this_level=Level(char)
if(char=='('):
stack.append(char)
elif(char==')'):
while(len(stack)!=0 and stack[-1]!='('):
x=stack.pop()
po.append(x)
if(len(stack)!=0 and stack[-1]=='('):
stack.pop()
elif(this_level>1):
if(len(stack)!=0):
check_level=Level(stack[-1])
while(len(stack)!=0 and this_level<=check_level):
#print(stack[-1])
po.append(stack.pop())
if(len(stack)!=0):
check_level=Level(stack[-1])
stack.append(char)
#print(stack)
else:
po.append(char)
while(len(stack)!=0):
po.append(stack.pop())
return po
def calculate(polist):
stack=[]
for x in polist:
if(x=='+'):
n1=stack.pop()
n2=stack.pop()
stack.append(n2+n1)
elif(x=='-'):
n1=stack.pop()
n2=stack.pop()
stack.append(n2-n1)
elif(x=='*'):
n1=stack.pop()
n2=stack.pop()
stack.append(n2*n1)
elif(x=='/'):
n1=stack.pop()
n2=stack.pop()
if(n2//n1<0 and n2%n1!=0):
stack.append(n2//n1+1)
else:
stack.append(n2//n1)
else:
stack.append(x)
return stack[0]
if __name__=="__main__":
tmp=input()
charlist=[]
for i in range(len(tmp)):
charlist.append(tmp[i])
polist=post(charlist)
T=int(input())
for _ in range(T):
numberlist=list(map(int,input().split()))
j=0
for i in range(len(polist)):
if(Level(polist[i])==1):
polist[i]=numberlist[j]
j+=1
print(calculate(polist))```