#include <iostream>

#include <string>

#include <stdlib.h>

using namespace std;

const int maxn=100;

int number[maxn];

char symbolt[maxn];

string s,t;

int i,j,p;

void push()

{

p++;

symbolt[p]=s[i];

}

void pop()

{

p--;

switch (symbolt[p+1])

{

case "+":{number[p]+=number[p+1];break;}

case "-":{number[p]=number[p]-number[p+1];break;}

case "*":{number[p]=number[p]*number[p+1];break;}

case "/":{number[p]=number[p]/number[p+1];break;}

}

}

bool can()

{

if (((s[i]=="+")||(s[i]=="-"))&&(symbolt[p]!="(")) return true;

if (((s[i]=="*")||(s[i]=="/"))&&((symbolt[p]=="*")||(symbolt[p]=="/"))) return true;

return false;

}

int stringToNumber(string aStr)

{

int number = 0;

for (int i=0;i<aStr.length();i++)

{

number = number*10 + aStr[i]-48;

}

return number;

}

int main()

{

cout<<"Input your string:";

cin>>s;

s="("+s+")";

i=0;

p=0;

while (i<=s.length()-1)

{

while (s[i]=="(")

{

push();

i++;

}

j=i;

do

{

i++;

}

while ((s[i]>="0")&&(s[i]<="9"));

int m;

t="";

int h=0;

for(m=j;m<i;m++) t=t+s[m];

number[p] = stringToNumber(t);;

do

{

if (s[i]==")")

{

while (symbolt[p]!="(") pop();

p--;

number[p]=number[p+1];

}

else

{

while (can()) pop();

push();

}

i++;

}

while ((i<=s.length())&&(s[i-1]==")"));

}

cout<<"Result="<<number[0]<<endl;

}