#include<stack>#include<iostream>#include<string>using namespace std;//优先级判断char compare(char opt, char si){	if((opt==‘+‘||opt==‘-‘)&&(si==‘*‘||si==‘/‘)		return ‘<‘;	else if(opt==‘#‘)		return ‘<‘;	return ‘>‘;}//判断是否为运算符bool isOp(char c){	if(c==‘+‘||c==‘-‘||c==‘*‘||c==‘/‘)		return true;	return false;}int main(){	stack<char>op;	stack<char>num;	op.push(‘#‘);	num.push(‘#‘);		string s;	cin>>s;		for(int i=0;i<s.size();i++)	{		if(!isOp(s[i]))			num.push(s[i]);		else		{			char c=compare(op.top(),s[i]);			if(c==‘<‘)				op.push(s[i]);			else			{				num.push(op.top());				op.pop();				op.push(s[i]);			}		}	}    	while(op.top()!=‘#‘)	{		num.push(op.top());		op.pop();	}    string s1="";    while(num.top!=‘#‘)    {	     s1=s1+num.top();		 num.pop();    }	     for(int i=0;i<s1.size()/2;i++)	 {		 char temp=s1[i];		 s1[i]=s1[s1.size()-1-i];		 s1[s1.size()-1-i]=temp;	 }		      cout<<s1<<endl;	 	      return 0;}