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| #include <bits/stdc++.h>
using namespace std;
int main(){
int n;cin>>n;
string s;
while(n--){
cin>>s;
stack<int> stk;
bool legal = 1;
for(int i=0;i<s.size();i++){
if(s[i]==')'||s[i]==','||s[i]=='(');
else if(isdigit(s[i])){
int sum = s[i]-'0';
while(isdigit(s[++i])){
sum=sum*10+(s[i]-'0');
}
stk.push(sum);
i--;
}
else if(s[i]=='+'||s[i]=='-'||s[i]=='*'||s[i]=='/'){
if(s[i+1]!=')'){
legal = 0;
break;
}
int a = stk.top();
stk.pop();
int b = stk.top();
stk.pop();
if(s[i]=='+')stk.push(a+b);
else if(s[i]=='-')stk.push(b-a);
else if(s[i]=='*')stk.push(a*b);
else if(s[i]=='/'&& a==0){
legal = 0;
break;
}
else if(s[i]=='/')stk.push(b/a);
}
else{
legal = 0;
break;
}
}
if(legal==0)cout<<-1<<endl;
else if(stk.size()==1)cout<<stk.top()<<endl;
else cout<<-1<<endl;
}
}
|