1 #include<iostream> 2 #include<string> 3 using namespace std; 4 int main(){ 5     string s; 6     int i,sum=0; 7     bool flag=false,f=false; 8     getline(cin,s); 9     for(i=0;s[i]!=‘#‘;++i){10         if(s[i]==‘-‘&&!flag)11             f=true;12         else if(s[i]<=‘9‘&&s[i]>=‘0‘){13             sum=sum*16+s[i]-‘0‘;14             flag=true;15         }16         else if(s[i]<=‘f‘&&s[i]>=‘a‘){17             sum=sum*16+s[i]-‘a‘+10;18             flag=true;19         }20         else if(s[i]<=‘F‘&&s[i]>=‘A‘){21             sum=sum*16+s[i]-‘A‘+10;22             flag=true;23         }24     }25     if(f)26         sum=-sum;27     cout<<sum<<endl;28     return 0;29 }