hdu 2057 A + B Again

#include<iostream>#include<iomanip>using namespace std;int main(){long long a,b,c;while(cin>>hex>>a>>b){c=a+b;if(c<0){c=-c;cout<<'-'<<setiosflags(ios::uppercase)<<hex<<c<<endl;}else cout<<setiosflags(ios::uppercase)<<hex<<c<<endl;}return 0;}