pat甲级-1001

#include <cmath>
#include <iomanip>

using namespace std;

int main(int argc, const char * argv[]) {
    
    long a,b;
    cin>>a>>b;
    if(a<-1000000||a>1000000||b<-1000000||b>1000000)
        return 0;
    long sum,part1,part2,part3;
    sum = a + b;
    if(sum<0)
    {
        cout<<"-";
        sum = abs(sum);
    }
    part1 = sum % 1000;
    sum = sum / 1000;
    part2 = sum % 1000;
    sum = sum / 1000;
    part3 = sum;
    if(part3 != 0)
    cout<<part3<<","<<setw(3)<<setfill('0')<<part2<<","<<setw(3)<<setfill('0')<<part1<<endl;
    if(part3 == 0 && part2 != 0)
        cout<<part2<<","<<setw(3)<<setfill('0')<<part1<<endl;
    if(part3 == 0 && part2 == 0 && part1 != 0)
        cout<<part1<<endl;
    if(part3 == 0 && part2 == 0 && part1 == 0)
        cout<<"0"<<endl;
   
    return 0;
}