//faci asa:
int n;
cout<<"n=";
cin>>n;
//acum declari 2 vectori
int a[n], b[n];
//acum intri in for
for(i=0;i<n;i++){
cout<<"a["<<i<<"]=";
cin>>a[i];
cout<<"b["<<i<<"]=";
cin>>b[i];
}
//apoi faci suma pentru fiecare separat
sum1=0;
for(i=0;i<n;i++){
sum1 = sum1+a[i];
}
sum2=0;
for(i=0;i<n;i++){
sum2 = sum2+b[i];
}
apoi afisezi sum1 si sum2 :P