Răspuns:
#include <iostream>
using namespace std;
int main(){
long long int A,B,C,N,cb=1,cc=1,semn,aux;
cin>>A>>B>>C;
if(A>0){
semn=1;
}
else{
semn=-1;
}
aux=B;
while(aux>0){
cb*=10;
aux/=10;
}
aux=C;
while(aux>0){
cc*=10;
aux/=10;
}
N=((A*cb)+semn*B)*cc+semn*C;
cout<<N<<" "<<2*N;
}
Explicație: