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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. double x, S=0;
  6. while( cin>>x){
  7. S+=x;
  8. }
  9. cout<<S;
  10. return 0;
  11. }
Success #stdin #stdout 0s 16064KB
stdin
12 13 14 
stdout
39